# Comprehensive Unit Tests for Agent Module Changes
This document summarizes the comprehensive unit tests created for the changes in the agent module.
## Test Files Created
### 1. `tests/unit/test_agent_cli.py`
**Purpose:** Tests for `agent/cli.py` including CLI functionality and agent building.
**Test Classes:**
- `TestBuildAgent`: Tests the `build_agent()` function
- Provider selection (echo, openai, ollama)
- Default and custom model configurations
- Tool registry setup
- Memory configuration
- Agent configuration
- `TestMainCLI`: Tests the `main()` CLI entry point
- One-shot message execution
- Multi-word prompt handling
- Provider and model flag parsing
- REPL mode functionality
- EOF handling
**Key Coverage:**
- ✅ All three provider types (echo, openai, ollama)
- ✅ Default and custom model names
- ✅ Tool registration verification
- ✅ Memory and configuration setup
- ✅ Command-line argument parsing
- ✅ REPL mode interactions
**Total Tests:** 13
---
### 2. `tests/unit/test_ollama_model.py`
**Purpose:** Tests for the new `agent/models/ollama.py` model provider.
**Test Classes:**
- `TestOllamaModelInitialization`: Tests model initialization
- Default model ("llama3.1")
- Custom model names
- Base URL configuration (default, custom, from environment)
- Environment variable override behavior
- `TestOllamaModelComplete`: Tests the `complete()` method
- Simple message completion
- HTTP request structure and parameters
- Message formatting (system, user, assistant, tool roles)
- Role conversion (tool/unknown → user)
- Error handling (missing requests library)
- Empty response handling
- HTTP error propagation
**Key Coverage:**
- ✅ Initialization with various configurations
- ✅ HTTP POST request to Ollama API
- ✅ Message role handling and conversion
- ✅ Timeout configuration
- ✅ Response parsing
- ✅ Error conditions
- ✅ Tool parameter handling (ignored as expected)
**Total Tests:** 12
---
### 3. `tests/unit/test_builtin_tools_new.py`
**Purpose:** Tests for new tools added to `agent/tools/builtin.py`.
**Test Classes:**
- `TestMathCalcTool`: Tests the `math.calc` tool
- Basic arithmetic operations (+, -, *, /, //, %, **)
- Expression evaluation with parentheses
- Operator precedence
- Error handling (empty expression, invalid syntax, division by zero)
- Security (no variables, functions, or non-numeric operations)
- `TestWebGetTool`: Tests the `web.get` tool
- Simple GET requests
- URL validation (missing, empty, None)
- Mocked HTTP interactions
- `TestWebSearchTool`: Tests the `web.search` tool
- Query handling
- Result count configuration
- Boundary conditions (min 1, max 10 results)
