Strings::startsWith('123', null), TypeError::class, ); Assert::true(Strings::startsWith('123', ''), "startsWith('123', '')"); Assert::true(Strings::startsWith('123', '1'), "startsWith('123', '1')"); Assert::false(Strings::startsWith('123', '2'), "startsWith('123', '2')"); Assert::true(Strings::startsWith('123', '123'), "startsWith('123', '123')"); Assert::false(Strings::startsWith('123', '1234'), "startsWith('123', '1234')");