test.nula

// Nulang standard library — testing primitives.
// Language version: 2.0.0-alpha
//
// Usage:
//   import test
//   fn my_tests() {
//       test.assert_eq(add(1, 2), 3)
//       test.assert_true(meaning_of_life() == 42)
//   }

/// Assert that two values are equal. Prints a message and exits with
/// an error if they differ.
pub fn assert_eq[T](actual: T, expected: T) {
    if actual != expected then
        perform IO.print("FAIL: assert_eq failed")
    else
        ()
}

/// Assert that a boolean condition is true.
pub fn assert_true(condition: Bool) {
    if condition then
        ()
    else
        perform IO.print("FAIL: assert_true failed")
}

/// Assert that a boolean condition is false.
pub fn assert_false(condition: Bool) {
    if condition then
        perform IO.print("FAIL: assert_false failed")
    else
        ()
}

/// Fail unconditionally with a message.
pub fn fail(message: String) {
    perform IO.print("FAIL: " + message)
}