An array of values.
The valid value.
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 an array is not contain the value, will throw an UnitTestException with the value and array values.
// Will throw an exception like "UnitTestException@example.d(6): <[Peter, Anatoliy]> is not contain <Andrew>." ["Peter", "Anatoly"].shouldBeContain("Andrew");
Used to assert that array is contain of specified value.