test: implement basic test for grouped pagination behavior

tests/tests_adapter/test_adapter_grouped_pagination.py

@@ -0,0 +1,107 @@
+"""Basic tests for rdfproxy.SPARQLModelAdapter pagination with grouped models."""
+
+from typing import Any, NamedTuple
+
+import pytest
+
+from pydantic import BaseModel, ConfigDict
+from rdfproxy import Page, SPARQLModelAdapter
+
+
+query = """
+select ?parent ?child ?name
+where {
+    values (?parent ?child ?name) {
+        ('x' 'c' 'foo')
+        ('y' 'd' UNDEF)
+        ('y' 'e' UNDEF)
+        ('z' UNDEF UNDEF)
+    }
+}
+"""
+
+
+class Child(BaseModel):
+    name: str | None = None
+
+
+class Parent(BaseModel):
+    model_config = ConfigDict(group_by="parent")
+
+    parent: str
+    children: list[Child]
+
+
+parent_adapter = SPARQLModelAdapter(
+    target="https://graphdb.r11.eu/repositories/RELEVEN",
+    query=query,
+    model=Parent,
+)
+
+
+class AdapterParameter(NamedTuple):
+    adapter: SPARQLModelAdapter
+    query_parameters: dict[str, Any]
+    expected: Page
+
+
+adapter_parameters = [
+    AdapterParameter(
+        adapter=parent_adapter,
+        query_parameters={"page": 1, "size": 2},
+        expected=Page[Parent](
+            items=[
+                {"parent": "x", "children": [{"name": "foo"}]},
+                {"parent": "y", "children": []},
+            ],
+            page=1,
+            size=2,
+            total=3,
+            pages=2,
+        ),
+    ),
+    AdapterParameter(
+        adapter=parent_adapter,
+        query_parameters={"page": 2, "size": 2},
+        expected=Page[Parent](
+            items=[{"parent": "z", "children": []}],
+            page=2,
+            size=2,
+            total=3,
+            pages=2,
+        ),
+    ),
+    AdapterParameter(
+        adapter=parent_adapter,
+        query_parameters={"page": 1, "size": 1},
+        expected=Page[Parent](
+            items=[{"parent": "x", "children": [{"name": "foo"}]}],
+            page=1,
+            size=1,
+            total=3,
+            pages=3,
+        ),
+    ),
+    AdapterParameter(
+        adapter=parent_adapter,
+        query_parameters={"page": 2, "size": 1},
+        expected=Page[Parent](
+            items=[{"parent": "y", "children": []}], page=2, size=1, total=3, pages=3
+        ),
+    ),
+    AdapterParameter(
+        adapter=parent_adapter,
+        query_parameters={"page": 3, "size": 1},
+        expected=Page[Parent](
+            items=[{"parent": "z", "children": []}], page=3, size=1, total=3, pages=3
+        ),
+    ),
+]
+
+
+@pytest.mark.remote
+@pytest.mark.parametrize(
+    ["adapter", "query_parameters", "expected"], adapter_parameters
+)
+def test_basic_adapter_grouped_pagination(adapter, query_parameters, expected):
+    assert adapter.query(**query_parameters) == expected