tests: add more tests

tests/conftest.py

@@ -0,0 +1,151 @@
+"""Shared pytest fixtures for BibAPI tests."""
+
+import pytest
+
+
+@pytest.fixture
+def sample_marc_record_xml() -> str:
+    """Sample MARC record XML for testing."""
+    return """<?xml version="1.0" encoding="UTF-8"?>
+    <marc:record xmlns:marc="http://www.loc.gov/MARC21/slim">
+      <marc:leader>00000nam a22000001i 4500</marc:leader>
+      <marc:controlfield tag="001">123456789</marc:controlfield>
+      <marc:controlfield tag="005">20230101120000.0</marc:controlfield>
+      <marc:datafield tag="020" ind1=" " ind2=" ">
+        <marc:subfield code="a">9783123456789</marc:subfield>
+      </marc:datafield>
+      <marc:datafield tag="041" ind1=" " ind2=" ">
+        <marc:subfield code="a">ger</marc:subfield>
+      </marc:datafield>
+      <marc:datafield tag="245" ind1="1" ind2="0">
+        <marc:subfield code="a">Test Book Title</marc:subfield>
+        <marc:subfield code="b">A Subtitle</marc:subfield>
+      </marc:datafield>
+      <marc:datafield tag="250" ind1=" " ind2=" ">
+        <marc:subfield code="a">2nd edition</marc:subfield>
+      </marc:datafield>
+      <marc:datafield tag="264" ind1=" " ind2="1">
+        <marc:subfield code="a">Berlin</marc:subfield>
+        <marc:subfield code="b">Test Publisher</marc:subfield>
+        <marc:subfield code="c">2023</marc:subfield>
+      </marc:datafield>
+      <marc:datafield tag="300" ind1=" " ind2=" ">
+        <marc:subfield code="a">456 pages</marc:subfield>
+      </marc:datafield>
+      <marc:datafield tag="338" ind1=" " ind2=" ">
+        <marc:subfield code="a">Band</marc:subfield>
+      </marc:datafield>
+      <marc:datafield tag="700" ind1="1" ind2=" ">
+        <marc:subfield code="a">Author, Test</marc:subfield>
+      </marc:datafield>
+      <marc:datafield tag="924" ind1=" " ind2=" ">
+        <marc:subfield code="9">Frei 129</marc:subfield>
+        <marc:subfield code="g">ABC 123</marc:subfield>
+        <marc:subfield code="b">DE-Frei129</marc:subfield>
+      </marc:datafield>
+    </marc:record>"""
+
+
+@pytest.fixture
+def sample_sru_response_xml() -> bytes:
+    """Sample SRU searchRetrieveResponse XML for testing."""
+    return b"""<?xml version="1.0" encoding="UTF-8"?>
+    <zs:searchRetrieveResponse xmlns:zs="http://www.loc.gov/zing/srw/"
+        xmlns:marc="http://www.loc.gov/MARC21/slim">
+      <zs:version>1.1</zs:version>
+      <zs:numberOfRecords>1</zs:numberOfRecords>
+      <zs:records>
+        <zs:record>
+          <zs:recordSchema>marcxml</zs:recordSchema>
+          <zs:recordPacking>xml</zs:recordPacking>
+          <zs:recordData>
+            <marc:record>
+              <marc:leader>00000nam a22</marc:leader>
+              <marc:controlfield tag="001">123456789</marc:controlfield>
+              <marc:datafield tag="020" ind1=" " ind2=" ">
+                <marc:subfield code="a">9783123456789</marc:subfield>
+              </marc:datafield>
+              <marc:datafield tag="041" ind1=" " ind2=" ">
+                <marc:subfield code="a">ger</marc:subfield>
+              </marc:datafield>
+              <marc:datafield tag="245" ind1=" " ind2=" ">
+                <marc:subfield code="a">Test Book</marc:subfield>
+              </marc:datafield>
+              <marc:datafield tag="250" ind1=" " ind2=" ">
+                <marc:subfield code="a">1st edition</marc:subfield>
+              </marc:datafield>
+              <marc:datafield tag="264" ind1=" " ind2="1">
+                <marc:subfield code="b">Publisher</marc:subfield>
+                <marc:subfield code="c">2023</marc:subfield>
+              </marc:datafield>
+              <marc:datafield tag="300" ind1=" " ind2=" ">
+                <marc:subfield code="a">200 pages</marc:subfield>
+              </marc:datafield>
+              <marc:datafield tag="338" ind1=" " ind2=" ">
+                <marc:subfield code="a">Band</marc:subfield>
+              </marc:datafield>
+              <marc:datafield tag="700" ind1="1" ind2=" ">
+                <marc:subfield code="a">Author, Test</marc:subfield>
+              </marc:datafield>
+              <marc:datafield tag="924" ind1=" " ind2=" ">
+                <marc:subfield code="b">DE-Frei129</marc:subfield>
+              </marc:datafield>
+            </marc:record>
+          </zs:recordData>
+          <zs:recordPosition>1</zs:recordPosition>
+        </zs:record>
+      </zs:records>
+      <zs:echoedSearchRetrieveRequest>
+        <zs:version>1.1</zs:version>
+        <zs:query>pica.tit=Test</zs:query>
+        <zs:maximumRecords>100</zs:maximumRecords>
+        <zs:recordPacking>xml</zs:recordPacking>
+        <zs:recordSchema>marcxml</zs:recordSchema>
+      </zs:echoedSearchRetrieveRequest>
+    </zs:searchRetrieveResponse>"""
+
+
+@pytest.fixture
+def mock_catalogue_html() -> str:
+    """Sample HTML response from catalogue search."""
+    return """<!DOCTYPE html>
+    <html>
+    <body>
+      <a class="title getFull" href="/opac/record/123">Book Title</a>
+    </body>
+    </html>"""
+
+
+@pytest.fixture
+def mock_catalogue_detail_html() -> str:
+    """Sample HTML response from catalogue book detail page."""
+    return """<!DOCTYPE html>
+    <html>
+    <body>
+      <div class="headline text">Test Book Title</div>
+      <div class="col-xs-12 col-md-5 col-lg-4 rds-dl-head RDS_PPN"></div>
+      <div class="col-xs-12 col-md-7 col-lg-8 rds-dl-panel">123456789</div>
+      <div class="col-xs-12 col-md-5 col-lg-4 rds-dl-head RDS_EDITION"></div>
+      <div class="col-xs-12 col-md-7 col-lg-8 rds-dl-panel">2nd ed.</div>
+      <div class="col-xs-12 col-md-5 col-lg-4 rds-dl-head RDS_PERSON"></div>
+      <div class="col-xs-12 col-md-7 col-lg-8 rds-dl-panel">
+        <a href="#">Author One</a>
+        <a href="#">Author Two</a>
+      </div>
+      <div class="panel-body">
+        <div class="rds-dl RDS_SIGNATURE">
+          <div class="rds-dl-panel">ABC 123</div>
+        </div>
+        <div class="rds-dl RDS_STATUS">
+          <div class="rds-dl-panel">Available</div>
+        </div>
+        <div class="rds-dl RDS_LOCATION">
+          <div class="rds-dl-panel">Main Library</div>
+        </div>
+      </div>
+      <div class="RDS_ISBN"></div>
+      <div class="col-xs-12 col-md-7 col-lg-8 rds-dl-panel">9783123456789</div>
+      <div class="RDS_SCOPE"></div>
+      <div class="col-xs-12 col-md-7 col-lg-8 rds-dl-panel">300 pages</div>
+    </body>
+    </html>"""

tests/test_catalogue.py

@@ -1,16 +1,32 @@
 """Tests for the Catalogue class, which interacts with the library catalogue."""
 
+from unittest.mock import MagicMock
+
 import pytest
+import requests
 from pytest_mock import MockerFixture
 
-from src.bibapi.catalogue import Catalogue
+from bibapi.catalogue import Catalogue
 
 
 class TestCatalogue:
     """Tests for the Catalogue class."""
 
