Used to assert that one value is equal to true.
The value that should equal true.
The exception message.
The file name that the assert failed in. Should be left as default.
The file line that the assert failed in. Should be left as default.
If values are not true, will throw an UnitTestException with expected and actual values.
// Will throw an exception like "checkit.exception.UnitTestException@example.d(6): Expected <true>, got <false>" false.shouldBeTrue();