# testing

Testing utilities and assertions for Lux.

## Installation

```bash
lux pkg add testing 0.1.0
```

## Usage

```lux
import testing

fn testMyFunction(): Unit with {Console, Test} = {
    testing.describe("MyFunction", fn() => {
        testing.it("should return correct value", fn() => {
            let result = myFunction(5)
            testing.assertEqual(result, 10, "5 * 2 should be 10")
        })

        testing.it("should handle edge cases", fn() => {
            let result = myFunction(0)
            testing.assertEqual(result, 0, "0 * 2 should be 0")
        })
    })
}
```

## Assertions

| Function | Description |
|----------|-------------|
| `assert(cond, msg)` | Assert condition is true |
| `assertEqual(a, b, msg)` | Assert two values are equal |
| `assertSome(opt, msg)` | Assert Option is Some |
| `assertNone(opt, msg)` | Assert Option is None |
| `assertOk(result, msg)` | Assert Result is Ok |
| `assertErr(result, msg)` | Assert Result is Err |
| `assertEmpty(list, msg)` | Assert list is empty |
| `assertLength(list, n, msg)` | Assert list has length n |
| `assertContains(s, sub, msg)` | Assert string contains substring |
| `assertStartsWith(s, pre, msg)` | Assert string starts with prefix |
| `assertEndsWith(s, suf, msg)` | Assert string ends with suffix |

## Test Structure

| Function | Description |
|----------|-------------|
| `describe(name, tests)` | Group related tests |
| `it(desc, test)` | Define individual test |

## License

MIT