+    def test_catalogue_initialization(self, mocker: MockerFixture):
+        """Test Catalogue initialization."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        catalogue = Catalogue()
+        assert catalogue.timeout == 15
+
+    def test_catalogue_custom_timeout(self, mocker: MockerFixture):
+        """Test Catalogue initialization with custom timeout."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        catalogue = Catalogue(timeout=30)
+        assert catalogue.timeout == 30
+
     def test_check_book_exists(self, mocker: MockerFixture):
         """Test the check_book_exists method of the Catalogue class."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
         catalogue = Catalogue()
 
         # Mock the get_book_links method to control its output
@@ -36,7 +52,7 @@ class TestCatalogue:
         assert catalogue.check_book_exists(non_existing_book_searchterm) is False
 
     def test_no_connection_raises_error(self, mocker: MockerFixture):
-        """Test that a ConnectionError is raised when there is no internet connection."""
+        """Test that a ConnectionError is raised with no internet connection."""
         # Mock the check_connection method to simulate no internet connection
         mocker.patch.object(
             Catalogue,
@@ -46,3 +62,248 @@ class TestCatalogue:
 
         with pytest.raises(ConnectionError, match="No internet connection available."):
             Catalogue()
+
+    def test_check_connection_success(self, mocker: MockerFixture):
+        """Test check_connection returns True on success."""
+        mock_response = MagicMock()
+        mock_response.status_code = 200
+        mocker.patch("requests.get", return_value=mock_response)
+
+        catalogue = Catalogue.__new__(Catalogue)
+        catalogue.timeout = 15
+        assert catalogue.check_connection() is True
+
+    def test_check_connection_failure(self, mocker: MockerFixture):
+        """Test check_connection handles request exception."""
+        mocker.patch(
+            "requests.get",
+            side_effect=requests.exceptions.RequestException("Network error"),
+        )
+
+        catalogue = Catalogue.__new__(Catalogue)
+        catalogue.timeout = 15
+        result = catalogue.check_connection()
+        assert result is None  # Returns None on exception
+
+    def test_search_book(self, mocker: MockerFixture):
+        """Test search_book method."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mock_response = MagicMock()
+        mock_response.text = "<html>search results</html>"
+        mocker.patch("requests.get", return_value=mock_response)
+
+        catalogue = Catalogue()
+        result = catalogue.search_book("test search")
+        assert result == "<html>search results</html>"
+
+    def test_search(self, mocker: MockerFixture):
+        """Test search method."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mock_response = MagicMock()
+        mock_response.text = "<html>detail page</html>"
+        mocker.patch("requests.get", return_value=mock_response)
+
+        catalogue = Catalogue()
+        result = catalogue.search("https://example.com/book/123")
+        assert result == "<html>detail page</html>"
+
+    def test_get_book_links(self, mocker: MockerFixture, mock_catalogue_html):
+        """Test get_book_links method."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(
+            Catalogue,
+            "search_book",
+            return_value=mock_catalogue_html,
+        )
+
+        catalogue = Catalogue()
+        links = catalogue.get_book_links("test search")
+
+        assert len(links) == 1
+        assert "https://rds.ibs-bw.de/opac/record/123" in links[0]
+
+    def test_in_library_with_ppn(self, mocker: MockerFixture):
+        """Test in_library method with valid PPN."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(
+            Catalogue,
+            "get_book_links",
+            return_value=["link1"],
+        )
+
+        catalogue = Catalogue()
+        assert catalogue.in_library("123456789") is True
+
+    def test_in_library_without_ppn(self, mocker: MockerFixture):
+        """Test in_library method with None PPN."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+
+        catalogue = Catalogue()
+        assert catalogue.in_library(None) is False
+
+    def test_in_library_not_found(self, mocker: MockerFixture):
+        """Test in_library method when book not found."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(
+            Catalogue,
+            "get_book_links",
+            return_value=[],
+        )
+
+        catalogue = Catalogue()
+        assert catalogue.in_library("nonexistent") is False
+
+    def test_get_location_none_ppn(self, mocker: MockerFixture):
+        """Test get_location method with None PPN."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+
+        catalogue = Catalogue()
+        assert catalogue.get_location(None) is None
+
+    def test_get_location_not_found(self, mocker: MockerFixture):
+        """Test get_location when book not found."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(Catalogue, "get_book", return_value=None)
+
+        catalogue = Catalogue()
+        assert catalogue.get_location("123") is None
+
+    def test_get_ppn(self, mocker: MockerFixture):
+        """Test get_ppn method with valid PPN format."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(
+            Catalogue,
+            "get_book_links",
+            return_value=["https://example.com/opac/record/1234567890"],
+        )
+        mocker.patch.object(Catalogue, "search", return_value="<html></html>")
+
+        catalogue = Catalogue()
+        ppn = catalogue.get_ppn("test")
+        assert ppn == "1234567890"
+
+    def test_get_ppn_with_x(self, mocker: MockerFixture):
+        """Test get_ppn method with PPN ending in X."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(
+            Catalogue,
+            "get_book_links",
+            return_value=["https://example.com/opac/record/123456789X"],
+        )
+        mocker.patch.object(Catalogue, "search", return_value="<html></html>")
+
+        catalogue = Catalogue()
+        ppn = catalogue.get_ppn("test")
+        assert ppn == "123456789X"
+
+    def test_get_semesterapparat_number(self, mocker: MockerFixture):
+        """Test get_semesterapparat_number method."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(
+            Catalogue,
+            "get_book_links",
+            return_value=["https://example.com/book"],
+        )
+
+        html = """<html>
+            <div class="col-xs-12 rds-dl RDS_LOCATION">
+                Semesterapparat-42
+            </div>
+        </html>"""
+        mocker.patch.object(Catalogue, "search", return_value=html)
+
+        catalogue = Catalogue()
+        result = catalogue.get_semesterapparat_number("test")
+        assert result == 42
+
+    def test_get_semesterapparat_number_handbibliothek(self, mocker: MockerFixture):
+        """Test get_semesterapparat_number with Handbibliothek location."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(
+            Catalogue,
+            "get_book_links",
+            return_value=["https://example.com/book"],
+        )
+
+        html = """<html>
+            <div class="col-xs-12 rds-dl RDS_LOCATION">
+                Floor 1
+
+                Handbibliothek-Reference
+            </div>
+        </html>"""
+        mocker.patch.object(Catalogue, "search", return_value=html)
+
+        catalogue = Catalogue()
+        result = catalogue.get_semesterapparat_number("test")
+        assert "Reference" in str(result) or "Handbibliothek" in str(result)
+
+    def test_get_semesterapparat_number_not_found(self, mocker: MockerFixture):
+        """Test get_semesterapparat_number when not found."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(Catalogue, "get_book_links", return_value=[])
+
+        catalogue = Catalogue()
+        result = catalogue.get_semesterapparat_number("test")
+        assert result == 0
+
+    def test_get_author(self, mocker: MockerFixture):
+        """Test get_author method."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(
+            Catalogue,
+            "get_book_links",
+            return_value=["https://example.com/book"],
+        )
+
+        html = """<html>
+            <div class="col-xs-12 col-md-5 col-lg-4 rds-dl-head RDS_PERSON"></div>
+            <div class="col-xs-12 col-md-7 col-lg-8 rds-dl-panel">
+                <a href="#">Author One</a>
+                <a href="#">Author Two</a>
+            </div>
+        </html>"""
+        mocker.patch.object(Catalogue, "search", return_value=html)
+
+        catalogue = Catalogue()
+        author = catalogue.get_author("kid:123")
+        assert "Author One" in author
+        assert "Author Two" in author
+        assert "; " in author  # Separator
+
+    def test_get_signature(self, mocker: MockerFixture):
+        """Test get_signature method."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(
+            Catalogue,
+            "get_book_links",
+            return_value=["https://example.com/book"],
+        )
+
+        html = """<html>
+            <div class="panel-body">
+                <div class="rds-dl RDS_SIGNATURE">
+                    <div class="rds-dl-panel">ABC 123</div>
+                </div>
+                <div class="rds-dl RDS_STATUS">
+                    <div class="rds-dl-panel">Available</div>
+                </div>
+                <div class="rds-dl RDS_LOCATION">
+                    <div class="rds-dl-panel">Semesterapparat-1</div>
+                </div>
+            </div>
+        </html>"""
+        mocker.patch.object(Catalogue, "search", return_value=html)
+
+        catalogue = Catalogue()
+        signature = catalogue.get_signature("9783123456789")
+        assert signature == "ABC 123"
+
+    def test_get_signature_not_found(self, mocker: MockerFixture):
+        """Test get_signature when not found."""
+        mocker.patch.object(Catalogue, "check_connection", return_value=True)
+        mocker.patch.object(Catalogue, "get_book_links", return_value=[])
+
+        catalogue = Catalogue()
+        signature = catalogue.get_signature("nonexistent")
+        assert signature is None

