FEAT: Modernized to support latest Pythons and DRF JSONAPI

tests/test_pagination.py

@@ -0,0 +1,56 @@
+from types import SimpleNamespace
+
+from enhanced_drf_jsonapi.pagination import NgxJsonApiPageNumberPagination
+
+
+def make_page(*, number, pages, count, per_page, next_page=None, previous_page=None):
+    return SimpleNamespace(
+        number=number,
+        paginator=SimpleNamespace(num_pages=pages, count=count, per_page=per_page),
+        has_next=lambda: next_page is not None,
+        has_previous=lambda: previous_page is not None,
+        next_page_number=lambda: next_page,
+        previous_page_number=lambda: previous_page,
+    )
+
+
+def test_pagination_response_preserves_ngx_jsonapi_contract():
+    pagination = NgxJsonApiPageNumberPagination()
+    pagination.page = make_page(
+        number=2,
+        pages=4,
+        count=37,
+        per_page=10,
+        next_page=3,
+        previous_page=1,
+    )
+    pagination.build_link = lambda page: None if page is None else f"/items?page={page}"
+
+    response = pagination.get_paginated_response([{"id": "one"}])
+
+    assert response.data == {
+        "results": [{"id": "one"}],
+        "meta": {
+            "page": 2,
+            "pages": 4,
+            "total_resources": 37,
+            "resources_per_page": 10,
+        },
+        "links": {
+            "first": "/items?page=1",
+            "last": "/items?page=4",
+            "next": "/items?page=3",
+            "prev": "/items?page=1",
+        },
+    }
+
+
+def test_pagination_uses_null_links_at_the_boundaries():
+    pagination = NgxJsonApiPageNumberPagination()
+    pagination.page = make_page(number=1, pages=1, count=0, per_page=25)
+    pagination.build_link = lambda page: None if page is None else f"/items?page={page}"
+
+    response = pagination.get_paginated_response([])
+
+    assert response.data["links"]["next"] is None
+    assert response.data["links"]["prev"] is None