test: Add tests for provider data fetching and fallback

- Add test for timeout scenario
- Add test for wrong content type
- Add test for fallback to default providers

Part of #2116

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/cli/provider_test.py

@@ -0,0 +1,29 @@
+import pytest
+from unittest.mock import patch, Mock
+import requests
+from crewai.cli.provider import fetch_provider_data, get_provider_data
+from crewai.cli.constants import JSON_URL, PROVIDERS, MODELS
+
+def test_fetch_provider_data_timeout():
+    with patch('requests.get') as mock_get:
+        mock_get.side_effect = requests.exceptions.Timeout
+        result = fetch_provider_data('/tmp/cache.json')
+        assert result is None
+
+def test_fetch_provider_data_wrong_content_type():
+    with patch('requests.get') as mock_get:
+        mock_response = Mock()
+        mock_response.headers = {'content-type': 'text/plain'}
+        mock_get.return_value = mock_response
+        result = fetch_provider_data('/tmp/cache.json')
+        assert result is None
+
+def test_get_provider_data_fallback():
+    with patch('crewai.cli.provider.load_provider_data') as mock_load:
+        mock_load.return_value = None
+        result = get_provider_data()
+        assert result is not None
+        assert all(provider.lower() in result for provider in PROVIDERS)
+        # Verify that each provider has its models from MODELS
+        for provider in PROVIDERS:
+            assert result[provider.lower()] == MODELS.get(provider.lower(), [])