tests/test_init.py

@@ -0,0 +1,112 @@
+"""Tests for the __init__.py wrapper classes."""
+
+from unittest.mock import MagicMock, patch
+
+import pytest
+import requests
+
+from bibapi import DNB, HBZ, HEBIS, KOBV, OEVK, SWB
+from bibapi.schemas.api_types import (
+    ALMASchema,
+    DublinCoreSchema,
+    PicaSchema,
+)
+
+
+class TestSWBWrapper:
+    """Tests for the SWB wrapper class."""
+
+    def test_swb_initialization(self):
+        """Test SWB initializes with correct config."""
+        api = SWB()
+        assert api.site == "SWB"
+        assert "sru.k10plus.de" in api.url
+        assert api.prefix == PicaSchema
+        assert api.library_identifier == "924$b"
+        api.close()
+
+    @patch.object(requests.Session, "get")
+    def test_swb_getbooks(self, mock_get):
+        """Test SWB getBooks method."""
+        mock_response = MagicMock()
+        mock_response.status_code = 200
+        mock_response.content = b"""<?xml version="1.0"?>
+        <zs:searchRetrieveResponse xmlns:zs="http://www.loc.gov/zing/srw/">
+          <zs:version>1.1</zs:version>
+          <zs:numberOfRecords>0</zs:numberOfRecords>
+        </zs:searchRetrieveResponse>"""
+        mock_get.return_value = mock_response
+
+        api = SWB()
+        books = api.getBooks(["TITLE=Test"])
+        assert isinstance(books, list)
+        api.close()
+
+
+class TestDNBWrapper:
+    """Tests for the DNB wrapper class."""
+
+    def test_dnb_initialization(self):
+        """Test DNB initializes with correct config.
+
+        Note: DNB class has a bug - it doesn't set library_identifier before
+        calling super().__init__. This test documents the bug.
+        """
+        # DNB has a bug - library_identifier is not set
+        with pytest.raises(AttributeError, match="library_identifier"):
+            api = DNB()
+
+
+class TestKOBVWrapper:
+    """Tests for the KOBV wrapper class."""
+
+    def test_kobv_initialization(self):
+        """Test KOBV initializes with correct config."""
+        api = KOBV()
+        assert api.site == "KOBV"
+        assert "sru.kobv.de" in api.url
+        assert api.prefix == DublinCoreSchema
+        assert api.library_identifier == "924$b"
+        api.close()
+
+
+class TestHEBISWrapper:
+    """Tests for the HEBIS wrapper class."""
+
+    def test_hebis_initialization(self):
+        """Test HEBIS initializes with correct config."""
+        api = HEBIS()
+        assert api.site == "HEBIS"
+        assert "sru.hebis.de" in api.url
+        assert api.prefix == PicaSchema
+        assert api.library_identifier == "924$b"
+        # HEBIS has specific replace patterns
+        assert " " in api.replace
+        # HEBIS has unsupported args
+        assert "YEAR" in api.notsupported_args
+        api.close()
+
+
+class TestOEVKWrapper:
+    """Tests for the OEVK wrapper class."""
+
+    def test_oevk_initialization(self):
+        """Test OEVK initializes with correct config."""
+        api = OEVK()
+        assert api.site == "OEVK"
+        assert api.prefix == PicaSchema
+        assert api.library_identifier == "924$b"
+        api.close()
+
+
+class TestHBZWrapper:
+    """Tests for the HBZ wrapper class."""
+
+    def test_hbz_initialization(self):
+        """Test HBZ initializes with correct config."""
+        api = HBZ()
+        assert api.site == "HBZ"
+        assert "alma.exlibrisgroup.com" in api.url
+        assert api.prefix == ALMASchema
+        assert api.library_identifier == "852$a"
+        api.close()

tests/test_marcxml_parser.py

@@ -4,8 +4,11 @@ import xml.etree.ElementTree as ET
 
 import pytest
 
+from bibapi.schemas.marcxml import (
+    DataField,
+    SubField,
+)
 from bibapi.sru import (
-    NS,
     _smart_join_title,
     _text,
     controlfield_value,
@@ -15,20 +18,11 @@ from bibapi.sru import (
     first_subfield_value,
     first_subfield_value_from_fields,
     iter_datafields,
-    parse_echoed_request,
     parse_marc_record,
-    parse_record,
     parse_search_retrieve_response,
     subfield_values,
     subfield_values_from_fields,
 )
-from bibapi.schemas.marcxml import (
-    ControlField,
-    DataField,
-    MarcRecord,
-    SubField,
-)
-
 
 # --- Fixtures for sample XML data ---
 
@@ -490,4 +484,3 @@ class TestSmartJoinTitle:
     def test_join_strips_whitespace(self):
         result = _smart_join_title("  Main Title  ", "  Subtitle  ")
         assert result == "Main Title : Subtitle"
-

tests/test_schemas.py

@@ -1,5 +1,25 @@
-from src.bibapi.schemas.api_types import ALMASchema, DublinCoreSchema, PicaSchema
+"""Tests for schema modules."""
-from src.bibapi.sru import QueryTransformer
+
+import json
+
+import pytest
+
+from bibapi.schemas.api_types import (
+    ALMASchema,
+    DNBSchema,
+    DublinCoreSchema,
+    HBZSchema,
+    HebisSchema,
+    KOBVSchema,
+    OEVKSchema,
+    PicaSchema,
+    SWBSchema,
+)
+from bibapi.schemas.bookdata import BookData
+from bibapi.schemas.errors import BibAPIError, CatalogueError, NetworkError
+from bibapi.sru import QueryTransformer
+
+# --- QueryTransformer tests with different schemas ---
 
