Test if multiple prefixes for the same IRI persist in a namespace manager

test/test_namespace/test_parser_namespace.py

@@ -0,0 +1,117 @@
+"""
+This module contains tests for the parsing a turtle graph and check the namespace
+handling.
+"""
+
+from dataclasses import dataclass
+from typing import Any, Iterator
+
+import pytest
+from _pytest.mark.structures import ParameterSet
+
+from rdflib import ConjunctiveGraph, Graph, URIRef
+from rdflib.namespace import Namespace, NamespaceManager
+
+
+def make_parser_namespace_tests() -> Iterator[ParameterSet]:
+    @dataclass
+    class Case:
+        format_name: str
+        data_string: str
+        graph_class: Any
+
+    cases = [
+        Case(
+            "ntriples",
+            """
+            <http://example.org/a> <http://example.org/b> <http://example.org/c> .
+            """,
+            Graph,
+        ),
+        Case(
+            "nquads",
+            """
+            <http://example.org/a> <http://example.org/b> <http://example.org/c> <http://example.org/g> .
+            """,
+            ConjunctiveGraph,
+        ),
+        Case(
+            "turtle",
+            """
+            @prefix ns1: <https://example.org/namespaces/testexample/> .
+            @prefix ex: <http://example.org/> .
+            ex:a ex:b ex:c .
+            """,
+            Graph,
+        ),
+        Case(
+            "trig",
+            """
+            @prefix ns1: <https://example.org/namespaces/testexample/> .
+            @prefix ex: <http://example.org/> .
+            graph ex:g {
+                ex:a ex:b ex:c .
+            }
+            """,
+            ConjunctiveGraph,
+        ),
+        Case(
+            "n3",
+            """
+            @prefix ns1: <https://example.org/namespaces/testexample/> .
+            @prefix ex: <http://example.org/> .
+            ex:a ex:b ex:c .
+            """,
+            Graph,
+        ),
+    ]
+
+    for case in cases:
+        yield pytest.param(case.format_name, case.data_string, case.graph_class)
+
+
+@pytest.mark.parametrize(
+    ["format_name", "data_string", "graph_class"],
+    make_parser_namespace_tests(),
+)
+def test_literals(
+    format_name: str,
+    data_string: str,
+    graph_class,
+) -> None:
+    """
+    Setup a namespace manager, parse a file, assert that the original namespaces are still set.
+    """
+    namespaces = NamespaceManager(graph_class())
+    namespaces.bind(
+        "testexample", Namespace("https://example.org/namespaces/testexample/")
+    )
+    g = graph_class()
+    g.namespace_manager = namespaces
+    g.parse(data=data_string, format=format_name)
+    all_ns = [n for n in g.namespace_manager.namespaces()]
+
+    assert (
+        "testexample",
+        URIRef("https://example.org/namespaces/testexample/"),
+    ) in all_ns
+
+
+def test_namespacemanager() -> None:
+    """
+    Setup a namespace manager add two prefixes for the same IRI.
+    """
+    namespaces = NamespaceManager(Graph())
+    namespaces.bind(
+        "testexample", Namespace("https://example.org/namespaces/testexample/")
+    )
+    namespaces.bind("test", Namespace("https://example.org/namespaces/testexample/"))
+    all_ns = [n for n in namespaces.namespaces()]
+    assert (
+        "testexample",
+        URIRef("https://example.org/namespaces/testexample/"),
+    ) in all_ns
+    assert (
+        "test",
+        URIRef("https://example.org/namespaces/testexample/"),
+    ) in all_ns