initial tests

tests/conftest.py

@@ -0,0 +1,56 @@
+"""
+Shared test fixtures and config.
+
+Fixtures defined here available to all tests
+"""
+
+from statistics import mode
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+from anthropic.types import ContentBlock, Message, TextBlock, Usage
+
+from agent.config import Settings
+
+
+@pytest.fixture
+def settings():
+    """provide test settings don't load from .env"""
+    return Settings(
+        anthropic_api_key="test-key-12345",
+        model="claude-test-model",
+        max_tokens=100,
+        safedir="./test-workspace",
+    )
+
+
+@pytest.fixture
+def mock_anthropic_client():
+    """Mock anthropic client that returns a fake response."""
+    mock_client = AsyncMock()
+
+    # create a realistic fake response
+    fake_message = Message(
+        id="msg_test123",
+        type="message",
+        role="assistant",
+        content=[TextBlock(type="text", text="42")],
+        model="claude-test-model",
+        stop_reason="end_turn",
+        usage=Usage(input_tokens=10, output_tokens=5),
+    )
+
+    # make messages.create() return this fake message
+    mock_client.messages.create = AsyncMock(return_value=fake_message)
+
+    return mock_client
+
+
+@pytest.fixture
+def sample_history():
+    """sample conversation history for testing"""
+    return [
+        {"role": "user", "content": "Hello"},
+        {"role": "assistance", "content": "Hi there!"},
+        {"role": "user", "content": "What's 2+2?"},
+    ]