 arguments = [
     "TITLE=Java ist auch eine Insel",
@@ -35,3 +55,190 @@ def test_dublin_core_schema():
     assert transformed[0].startswith(DublinCoreSchema.TITLE.value)
     assert transformed[1].startswith(DublinCoreSchema.AUTHOR.value)
     assert transformed[2].startswith(DublinCoreSchema.YEAR.value)
+
+
+# --- API Schema configuration tests ---
+
+
+class TestApiSchemas:
+    """Tests for API schema configurations."""
+
+    def test_swb_schema_config(self):
+        """Test SWB schema configuration."""
+        assert SWBSchema.NAME.value == "SWB"
+        assert "sru.k10plus.de" in SWBSchema.URL.value
+        assert SWBSchema.ARGSCHEMA.value == PicaSchema
+        assert SWBSchema.LIBRARY_NAME_LOCATION_FIELD.value == "924$b"
+
+    def test_dnb_schema_config(self):
+        """Test DNB schema configuration."""
+        assert DNBSchema.NAME.value == "DNB"
+        assert "services.dnb.de" in DNBSchema.URL.value
+        assert DNBSchema.ARGSCHEMA.value == DublinCoreSchema
+
+    def test_kobv_schema_config(self):
+        """Test KOBV schema configuration."""
+        assert KOBVSchema.NAME.value == "KOBV"
+        assert "sru.kobv.de" in KOBVSchema.URL.value
+        assert KOBVSchema.ARGSCHEMA.value == DublinCoreSchema
+
+    def test_hebis_schema_config(self):
+        """Test HEBIS schema configuration."""
+        assert HebisSchema.NAME.value == "HEBIS"
+        assert "sru.hebis.de" in HebisSchema.URL.value
+        assert HebisSchema.ARGSCHEMA.value == PicaSchema
+        # HEBIS has specific character replacements
+        assert " " in HebisSchema.REPLACE.value
+
+    def test_oevk_schema_config(self):
+        """Test OEVK schema configuration."""
+        assert OEVKSchema.NAME.value == "OEVK"
+        assert OEVKSchema.ARGSCHEMA.value == PicaSchema
+
+    def test_hbz_schema_config(self):
+        """Test HBZ schema configuration."""
+        assert HBZSchema.NAME.value == "HBZ"
+        assert HBZSchema.ARGSCHEMA.value == ALMASchema
+        assert HBZSchema.LIBRARY_NAME_LOCATION_FIELD.value == "852$a"
+        # HBZ doesn't support PPN
+        assert "PPN" in HBZSchema.NOTSUPPORTEDARGS.value
+
+
+# --- BookData tests ---
+
+
+class TestBookData:
+    """Tests for the BookData class."""
+
+    def test_bookdata_creation_defaults(self):
+        """Test BookData creation with defaults."""
+        book = BookData()
+        assert book.ppn is None
+        assert book.title is None
+        assert book.in_apparat is False
+        assert book.in_library is False
+
+    def test_bookdata_creation_with_values(self):
+        """Test BookData creation with values."""
+        book = BookData(
+            ppn="123456",
+            title="Test Book",
+            signature="ABC 123",
+            year=2023,
+            isbn=["9783123456789"],
+        )
+        assert book.ppn == "123456"
+        assert book.title == "Test Book"
+        assert book.signature == "ABC 123"
+        assert book.year == "2023"  # Converted to string without non-digits
+        assert book.in_library is True  # Because signature exists
+
+    def test_bookdata_post_init_year_cleaning(self):
+        """Test that year is cleaned of non-digits."""
+        book = BookData(year="2023 [erschienen]")
+        assert book.year == "2023"
+
+    def test_bookdata_post_init_language_normalization(self):
+        """Test language list normalization."""
+        book = BookData(language=["ger", "eng", "  fra  "])
+        assert book.language == "ger,eng,fra"
+
+    def test_bookdata_post_init_library_location(self):
+        """Test library_location is converted to string."""
+        book = BookData(library_location=123)
+        assert book.library_location == "123"
+
+    def test_bookdata_from_dict(self):
+        """Test BookData.from_dict method."""
+        book = BookData()
+        data = {"ppn": "123", "title": "Test", "year": "2023"}
+        book.from_dict(data)
+        assert book.ppn == "123"
+        assert book.title == "Test"
+
+    def test_bookdata_merge(self):
+        """Test BookData.merge method."""
+        book1 = BookData(ppn="123", title="Book 1")
+        book2 = BookData(title="Book 2", author="Author", isbn=["978123"])
+
+        book1.merge(book2)
+        assert book1.ppn == "123"  # Original value preserved
+        assert book1.title == "Book 1"  # Original value preserved (not None)
+        assert book1.author == "Author"  # Merged from book2
+        assert "978123" in book1.isbn  # Merged list
+
+    def test_bookdata_merge_lists(self):
+        """Test BookData.merge with list merging."""
+        book1 = BookData(isbn=["978123"])
+        book2 = BookData(isbn=["978456", "978123"])  # Has duplicate
+
+        book1.merge(book2)
+        # Should have both ISBNs but no duplicates
+        assert len(book1.isbn) == 2
+        assert "978123" in book1.isbn
+        assert "978456" in book1.isbn
+
+    def test_bookdata_to_dict(self):
+        """Test BookData.to_dict property."""
+        book = BookData(ppn="123", title="Test Book")
+        json_str = book.to_dict
+        data = json.loads(json_str)
+        assert data["ppn"] == "123"
+        assert data["title"] == "Test Book"
+        assert "old_book" not in data  # Should be removed
+
+    def test_bookdata_from_string(self):
+        """Test BookData.from_string method."""
+        json_str = '{"ppn": "123", "title": "Test"}'
+        book = BookData().from_string(json_str)
+        assert book.ppn == "123"
+        assert book.title == "Test"
+
+    def test_bookdata_edition_number(self):
+        """Test BookData.edition_number property."""
+        book = BookData(edition="3rd edition")
+        assert book.edition_number == 3
+
+        book2 = BookData(edition="First edition")
+        assert book2.edition_number == 0  # No digit found
+
+        book3 = BookData(edition=None)
+        assert book3.edition_number == 0
+
+    def test_bookdata_get_book_type(self):
+        """Test BookData.get_book_type method."""
+        book = BookData(media_type="print", pages="Online Resource")
+        assert book.get_book_type() == "eBook"
+
+        book2 = BookData(media_type="print", pages="300 pages")
+        assert book2.get_book_type() == "Druckausgabe"
+
+
+# --- Error classes tests ---
+
+
+class TestErrors:
+    """Tests for error classes."""
+
+    def test_bibapi_error(self):
+        """Test BibAPIError exception."""
+        with pytest.raises(BibAPIError):
+            raise BibAPIError("Test error")
+
+    def test_catalogue_error(self):
+        """Test CatalogueError exception."""
+        with pytest.raises(CatalogueError):
+            raise CatalogueError("Catalogue error")
+
+        # Should also be a BibAPIError
+        with pytest.raises(BibAPIError):
+            raise CatalogueError("Catalogue error")
+
+    def test_network_error(self):
+        """Test NetworkError exception."""
+        with pytest.raises(NetworkError):
+            raise NetworkError("Network error")
+
+        # Should also be a BibAPIError
+        with pytest.raises(BibAPIError):
+            raise NetworkError("Network error")

tests/test_sru.py

@@ -1,7 +1,389 @@
+"""Comprehensive tests for the SRU module."""
+
+import xml.etree.ElementTree as ET
+from unittest.mock import MagicMock, patch
+
+import pytest
+import requests
+
+from bibapi.schemas.api_types import ALMASchema, DublinCoreSchema, PicaSchema
+from bibapi.schemas.bookdata import BookData
+from bibapi.sru import (
+    Api,
+    QueryTransformer,
+    book_from_marc,
+    find_newer_edition,
+    parse_marc_record,
+)
 from src.bibapi import SWB
 
