test: add coverage for lazy provider factory functions

Author: xfgong

tests/providers/test_init.py

@@ -0,0 +1,19 @@
+from cubepi.providers import (
+    get_anthropic_provider,
+    get_openai_provider,
+    get_openai_responses_provider,
+)
+
+
+class TestLazyProviderFactories:
+    def test_get_anthropic_provider(self):
+        cls = get_anthropic_provider()
+        assert cls.__name__ == "AnthropicProvider"
+
+    def test_get_openai_provider(self):
+        cls = get_openai_provider()
+        assert cls.__name__ == "OpenAIProvider"
+
+    def test_get_openai_responses_provider(self):
+        cls = get_openai_responses_provider()
+        assert cls.__name__ == "OpenAIResponsesProvider"