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Esp32Dimmer/test_app/README.md
2026-01-24 22:18:52 +00:00

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# ESP32 Dimmer Driver Unit Tests
This directory contains unit tests for the ESP32 Dimmer Driver library.
## Test Structure
The tests are organized using the ESP-IDF Unity testing framework and cover the following functionality:
### Test Categories
1. **Dimmer Creation Tests**
- `test_createDimmer_returns_valid_pointer`: Verifies that createDimmer returns a valid pointer
- `test_createDimmer_with_different_pins`: Tests creating multiple dimmers with different GPIO pins
2. **Power Control Tests**
- `test_setPower_getPower_normal_values`: Tests setting and getting power with normal values (0, 50, 99)
- `test_setPower_boundary_values`: Tests boundary conditions (values above 99 are clamped)
- `test_getPower_when_dimmer_off`: Verifies getPower returns 0 when dimmer is OFF
3. **State Management Tests**
- `test_setState_getState`: Tests setting and getting the dimmer state (ON/OFF)
- `test_changeState_toggles_state`: Verifies changeState toggles between ON and OFF
- `test_state_affects_getPower`: Tests that state changes affect getPower behavior
4. **Mode Management Tests**
- `test_setMode_getMode`: Tests setting and getting dimmer modes (NORMAL/TOGGLE)
- `test_toggleSettings_with_valid_values`: Tests toggle settings with valid range
- `test_toggleSettings_boundary_values`: Tests toggle settings with boundary values
5. **Initialization Tests**
- `test_begin_with_normal_mode`: Tests initialization with NORMAL_MODE
- `test_begin_with_toggle_mode`: Tests initialization with TOGGLE_MODE
6. **Multiple Dimmer Tests**
- `test_multiple_dimmers_independent`: Verifies multiple dimmers operate independently
## Running the Tests
### Prerequisites
- ESP-IDF v5.0 or higher installed
- ESP32 development board (tests can run without actual hardware connected)
### Validate Your Setup
Before running tests, you can validate your environment:
```bash
./validate_setup.sh
```
This will check:
- Python and ESP-IDF installation
- Required files and directories
- Serial port availability
- CMake installation
### Build and Flash
1. Navigate to the test_app directory:
```bash
cd test_app
```
2. Set the target (if not already set):
```bash
idf.py set-target esp32
```
3. Build the test application:
```bash
idf.py build
```
4. Flash to your ESP32 board:
```bash
idf.py -p /dev/ttyUSB0 flash monitor
```
Replace `/dev/ttyUSB0` with your serial port.
### Expected Output
When the tests run successfully, you should see output similar to:
```
========================================
ESP32 Dimmer Driver Unit Tests
========================================
Running test_createDimmer_returns_valid_pointer...
PASS
Running test_createDimmer_with_different_pins...
PASS
...
========================================
All tests completed!
========================================
16 Tests 0 Failures 0 Ignored
OK
```
## Test Coverage
The unit tests cover:
- ✅ Dimmer object creation
- ✅ Power setting and retrieval with boundary conditions
- ✅ State management (ON/OFF)
- ✅ Mode management (NORMAL/TOGGLE)
- ✅ Toggle settings configuration
- ✅ Multiple independent dimmers
- ✅ State-dependent behavior
## Notes for Future Refactoring
These unit tests are designed to:
1. **Enable safe refactoring**: The tests verify the API contract, allowing you to refactor internal implementation while ensuring the public API behavior remains consistent.
2. **Document expected behavior**: Each test serves as executable documentation of how the library should behave.
3. **Catch regressions**: Running these tests after changes helps catch any unintended behavior changes.
4. **Hardware independence**: These tests focus on the software logic and can run without actual dimmer hardware connected. They test the API layer and state management.
## Limitations
- These tests do not verify actual hardware functionality (zero-crossing detection, TRIAC firing)
- ISR behavior is not directly tested (requires hardware/simulation)
- Timing-critical code paths are not fully tested without hardware
For hardware integration testing, additional tests would be needed with actual hardware or simulation.
## Adding New Tests
To add new tests:
1. Add new test functions to `main/test_main.c`
2. Use the Unity assertion macros (TEST_ASSERT_*, etc.)
3. Register the test with `RUN_TEST()` in the `app_main()` function
4. Follow the naming convention: `test_<functionality>_<scenario>`
Example:
```c
void test_new_feature_basic_functionality(void)
{
dimmertyp *dimmer = createDimmer(TEST_TRIAC_GPIO, TEST_ZC_GPIO);
TEST_ASSERT_NOT_NULL(dimmer);
// Your test code here
}
```
Then add to `app_main()`:
```c
RUN_TEST(test_new_feature_basic_functionality);
```