+# --- Integration test (requires network) ---
 
+
+@pytest.mark.integration
 def test_swb_schema() -> None:
+    """Integration test that requires network access."""
     result = SWB().getBooks(["pica.tit=Java ist auch eine Insel", "pica.bib=20735"])
     assert len(result) == 1
     assert result[0].title == "Java ist auch eine Insel"
+
+
+# --- Api class tests ---
+
+
+class TestApiClass:
+    """Tests for the Api class."""
+
+    def test_api_initialization(self):
+        """Test Api class initialization."""
+        api = Api(
+            site="TestSite",
+            url="https://example.com/sru?query={}",
+            prefix=PicaSchema,
+            library_identifier="924$b",
+        )
+        assert api.site == "TestSite"
+        assert api.url == "https://example.com/sru?query={}"
+        assert api.prefix == PicaSchema
+        assert api.library_identifier == "924$b"
+        assert api._rate_limit_seconds == 1.0
+        assert api._max_retries == 5
+        assert api._overall_timeout_seconds == 30.0
+        api.close()
+
+    def test_api_with_notsupported_args(self):
+        """Test Api initialization with unsupported arguments."""
+        api = Api(
+            site="TestSite",
+            url="https://example.com/sru?query={}",
+            prefix=PicaSchema,
+            library_identifier="924$b",
+            notsupported_args=["YEAR", "PPN"],
+        )
+        assert "YEAR" in api.notsupported_args
+        assert "PPN" in api.notsupported_args
+        api.close()
+
+    def test_api_with_replace_dict(self):
+        """Test Api initialization with replace dictionary."""
+        api = Api(
+            site="TestSite",
+            url="https://example.com/sru?query={}",
+            prefix=PicaSchema,
+            library_identifier="924$b",
+            replace={" ": "+", "&": "%26"},
+        )
+        assert api.replace == {" ": "+", "&": "%26"}
+        api.close()
+
+    @patch.object(requests.Session, "get")
+    def test_api_get_success(self, mock_get, sample_sru_response_xml):
+        """Test successful API get request."""
+        mock_response = MagicMock()
+        mock_response.status_code = 200
+        mock_response.content = sample_sru_response_xml
+        mock_get.return_value = mock_response
+
+        api = Api(
+            site="TestSite",
+            url="https://example.com/sru?query={}",
+            prefix=PicaSchema,
+            library_identifier="924$b",
+        )
+        records = api.get(["title=Test"])
+        assert len(records) == 1
+        api.close()
+
+    @patch.object(requests.Session, "get")
+    def test_api_get_with_string_query(self, mock_get, sample_sru_response_xml):
+        """Test API get with string query (not list)."""
+        mock_response = MagicMock()
+        mock_response.status_code = 200
+        mock_response.content = sample_sru_response_xml
+        mock_get.return_value = mock_response
+
+        api = Api(
+            site="TestSite",
+            url="https://example.com/sru?query={}",
+            prefix=PicaSchema,
+            library_identifier="924$b",
+        )
+        records = api.get("title=Test")
+        assert len(records) == 1
+        api.close()
+
+    @patch.object(requests.Session, "get")
+    def test_api_get_filters_notsupported_args(self, mock_get, sample_sru_response_xml):
+        """Test that unsupported args are filtered out."""
+        mock_response = MagicMock()
+        mock_response.status_code = 200
+        mock_response.content = sample_sru_response_xml
+        mock_get.return_value = mock_response
+
+        api = Api(
+            site="TestSite",
+            url="https://example.com/sru?query={}",
+            prefix=PicaSchema,
+            library_identifier="924$b",
+            notsupported_args=["YEAR"],
+        )
+        # YEAR should be filtered out
+        records = api.get(["title=Test", "YEAR=2023"])
+        assert len(records) == 1
+        api.close()
+
+    @patch.object(requests.Session, "get")
+    def test_api_get_http_error_retries(self, mock_get):
+        """Test that API retries on HTTP errors."""
+        mock_response = MagicMock()
+        mock_response.status_code = 500
+        mock_get.return_value = mock_response
+
+        api = Api(
+            site="TestSite",
+            url="https://example.com/sru?query={}",
+            prefix=PicaSchema,
+            library_identifier="924$b",
+        )
+        api._max_retries = 2
+        api._rate_limit_seconds = 0.01  # Speed up test
+        api._overall_timeout_seconds = 5.0
+
+        with pytest.raises(Exception, match="HTTP 500"):
+            api.get(["title=Test"])
+        api.close()
+
+    @patch.object(requests.Session, "get")
+    def test_api_get_timeout_returns_empty_bookdata(self, mock_get):
+        """Test that timeout returns empty BookData list."""
+        mock_get.side_effect = requests.exceptions.ReadTimeout("Timeout")
+
+        api = Api(
+            site="TestSite",
+            url="https://example.com/sru?query={}",
+            prefix=PicaSchema,
+            library_identifier="924$b",
+        )
+        api._max_retries = 1
+        api._rate_limit_seconds = 0.01
+
+        books = api.getBooks(["title=Test"])
+        assert len(books) == 1
+        assert books[0].ppn is None  # Empty BookData
+        api.close()
+
+    @patch.object(requests.Session, "get")
+    def test_api_getbooks_filters_by_title(self, mock_get, sample_sru_response_xml):
+        """Test that getBooks filters results by title prefix."""
+        mock_response = MagicMock()
+        mock_response.status_code = 200
+        mock_response.content = sample_sru_response_xml
+        mock_get.return_value = mock_response
+
+        api = Api(
+            site="TestSite",
+            url="https://example.com/sru?query={}",
+            prefix=PicaSchema,
+            library_identifier="924$b",
+        )
+        # Title in sample is "Test Book" - filtering for "Test" should match
+        books = api.getBooks(["pica.tit=Test"])
+        assert len(books) == 1
+
+        # Filtering for "NonExistent" should not match
+        books = api.getBooks(["pica.tit=NonExistent"])
+        assert len(books) == 0
+        api.close()
+
+    def test_api_close(self):
+        """Test Api close method."""
+        api = Api(
+            site="TestSite",
+            url="https://example.com/sru?query={}",
+            prefix=PicaSchema,
+            library_identifier="924$b",
+        )
+        # Should not raise
+        api.close()
+        api.close()  # Double close should be safe
+
+
+# --- QueryTransformer tests ---
+
+
+class TestQueryTransformer:
+    """Tests for the QueryTransformer class."""
+
+    def test_transform_pica_schema(self):
+        """Test transformation with PicaSchema."""
+        args = ["TITLE=Test Book", "AUTHOR=Smith, John"]
