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Funkin/tests/unit/README.md

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Flixel Unit Tests
-----------------
This is a unit test project using [munit](https://github.com/massiveinteractive/MassiveUnit). It's good practice to add tests for fixed bugs or new features.
TODO Make sure the unit tests are automatically run on GitHub Actions.
There's a 1:1 mapping between `.hx` files in `source/` and the unit test project - tests for `funkin.Conductor` go into `funkin.ConductorTest` etc.
### Building
Run one of the `test-*.hxml` files in this directory to run the tests on that specific target, e.g. `haxe test-cpp.hxml`. Currently supported are:
- `web` (HTML5)
- `cpp` (Native)
Alternatively, this can be done from within Visual Studio Code - (`F1` -> `Tasks: Run Task` -> Choose the target to test).
#### Adding Tests
- Run `haxelib run munit create com.FooBarTest -for com.Foo`
- Use `@:allow(full.package.name.ClassName)` to allow a test class to call private functions.
- Use `mockatoo.Mockatoo.mock(ClassName)` to mock a class. See [Mockatoo docs](https://github.com/misprintt/mockatoo).
#### Functions
- `@Before` functions are named `before()`
- Each `@Test` function starts with `test` and describes what exactly it tests. This can lead to long function names like `FlxEmitter#testStartShouldNotReviveMembers()` and serves as self-documentation.
- Another thing that helps with self-documentation is adding a comment for tests that are related an issue on GitHub.
```haxe
@Test // #1203
function testColorWithAlphaComparison()
```
### `FunkinTest` base class
Test classes extend `FunkinTest`, which is a base class with some utility functions for testing.
### `step()`
`step()` advances the `FlxGame` exactly one step. This is useful for tests that depend on game time advancing / `FlxGame#step()` being executed, such as physics of `add()`ed objects, state switches, or just time passing for tweens or timers.
There are two parameters:
- `steps` - specifies the amount of steps to advance (defaults to 1)
- `callback` - an optional callback function that is executed after each step
### `testDestroy()`
`testDestroy()` tests whether an `IFlxDestroyable` can safely be `destroy()`ed more than once (null reference errors are fairly common here). For this, `destroyable` has to be set during `before()` of the test class.
Unit Tests: Coverage Reporting and Github Actions Integration (#131) * Initial test suite * Fix some build warnings * Implemented working unit tests with coverage * Reduced some warnings * Fix a mac-specific issue * Add 2 additional unit test classes. * Multiple new unit tests * Some fixins * Remove auto-generated file * WIP on hiding ignored tests * Added list of debug hotkeys * Remove old website * Remove empty file * Add more unit tests * Fix bug where arrows would nudge BF * Fix bug where ctrl/alt would flash capsules * Fixed bug where bf-old easter egg broke * Remove duplicate lines * More test-related stuff * Some code cleanup * Add mocking and a test assets folder * More TESTS! * Update Hmm... * Update artist on Monster * More minor fixes to individual functions * 1.38% unit test coverage! * Even more tests? :O * More unit test work * Rework migration for BaseRegistry * gameover fix * Fix an issue with Lime * Fix issues with version parsing on data files * 100 total unit tests! * Added even MORE unit tests! * Additional test tweaks :3 * Fixed tests on windows by updating libraries. * A bunch of smaller syntax tweaks. * New crash handler catches and logs critical errors! * Chart editor now has null safety enabled. * Null safety on all tests * New Level data test * Generate proper code coverage reports! * Disable null safety on ChartEditorState for unit testing * Update openfl to use latest fixes for crash reporting * Added unit test to Github Workflow * Updated unit tests to compile with null safety enabled by inlining assertions. * Added coverage gutters as a recommended extension * Impreovements to tests involving exceptions * Disable a few incomplete tests. * Add scripts for building unit coverage reports on linux --------- Co-authored-by: Cameron Taylor <cameron.taylor.ninja@gmail.com>
2023-08-30 22:31:59 +00:00
### Null Safety
Append each test class with `@:nullSafety` to prevent crash bugs while developing.
Note that `Assert.isNotNull(target)` is considered a vlid