features/steps/tdd_gemini_fallback_order_4750_steps.py

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+"""Step definitions for TDD test: ProviderType.GEMINI missing from FALLBACK_ORDER.
+
+Issue: #4750 — ProviderType.GEMINI missing from ProviderRegistry.FALLBACK_ORDER
+TDD Issue: #10896
+
+This test captures the bug: when only GEMINI_API_KEY is set (without GOOGLE_API_KEY),
+get_default_provider_type() returns None instead of ProviderType.GEMINI because
+GEMINI is absent from FALLBACK_ORDER.
+
+The @tdd_expected_fail tag inverts the result so CI passes while the bug exists.
+Once the fix is applied (adding ProviderType.GEMINI to FALLBACK_ORDER), the
+@tdd_expected_fail tag must be removed and the test must pass normally.
+"""
+
+from __future__ import annotations
+
+import os
+from typing import Any
+from unittest.mock import MagicMock
+
+from behave import given, then, when  # type: ignore[import-untyped]
+
+from cleveragents.providers.registry import ProviderRegistry, ProviderType
+
+
+def _make_gemini_only_settings() -> Any:
+    """Return a fake Settings-like object with only gemini_api_key set."""
+    settings = MagicMock()
+    settings.openai_api_key = None
+    settings.anthropic_api_key = None
+    settings.google_api_key = None
+    settings.gemini_api_key = "sk-gemini-test-key"
+    settings.azure_api_key = None
+    settings.openrouter_api_key = None
+    settings.cohere_api_key = None
+    settings.groq_api_key = None
+    settings.together_api_key = None
+    settings.default_provider = None
+    settings.default_model = None
+    settings.azure_openai_endpoint = None
+    settings.azure_openai_api_version = None
+    settings.azure_openai_deployment = None
+    settings.openrouter_organization = None
+    return settings
+
+
+@given("a ProviderRegistry configured with only gemini_api_key set")
+def step_tdd_registry_gemini_only(context: Any) -> None:
+    context.tdd_registry = ProviderRegistry(settings=_make_gemini_only_settings())
+
+
+@given("CLEVERAGENTS_DEFAULT_PROVIDER is not set for tdd test")
+def step_tdd_unset_default_provider(context: Any) -> None:
+    context.original_provider_env = os.environ.get("CLEVERAGENTS_DEFAULT_PROVIDER")
+    os.environ.pop("CLEVERAGENTS_DEFAULT_PROVIDER", None)
+
+
+@when("I call get_default_provider_type on the tdd registry")
+def step_tdd_call_get_default_provider_type(context: Any) -> None:
+    context.tdd_result = context.tdd_registry.get_default_provider_type()
+
+
+@then("the tdd result should be ProviderType.GEMINI")
+def step_tdd_result_should_be_gemini(context: Any) -> None:
+    assert context.tdd_result == ProviderType.GEMINI, (
+        f"Expected ProviderType.GEMINI but got {context.tdd_result!r}. "
+        f"Bug: ProviderType.GEMINI is missing from ProviderRegistry.FALLBACK_ORDER. "
+        f"When only GEMINI_API_KEY is set, get_default_provider_type() returns None "
+        f"instead of ProviderType.GEMINI."
+    )

features/tdd_gemini_fallback_order_4750.feature

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+Feature: TDD: ProviderType.GEMINI missing from ProviderRegistry.FALLBACK_ORDER
+  As a user who configures only GEMINI_API_KEY
+  I want get_default_provider_type() to return ProviderType.GEMINI via the fallback chain
+  So that Gemini-only users can use auto-discovery without setting GOOGLE_API_KEY
+
+  @tdd_issue @tdd_issue_4750 @tdd_expected_fail
+  Scenario: Gemini-only user gets GEMINI as default provider via fallback order
+    Given a ProviderRegistry configured with only gemini_api_key set
+    And CLEVERAGENTS_DEFAULT_PROVIDER is not set for tdd test
+    When I call get_default_provider_type on the tdd registry
+    Then the tdd result should be ProviderType.GEMINI