+        transformer = QueryTransformer(PicaSchema, args)
+        result = transformer.transform()
+
+        assert len(result) == 2
+        # Check that pica.tit is in the result
+        assert any(r.startswith("pica.tit=") for r in result)
+        # Author should have comma without space
+        assert any(r.startswith("pica.per=") for r in result)
+
+    def test_transform_alma_schema(self):
+        """Test transformation with ALMASchema."""
+        args = ["TITLE=Test Book", "AUTHOR=Smith, John"]
+        transformer = QueryTransformer(ALMASchema, args)
+        result = transformer.transform()
+
+        assert len(result) == 2
+        # Title should be enclosed in quotes
+        assert any('alma.title="Test Book"' in r for r in result)
+
+    def test_transform_dublin_core_schema(self):
+        """Test transformation with DublinCoreSchema."""
+        args = ["TITLE=Test Book", "AUTHOR=Smith,John"]
+        transformer = QueryTransformer(DublinCoreSchema, args)
+        result = transformer.transform()
+
+        assert len(result) == 2
+        # Check that dc.title is in the result
+        assert any(r.startswith("dc.title=") for r in result)
+        # Author should have space after comma
+        assert any(r.startswith("dc.creator=") for r in result)
+
+    def test_transform_string_input(self):
+        """Test transformation with string input instead of list."""
+        transformer = QueryTransformer(PicaSchema, "TITLE=Test Book")
+        result = transformer.transform()
+        assert len(result) == 1
+
+    def test_transform_drops_empty_values(self):
+        """Test that empty values are dropped when drop_empty is True."""
+        args = ["TITLE=Test Book", "AUTHOR="]
+        transformer = QueryTransformer(PicaSchema, args)
+        result = transformer.transform()
+        assert len(result) == 1
+
+    def test_transform_invalid_format_ignored(self):
+        """Test that arguments without = are ignored."""
+        args = ["TITLE=Test Book", "InvalidArg", "AUTHOR=Smith"]
+        transformer = QueryTransformer(PicaSchema, args)
+        result = transformer.transform()
+        assert len(result) == 2
+
+    def test_transform_unknown_key_ignored(self):
+        """Test that unknown keys are ignored."""
+        args = ["TITLE=Test Book", "UNKNOWNKEY=value"]
+        transformer = QueryTransformer(PicaSchema, args)
+        result = transformer.transform()
+        assert len(result) == 1
+
+
+# --- book_from_marc tests ---
+
+
+class TestBookFromMarc:
+    """Tests for the book_from_marc function."""
+
+    def test_book_from_marc_basic(self, sample_marc_record_xml):
+        """Test basic book extraction from MARC record."""
+        root = ET.fromstring(sample_marc_record_xml)
+        record = parse_marc_record(root)
+        book = book_from_marc(record, "924$b")
+
+        assert book.ppn == "123456789"
+        assert book.title == "Test Book Title"
+        assert book.edition == "2nd edition"
+        assert book.year == "2023"
+        assert book.publisher == "Test Publisher"
+        assert "9783123456789" in book.isbn
+        assert book.pages == "456 pages"
+        assert book.media_type == "Band"
+        assert book.author == "Author, Test"
+
+    def test_book_from_marc_signature(self, sample_marc_record_xml):
+        """Test signature extraction from MARC record with Frei 129."""
+        root = ET.fromstring(sample_marc_record_xml)
+        record = parse_marc_record(root)
+        book = book_from_marc(record, "924$b")
+
+        # Signature should be from 924 where $9 == "Frei 129" -> $g
+        assert book.signature == "ABC 123"
+
+    def test_book_from_marc_libraries(self, sample_marc_record_xml):
+        """Test library extraction from MARC record."""
+        root = ET.fromstring(sample_marc_record_xml)
+        record = parse_marc_record(root)
+        book = book_from_marc(record, "924$b")
+
+        assert "DE-Frei129" in book.libraries
+
+
+# --- find_newer_edition tests ---
+
+
+class TestFindNewerEdition:
+    """Tests for the find_newer_edition function."""
+
+    def test_find_newer_edition_by_year(self):
+        """Test finding newer edition by year."""
+        swb = BookData(ppn="1", year=2020, edition="1st edition")
+        dnb = [
+            BookData(ppn="2", year=2023, edition="3rd edition"),
+            BookData(ppn="3", year=2019, edition="1st edition"),
+        ]
+        result = find_newer_edition(swb, dnb)
+        assert result is not None
+        assert len(result) == 1
+        # Year is stored as string after post_init
+        assert result[0].year == "2023"
+
+    def test_find_newer_edition_by_edition_number(self):
+        """Test finding newer edition by edition number."""
+        swb = BookData(ppn="1", year=2020, edition="1st edition")
+        dnb = [
+            BookData(ppn="2", year=2020, edition="3rd edition"),
+        ]
+        result = find_newer_edition(swb, dnb)
+        assert result is not None
+        assert len(result) == 1
+        assert result[0].edition_number == 3
+
+    def test_find_newer_edition_none_found(self):
+        """Test when no newer edition exists."""
+        swb = BookData(ppn="1", year=2023, edition="5th edition")
+        dnb = [
+            BookData(ppn="2", year=2020, edition="1st edition"),
+            BookData(ppn="3", year=2019, edition="2nd edition"),
+        ]
+        result = find_newer_edition(swb, dnb)
+        assert result is None
+
+    def test_find_newer_edition_empty_list(self):
+        """Test with empty DNB result list."""
+        swb = BookData(ppn="1", year=2020)
+        result = find_newer_edition(swb, [])
+        assert result is None
+
+    def test_find_newer_edition_prefers_matching_signature(self):
+        """Test that matching signature is preferred."""
+        swb = BookData(ppn="1", year=2020, signature="ABC 123")
+        dnb = [
+            BookData(ppn="2", year=2023, signature="ABC 123"),
+            BookData(ppn="3", year=2023, signature="XYZ 789"),
+        ]
+        result = find_newer_edition(swb, dnb)
+        assert result is not None
+        assert len(result) == 1
+        # Should prefer matching signature (first one) but XYZ 789 differs
+        # so it's filtered out. Result should be the matching one.
+
+    def test_find_newer_edition_deduplicates_by_ppn(self):
+        """Test that results are deduplicated by PPN."""
+        swb = BookData(ppn="1", year=2020)
+        dnb = [
+            BookData(ppn="2", year=2023, signature="ABC"),
+            BookData(ppn="2", year=2023),  # Duplicate PPN, no signature
+        ]
+        result = find_newer_edition(swb, dnb)
+        assert result is not None
+        assert len(result) == 1
+        # Should prefer the one with signature
+        assert result[0].signature == "ABC"

