assertGreaterThan method
Asserts that this number is greater than value.
Throws a test failure if this number is not greater than value.
value: The value to compare against.message: Optional custom message for the failure reason.
Implementation
void assertGreaterThan(num value, {String? message}) {
expect(this > value, isTrue,
reason: message ?? 'Expected $this to be greater than $value');
}