- Result structure validation
**Key Coverage:**
- ✅ Math calculator: 10 test cases covering operations and errors
- ✅ Web GET: 3 test cases for requests and validation
- ✅ Web search: 4 test cases for queries and result limits
- ✅ All tools registered properly
**Total Tests:** 17
---
### 4. `tests/unit/test_agent_core.py`
**Purpose:** Tests for `agent/core/agent.py` including Agent and AgentConfig.
**Test Classes:**
- `TestAgentConfig`: Tests the `AgentConfig` dataclass
- Default values
- Custom values
- System prompt configuration
- `TestAgentInitialization`: Tests Agent class initialization
- Full parameter initialization
- Minimal parameter initialization with defaults
- `TestAgentAsk`: Tests the `Agent.ask()` method
- Simple message handling
- System prompt injection (once only)
- System prompt omission when None
- Memory updates
- `TestAgentToolCalling`: Tests tool calling behavior
- Tool invocation with dict arguments
- None argument handling
- Max steps enforcement
**Key Coverage:**
- ✅ AgentConfig defaults and customization
- ✅ Agent initialization patterns
- ✅ System prompt management (new feature)
- ✅ Message memory handling
- ✅ Tool calling with various argument types
- ✅ Tool argument normalization (new feature)
- ✅ Max steps limit enforcement
**Total Tests:** 12
---
## Overall Test Statistics
| File | Test Classes | Test Methods | Lines of Code |
|------|--------------|--------------|---------------|
| test_agent_cli.py | 2 | 13 | ~150 |
| test_ollama_model.py | 2 | 12 | ~200 |
| test_builtin_tools_new.py | 3 | 17 | ~180 |
| test_agent_core.py | 4 | 12 | ~250 |
| **TOTAL** | **11** | **54** | **~780** |
## Coverage Areas
### New Features Tested
1. **Ollama Model Provider** (Complete)
- Initialization with environment variables
- HTTP communication with Ollama API
- Message formatting and role conversion
2. **System Prompt Support** (Complete)
- One-time injection at conversation start
- Optional system prompt (None handling)
- Default helpful assistant prompt
3. **Tool Argument Normalization** (Complete)
- JSON string parsing
- None handling → empty dict
- Invalid JSON → {"input": raw_string}
- Non-dict types → {"input": value}
4. **Math Calculator Tool** (Complete)
- Safe arithmetic expression evaluation
- Comprehensive operator support
- Security restrictions
5. **Web Tools** (Complete)
- web.get: HTTP GET wrapper
- web.search: Stub search implementation
### Modified Functionality Tested
1. **CLI Provider Selection**
- New "ollama" option
- Model name passing
2. **Agent Tool Calling**
- Enhanced argument normalization
- Tool name preservation in messages
- ModelMessage name attribute usage
## Test Execution
To run these tests:
```bash
# Run all agent tests
python -m pytest tests/unit/test_agent_*.py tests/unit/test_ollama_*.py tests/unit/test_builtin_tools_new.py -v
# Run specific test file
python -m pytest tests/unit/test_agent_cli.py -v
# Run specific test class
python -m pytest tests/unit/test_agent_cli.py::TestBuildAgent -v
# Run specific test method
python -m pytest tests/unit/test_agent_cli.py::TestBuildAgent::test_build_agent_ollama_default_model -v
# Run with coverage
python -m pytest tests/unit/test_agent_*.py --cov=agent --cov-report=html
```
Or using unittest:
```bash
# Run all tests
python -m unittest discover tests/unit -p "test_agent*.py" -p "test_ollama*.py" -p "test_builtin*.py"
# Run specific file
python -m unittest tests/unit/test_agent_cli.py
# Run specific test
python -m unittest tests.unit.test_agent_cli.TestBuildAgent.test_build_agent_ollama_default_model
```
## Test Quality Attributes
### Comprehensive Coverage
- ✅ Happy paths (expected behavior)
- ✅ Edge cases (empty inputs, boundary conditions)
- ✅ Error conditions (invalid inputs, missing dependencies)
- ✅ Integration points (mocking external dependencies)
### Best Practices
- ✅ Descriptive test names
- ✅ Clear docstrings
- ✅ setUp/tearDown where appropriate
- ✅ Proper mocking of external dependencies
- ✅ Assertion messages for clarity
- ✅ Test isolation (no shared state between tests)
### Maintainability
- ✅ Organized by functionality
- ✅ Reusable mock classes (MockModel)
- ✅ Consistent patterns across test files
- ✅ Comments explaining complex scenarios
## Files Changed vs. Tests Created
| Changed File | Test File | Status |
|--------------|-----------|--------|
| agent/cli.py | tests/unit/test_agent_cli.py | ✅ Complete |
| agent/core/agent.py | tests/unit/test_agent_core.py | ✅ Complete |
| agent/models/ollama.py | tests/unit/test_ollama_model.py | ✅ Complete |
| agent/tools/builtin.py | tests/unit/test_builtin_tools_new.py | ✅ Complete |
| `agent/models/__init__.py` | (No test needed - simple import) | N/A |
| pyproject.toml | (Configuration file) | N/A |
| requirements.txt | (Dependency file) | N/A |
## Notes
1. **Mock Usage**: Tests use mocking extensively to avoid external dependencies (HTTP requests, Ollama server, OpenAI API).
2. **Isolation**: Each test is independent and doesn't rely on side effects from other tests.
3. **Real Dependencies**: Tests import real agent modules but mock external I/O operations.
4. **Extensibility**: Test structure allows easy addition of new test cases as functionality evolves.
5. **CI/CD Ready**: Tests are designed to run in automated environments without external service dependencies.
## Future Enhancements
Consider adding:
- Integration tests with real Ollama server (if available in CI)
- Performance/benchmark tests for math.calc with complex expressions
- More edge cases for tool argument normalization
- Tests for concurrent tool calls (when allow_parallel_tools is enabled)
- End-to-end tests combining CLI, agent, and tools