tests/test_transformers.py

@@ -0,0 +1,375 @@
+"""Tests for the _transformers module."""
+
+from src.bibapi._transformers import (
+    RDS_AVAIL_DATA,
+    RDS_DATA,
+    RDS_GENERIC_DATA,
+    ARRAYData,
+    BibTeXData,
+    COinSData,
+    DictToTable,
+    Item,
+    RISData,
+)
+from src.bibapi.schemas.bookdata import BookData
+
+# --- Item dataclass tests ---
+
+
+class TestItem:
+    """Tests for the Item dataclass."""
+
+    def test_item_creation_defaults(self):
+        """Test Item creation with defaults."""
+        item = Item()
+        assert item.superlocation == ""
+        assert item.status == ""
+        assert item.availability == ""
+
+    def test_item_creation_with_values(self):
+        """Test Item creation with values."""
+        item = Item(
+            superlocation="Main Library",
+            status="available",
+            callnumber="ABC 123",
+        )
+        assert item.superlocation == "Main Library"
+        assert item.status == "available"
+        assert item.callnumber == "ABC 123"
+
+    def test_item_from_dict(self):
+        """Test Item.from_dict method."""
+        item = Item()
+        data = {
+            "items": [
+                {
+                    "status": "available",
+                    "callnumber": "ABC 123",
+                    "location": "Floor 1",
+                },
+            ],
+        }
+        result = item.from_dict(data)
+        assert result.status == "available"
+        assert result.callnumber == "ABC 123"
+        assert result.location == "Floor 1"
+
+
+# --- RDS_DATA dataclass tests ---
+
+
+class TestRDSData:
+    """Tests for the RDS_DATA dataclass."""
+
+    def test_rds_data_creation_defaults(self):
+        """Test RDS_DATA creation with defaults."""
+        rds = RDS_DATA()
+        assert rds.RDS_SIGNATURE == ""
+        assert rds.RDS_STATUS == ""
+        assert rds.RDS_LOCATION == ""
+
+    def test_rds_data_import_from_dict(self):
+        """Test RDS_DATA.import_from_dict method."""
+        rds = RDS_DATA()
+        data = {
+            "RDS_SIGNATURE": "ABC 123",
+            "RDS_STATUS": "available",
+            "RDS_LOCATION": "Floor 1",
+        }
+        result = rds.import_from_dict(data)
+        assert result.RDS_SIGNATURE == "ABC 123"
+        assert result.RDS_STATUS == "available"
+        assert result.RDS_LOCATION == "Floor 1"
+
+
+# --- RDS_AVAIL_DATA dataclass tests ---
+
+
+class TestRDSAvailData:
+    """Tests for the RDS_AVAIL_DATA dataclass."""
+
+    def test_rds_avail_data_creation_defaults(self):
+        """Test RDS_AVAIL_DATA creation with defaults."""
+        rds = RDS_AVAIL_DATA()
+        assert rds.library_sigil == ""
+        assert rds.items == []
+
+    def test_rds_avail_data_import_from_dict(self):
+        """Test RDS_AVAIL_DATA.import_from_dict method."""
+        rds = RDS_AVAIL_DATA()
+        json_data = (
+            '{"DE-Frei129": {"Location1": {"items": [{"status": "available"}]}}}'
+        )
+        result = rds.import_from_dict(json_data)
+        assert result.library_sigil == "DE-Frei129"
+        assert len(result.items) == 1
+
+
+# --- RDS_GENERIC_DATA dataclass tests ---
+
+
+class TestRDSGenericData:
+    """Tests for the RDS_GENERIC_DATA dataclass."""
+
+    def test_rds_generic_data_creation_defaults(self):
+        """Test RDS_GENERIC_DATA creation with defaults."""
+        rds = RDS_GENERIC_DATA()
+        assert rds.LibrarySigil == ""
+        assert rds.RDS_DATA == []
+
+    def test_rds_generic_data_import_from_dict(self):
+        """Test RDS_GENERIC_DATA.import_from_dict method."""
+        rds = RDS_GENERIC_DATA()
+        json_data = '{"DE-Frei129": [{"RDS_SIGNATURE": "ABC 123"}]}'
+        result = rds.import_from_dict(json_data)
+        assert result.LibrarySigil == "DE-Frei129"
+        assert len(result.RDS_DATA) == 1
+
+
+# --- ARRAYData tests ---
+
+
+class TestARRAYData:
+    """Tests for the ARRAYData transformer."""
+
+    def test_array_data_transform(self):
+        """Test ARRAYData transform method."""
+        sample_data = """
+        [kid] => 123456789
+        [ti_long] => Array
+        (
+            [0] => Test Book Title
+        )
+        [isbn] => Array
+        (
+            [0] => 9783123456789
+        )
+        [la_facet] => Array
+        (
+            [0] => German
+        )
+        [pu] => Array
+        (
+            [0] => Test Publisher
+        )
+        [py_display] => Array
+        (
+            [0] => 2023
+        )
+        [umfang] => Array
+        (
+            [0] => 300 pages
+        )
+        """
+        transformer = ARRAYData()
+        result = transformer.transform(sample_data)
+
+        assert isinstance(result, BookData)
+        assert result.ppn == "123456789"
+
+    def test_array_data_with_signature(self):
+        """Test ARRAYData with predefined signature."""
+        sample_data = "[kid] => 123456789"
+        transformer = ARRAYData(signature="ABC 123")
+        result = transformer.transform(sample_data)
+
+        assert isinstance(result, BookData)
+
+
+# --- COinSData tests ---
+
+
+class TestCOinSData:
+    """Tests for the COinSData transformer."""
+
+    def test_coins_data_transform(self):
+        """Test COinSData transform method."""
+        # Note: COinS format uses & separators, last field shouldn't have trailing &
+        sample_data = (
+            "ctx_ver=Z39.88-2004&"
+            "rft_id=info:sid/test?kid=123456&"
+            "rft.btitle=Test Bookrft&"  # btitle ends parsing at next 'rft'
+            "rft.aulast=Smithrft&"
+            "rft.aufirst=Johnrft&"
+            "rft.edition=2ndrft&"
+            "rft.isbn=9783123456789rft&"
+            "rft.pub=Publisherrft&"
+            "rft.date=2023rft&"
+            "rft.tpages=300"
+        )
+        transformer = COinSData()
+        result = transformer.transform(sample_data)
+
+        assert isinstance(result, BookData)
+        # The transformer splits on 'rft' after the field value
+        assert "Test Book" in result.title
+        assert "Smith" in result.author
+
+
+# --- RISData tests ---
+
+
+class TestRISData:
+    """Tests for the RISData transformer."""
+
+    def test_ris_data_transform(self):
+        """Test RISData transform method."""
+        sample_data = """TY  - BOOK
+TI  - Test Book Title
+AU  - Smith, John
+ET  - 2nd edition
+CN  - ABC 123
+SN  - 9783123456789
+LA  - English
+PB  - Test Publisher
+PY  - 2023
+SP  - 300
+DP  - https://example.com/book?kid=123456
+ER  -"""
+        transformer = RISData()
+        result = transformer.transform(sample_data)
+
+        assert isinstance(result, BookData)
+        assert result.title == "Test Book Title"
+        assert result.signature == "ABC 123"
+        assert result.edition == "2nd edition"
+        assert result.year == "2023"
+
+
+# --- BibTeXData tests ---
+
+
+class TestBibTeXData:
+    """Tests for the BibTeXData transformer."""
+
+    def test_bibtex_data_transform(self):
+        """Test BibTeXData transform method."""
+        sample_data = """@book{test2023,
+  title = {Test Book Title},
+  author = {Smith, John and Doe, Jane},
+  edition = {2nd},
+  isbn = {9783123456789},
+  language = {English},
+  publisher = {Test Publisher},
+  year = {2023},
+  pages = {300},
+  bestand = {ABC 123}
+}"""
+        transformer = BibTeXData()
+        result = transformer.transform(sample_data)
+
+        assert isinstance(result, BookData)
+        assert result.title == "Test Book Title"
+        # BibTeX transformer joins with ; and removes commas
+        assert "Smith John" in result.author
+        assert "Doe Jane" in result.author
+        assert result.signature == "ABC 123"
+
+
+# --- DictToTable tests ---
+
+
+class TestDictToTable:
+    """Tests for the DictToTable transformer."""
+
+    def test_dict_to_table_book_mode(self):
+        """Test DictToTable with book mode."""
+        data = {
+            "mode": "book",
+            "book_author": "Smith, John",
+            "book_signature": "ABC 123",
+            "book_place": "Berlin",
+            "book_year": "2023",
+            "book_title": "Test Book",
+            "book_edition": "2nd",
+            "book_pages": "300",
+            "book_publisher": "Publisher",
+            "book_isbn": "9783123456789",
+        }
+        transformer = DictToTable()
+        result = transformer.transform(data)
+
+        assert result["type"] == "book"
+        assert result["work_author"] == "Smith, John"
+        assert result["signature"] == "ABC 123"
+        assert result["year"] == "2023"
+
+    def test_dict_to_table_hg_mode(self):
+        """Test DictToTable with hg (editor) mode."""
+        data = {
+            "mode": "hg",
+            "hg_author": "Chapter Author",
+            "hg_editor": "Editor Name",
+            "hg_year": "2023",
+            "hg_title": "Collection Title",
+            "hg_publisher": "Publisher",
+            "hg_place": "Berlin",
+            "hg_edition": "1st",
+            "hg_chaptertitle": "Chapter Title",
+            "hg_pages": "50-75",
+            "hg_signature": "ABC 123",
+            "hg_isbn": "9783123456789",
+        }
+        transformer = DictToTable()
+        result = transformer.transform(data)
+
+        assert result["type"] == "hg"
+        assert result["section_author"] == "Chapter Author"
+        assert result["work_author"] == "Editor Name"
+        assert result["chapter_title"] == "Chapter Title"
+
+    def test_dict_to_table_zs_mode(self):
+        """Test DictToTable with zs (journal) mode."""
+        data = {
+            "mode": "zs",
+            "zs_author": "Article Author",
+            "zs_chapter_title": "Article Title",
+            "zs_place": "Berlin",
+            "zs_issue": "Vol. 5, No. 2",
+            "zs_pages": "100-120",
+            "zs_publisher": "Publisher",
+            "zs_isbn": "1234-5678",
+            "zs_year": "2023",
+            "zs_signature": "PER 123",
+            "zs_title": "Journal Name",
+        }
+        transformer = DictToTable()
+        result = transformer.transform(data)
+
+        assert result["type"] == "zs"
+        assert result["section_author"] == "Article Author"
+        assert result["chapter_title"] == "Article Title"
+        assert result["issue"] == "Vol. 5, No. 2"
+
+    def test_dict_to_table_reset(self):
+        """Test DictToTable reset method."""
+        transformer = DictToTable()
+        transformer.work_author = "Test"
+        transformer.year = "2023"
+
+        transformer.reset()
+
+        assert transformer.work_author is None
+        assert transformer.year is None
+
+    def test_dict_to_table_make_result_excludes_none(self):
+        """Test that makeResult excludes None values."""
+        transformer = DictToTable()
+        transformer.work_author = "Test Author"
+        transformer.year = "2023"
+        # Leave others as None
+
+        result = transformer.makeResult()
+
+        assert "work_author" in result
+        assert "year" in result
+        assert "section_author" not in result  # Should be excluded
+        assert "pages" not in result  # Should be excluded
+
+    def test_dict_to_table_invalid_mode(self):
+        """Test DictToTable with invalid mode returns None."""
+        data = {"mode": "invalid"}
+        transformer = DictToTable()
+        result = transformer.transform(data)
+
+        assert result is None

