assertEquals($json['error'], 'The username is empty, please, write username!!!'); } public function testValidUserWithMatrixUsername(): void { $matrixUsername = '@test:test.com'; $json = User::validateWithMatrixUsername($matrixUsername); $this->assertEquals($json['ok'], 'A user with the username is valid.'); } public function testNotExistingUserWithMatrixUsername(): void { $matrixUsername = '@kostia:test.com'; $json = User::validateWithMatrixUsername($matrixUsername); $this->assertEquals($json['error'], 'A user with the username does not exist!!!'); } }