Add tests to BaseProvider class (#2024)

* Add tests to the base provider class

* Fix flake8

Author: francbartoli

tests/conftest.py

@@ -3,6 +3,7 @@
 # Authors: Bernhard Mallinger <bernhard.mallinger@eox.at>
 #
 # Copyright (c) 2024 Bernhard Mallinger
+# Copyright (c) 2025 Francesco Bartoli
 #
 # Permission is hereby granted, free of charge, to any person
 # obtaining a copy of this software and associated documentation
@@ -26,10 +27,14 @@
 # OTHER DEALINGS IN THE SOFTWARE.
 #
 # =================================================================
+import io
+import json
+import sys
 
 import pytest
 
 from pygeoapi.api import API
+from pygeoapi.provider.base import BaseProvider, ProviderItemNotFoundError
 from pygeoapi.util import yaml_load
 
 from tests.util import get_test_file_path
@@ -50,3 +55,99 @@ def openapi():
 @pytest.fixture()
 def api_(config, openapi):
     return API(config, openapi)
+
+
+@pytest.fixture
+def basic_provider_def():
+    """Basic provider definition for testing."""
+    return {
+        "name": "test_provider",
+        "type": "feature",
+        "data": "/path/to/data.geojson"
+    }
+
+
+@pytest.fixture
+def extended_provider_def():
+    """Extended provider definition with all optional fields."""
+    return {
+        "name": "test_provider",
+        "type": "feature",
+        "data": "/path/to/data.geojson",
+        "editable": True,
+        "options": {"some_option": "value"},
+        "id_field": "feature_id",
+        "uri_field": "uri",
+        "x_field": "longitude",
+        "y_field": "latitude",
+        "time_field": "timestamp",
+        "title_field": "title",
+        "properties": ["prop1", "prop2"],
+        "file_types": [".geojson", ".json"]
+    }
+
+
+@pytest.fixture
+def basic_provider(basic_provider_def):
+    """Basic BaseProvider instance."""
+    return BaseProvider(basic_provider_def)
+
+
+@pytest.fixture
+def extended_provider(extended_provider_def):
+    """Extended BaseProvider instance."""
+    return BaseProvider(extended_provider_def)
+
+
+@pytest.fixture
+def mock_provider_with_get():
+    """Mock provider that implements get() method."""
+    class MockProvider(BaseProvider):
+        def get(self, identifier, **kwargs):
+            if identifier == "mock_id":
+                return {"type": "Feature", "id": identifier}
+            else:
+                raise ProviderItemNotFoundError("Not found")
+
+    provider_def = {
+        "name": "mock_provider",
+        "type": "feature",
+        "data": "/path/to/data.geojson"
+    }
+    return MockProvider(provider_def)
+
+
+@pytest.fixture
+def valid_geojson_item():
+    """Valid GeoJSON item for testing."""
+    return json.dumps({
+        "type": "Feature",
+        "id": "test_id",
+        "geometry": {"type": "Point", "coordinates": [0, 0]},
+        "properties": {"name": "Test Feature"}
+    })
+
+
+@pytest.fixture
+def geojson_item_with_props_id():
+    """GeoJSON item with identifier in properties."""
+    return json.dumps({
+        "type": "Feature",
+        "geometry": {"type": "Point", "coordinates": [0, 0]},
+        "properties": {"identifier": "props_id", "name": "Test"}
+    })
+
+
+@pytest.fixture
+def remove_stdout():
+    """Fixture to remove standard output during tests."""
+    class RemoveStdout:
+        def __enter__(self):
+            self.original_stdout = sys.stdout
+            sys.stdout = io.StringIO()
+            return self
+
+        def __exit__(self, exc_type, exc_val, exc_tb):
+            sys.stdout = self.original_stdout
+
+    return RemoveStdout