tests/test_webrequest.py

@@ -0,0 +1,309 @@
+"""Tests for the webrequest module."""
+
+from unittest.mock import MagicMock, patch
+
+import pytest
+import requests
+
+from src.bibapi.webrequest import (
+    ALLOWED_IPS,
+    BibTextTransformer,
+    TransformerType,
+    WebRequest,
+    cover,
+    get_content,
+)
+
+
+class TestTransformerType:
+    """Tests for TransformerType enum."""
+
+    def test_transformer_type_values(self):
+        """Test TransformerType enum values."""
+        assert TransformerType.ARRAY.value == "ARRAY"
+        assert TransformerType.COinS.value == "COinS"
+        assert TransformerType.BibTeX.value == "BibTeX"
+        assert TransformerType.RIS.value == "RIS"
+        assert TransformerType.RDS.value == "RDS"
+
+
+class TestWebRequest:
+    """Tests for WebRequest class."""
+
+    def test_webrequest_init_not_allowed_ip(self):
+        """Test WebRequest raises PermissionError for non-allowed IP."""
+        with patch("requests.get") as mock_get:
+            mock_response = MagicMock()
+            mock_response.text = "192.168.1.1"  # Not in ALLOWED_IPS
+            mock_get.return_value = mock_response
+
+            with pytest.raises(PermissionError, match="IP not allowed"):
+                WebRequest()
+
+    def test_webrequest_init_allowed_ip(self):
+        """Test WebRequest initializes successfully with allowed IP."""
+        with patch("requests.get") as mock_get:
+            mock_response = MagicMock()
+            mock_response.text = ALLOWED_IPS[0]  # Use first allowed IP
+            mock_get.return_value = mock_response
+
+            wr = WebRequest()
+            assert wr.public_ip == ALLOWED_IPS[0]
+            assert wr.timeout == 5
+            assert wr.use_any is False
+
+    def test_webrequest_no_connection(self):
+        """Test WebRequest raises ConnectionError when no internet."""
+        with patch("requests.get") as mock_get:
+            mock_get.side_effect = requests.exceptions.RequestException("No connection")
+
+            with pytest.raises(ConnectionError, match="No internet connection"):
+                WebRequest()
+
+    def test_webrequest_use_any_book(self):
+        """Test use_any_book property."""
+        with patch("requests.get") as mock_get:
+            mock_response = MagicMock()
+            mock_response.text = ALLOWED_IPS[0]
+            mock_get.return_value = mock_response
+
+            wr = WebRequest()
+            result = wr.use_any_book
+            assert result.use_any is True
+
+    def test_webrequest_set_apparat(self):
+        """Test set_apparat method."""
+        with patch("requests.get") as mock_get:
+            mock_response = MagicMock()
+            mock_response.text = ALLOWED_IPS[0]
+            mock_get.return_value = mock_response
+
+            wr = WebRequest()
+            result = wr.set_apparat(5)
+            assert result.apparat == "05"  # Padded with 0
+
+            result = wr.set_apparat(15)
+            assert result.apparat == 15  # Not padded
+
+    def test_webrequest_get_ppn(self):
+        """Test get_ppn method."""
+        with patch("requests.get") as mock_get:
+            mock_response = MagicMock()
+            mock_response.text = ALLOWED_IPS[0]
+            mock_get.return_value = mock_response
+
+            wr = WebRequest()
+
+            # Normal signature
+            result = wr.get_ppn("ABC 123")
+            assert result.ppn == "ABC 123"
+            assert result.signature == "ABC 123"
+
+            # Signature with +
+            result = wr.get_ppn("ABC+123")
+            assert result.ppn == "ABC%2B123"
+
+            # DOI
+            result = wr.get_ppn("https://doi.org/10.1234/test")
+            assert result.ppn == "test"
+
+    def test_webrequest_search_book(self):
+        """Test search_book method."""
+        with patch("requests.get") as mock_get:
+            # First call for IP check
+            ip_response = MagicMock()
+            ip_response.text = ALLOWED_IPS[0]
+
+            # Second call for actual search
+            search_response = MagicMock()
+            search_response.text = "<html>results</html>"
+
+            mock_get.side_effect = [ip_response, search_response]
+
+            wr = WebRequest()
+            result = wr.search_book("test search")
+            assert result == "<html>results</html>"
+
+    def test_webrequest_search_ppn(self):
+        """Test search_ppn method."""
+        with patch("requests.get") as mock_get:
+            ip_response = MagicMock()
+            ip_response.text = ALLOWED_IPS[0]
+
+            ppn_response = MagicMock()
+            ppn_response.text = "<html>ppn result</html>"
+
+            mock_get.side_effect = [ip_response, ppn_response]
+
+            wr = WebRequest()
+            result = wr.search_ppn("123456")
+            assert result == "<html>ppn result</html>"
+
+    def test_webrequest_search(self):
+        """Test search method."""
+        with patch("requests.get") as mock_get:
+            ip_response = MagicMock()
+            ip_response.text = ALLOWED_IPS[0]
+
+            search_response = MagicMock()
+            search_response.text = "<html>detail page</html>"
+
+            mock_get.side_effect = [ip_response, search_response]
+
+            wr = WebRequest()
+            result = wr.search("https://example.com/book")
+            assert result == "<html>detail page</html>"
+
+    def test_webrequest_search_error(self):
+        """Test search method handles errors."""
+        with patch("requests.get") as mock_get:
+            ip_response = MagicMock()
+            ip_response.text = ALLOWED_IPS[0]
+
+            mock_get.side_effect = [ip_response, requests.exceptions.RequestException()]
+
+            wr = WebRequest()
+            result = wr.search("https://example.com/book")
+            assert result is None
+
+    def test_webrequest_get_book_links(self):
+        """Test get_book_links method."""
+        html = """<html>
+        <a class="title getFull" href="/opac/book/123">Book 1</a>
+        <a class="title getFull" href="/opac/book/456">Book 2</a>
+        </html>"""
+
+        with patch("requests.get") as mock_get:
+            ip_response = MagicMock()
+            ip_response.text = ALLOWED_IPS[0]
+
+            search_response = MagicMock()
+            search_response.text = html
+
+            mock_get.side_effect = [ip_response, search_response]
+
+            wr = WebRequest()
+            wr.ppn = "test"
+            links = wr.get_book_links("test")
+
+            assert len(links) == 2
+            assert "https://rds.ibs-bw.de/opac/book/123" in links[0]
+
+
+class TestBibTextTransformer:
+    """Tests for BibTextTransformer class."""
+
+    def test_bibtexttransformer_init_valid_mode(self):
+        """Test BibTextTransformer initialization with valid mode."""
+        bt = BibTextTransformer(TransformerType.ARRAY)
+        assert bt.mode == "ARRAY"
+
+    def test_bibtexttransformer_init_default_mode(self):
+        """Test BibTextTransformer uses ARRAY as default mode."""
+        bt = BibTextTransformer()
+        assert bt.mode == "ARRAY"
+
+    def test_bibtexttransformer_invalid_mode(self):
+        """Test BibTextTransformer raises error for invalid mode."""
+
+        # Create a fake invalid mode
+        class FakeMode:
+            value = "INVALID"
+
+        with pytest.raises(ValueError, match="not valid"):
+            BibTextTransformer(FakeMode())
+
+    def test_bibtexttransformer_use_signature(self):
+        """Test use_signature method."""
+        bt = BibTextTransformer()
+        result = bt.use_signature("ABC 123")
+        assert result.signature == "ABC 123"
+
+    def test_bibtexttransformer_get_data_none(self):
+        """Test get_data with None input."""
+        bt = BibTextTransformer()
+        result = bt.get_data(None)
+        assert result.data is None
+
+    def test_bibtexttransformer_get_data_ris(self):
+        """Test get_data with RIS format."""
+        bt = BibTextTransformer(TransformerType.RIS)
+        data = ["Some data", "TY  - BOOK\nTI  - Test"]
+        result = bt.get_data(data)
+        assert "TY  -" in result.data
+
+    def test_bibtexttransformer_get_data_array(self):
+        """Test get_data with ARRAY format."""
+        bt = BibTextTransformer(TransformerType.ARRAY)
+        data = ["Some data", "[kid] => 123456"]
+        result = bt.get_data(data)
+        assert "[kid]" in result.data
+
+    def test_bibtexttransformer_get_data_coins(self):
+        """Test get_data with COinS format."""
+        bt = BibTextTransformer(TransformerType.COinS)
+        data = ["Some data", "ctx_ver=Z39.88"]
+        result = bt.get_data(data)
+        assert "ctx_ver" in result.data
+
+    def test_bibtexttransformer_get_data_bibtex(self):
+        """Test get_data with BibTeX format."""
+        bt = BibTextTransformer(TransformerType.BibTeX)
+        data = ["Some data", "@book{test2023,"]
+        result = bt.get_data(data)
+        assert "@book" in result.data
+
+    def test_bibtexttransformer_get_data_rds(self):
+        """Test get_data with RDS format."""
+        bt = BibTextTransformer(TransformerType.RDS)
+        data = ["Some data", "RDS ---------------------------------- test"]
+        result = bt.get_data(data)
+        assert "RDS" in result.data
+
+    def test_bibtexttransformer_return_data_none(self):
+        """Test return_data when data is None."""
+        bt = BibTextTransformer()
+        bt.get_data(None)
+        result = bt.return_data()
+        assert result is None
+
+
+class TestCoverFunction:
+    """Tests for the cover function."""
+
+    def test_cover_returns_content(self):
+        """Test cover function returns image content."""
+        with patch("requests.get") as mock_get:
+            mock_response = MagicMock()
+            mock_response.content = b"fake_image_content"
+            mock_get.return_value = mock_response
+
+            result = cover("9783123456789")
+            assert result == b"fake_image_content"
+
+    def test_cover_url_format(self):
+        """Test cover function calls correct URL."""
+        with patch("requests.get") as mock_get:
+            mock_response = MagicMock()
+            mock_response.content = b""
+            mock_get.return_value = mock_response
+
+            cover("9783123456789")
+
+            called_url = mock_get.call_args[0][0]
+            assert "9783123456789" in called_url
+            assert "buchhandel.de/cover" in called_url
+
+
+class TestGetContentFunction:
+    """Tests for the get_content function."""
+
+    def test_get_content(self):
+        """Test get_content extracts text from div."""
+        from bs4 import BeautifulSoup
+
+        html = '<html><div class="test-class">  Content Here  </div></html>'
+        soup = BeautifulSoup(html, "html.parser")
+
+        result = get_content(soup, "test-class")
+        assert result == "Content Here"