Details about the method assertInvalidCredentials in Laravel 11
The method assertInvalidCredentials() in Laravel 11 is used for testing the authentication functionalities during the unit tests designed to ensure that when writing tests for authentication flows, this method helps you to verify that when a user enters invalid credentials while logging into the system, the system can correctly recognize it.
This method is quite handy as it allows programmers to test different scenarios of logging into the system and ensures that the system behaves correctly. For example, you can test if an appropriate error message is shown when a user enters an incorrect username or password.
The usage of this method is very simple, and you just need to include the invalid credentials in the test method. You can then expect that a login failure should occur, indicating that the system has recognized the invalid inputs and displayed an appropriate error message.
To become more familiar with this method, let’s examine a practical example of how to use it. This way, you will not only be familiar with the usage pattern of this method but also be able to write stronger tests for authentication in Laravel 11.
public function test_user_cannot_login_with_invalid_credentials()
{
$this->post('/login', [
'email' => '[email protected]',
'password' => 'incorrectpassword'
])->assertInvalidCredentials();
}Code explanations
Here’s a method that specifies that a user cannot log in with invalid information.
Error 1:
public function test_user_cannot_login_with_invalid_credentials() This line indicates that we have defined a test called
test_user_cannot_login_with_invalid_credentials.Error 2:
$this->post('/login', [...]) Using the method
post, we send a request to the address /login.Error 3:
'email' => '[email protected]' We send an invalid email to the system for login.
Error 4:
'password' => 'incorrectpassword' Similarly, we send an incorrect password as well.
Error 5:
->assertInvalidCredentials(); This line indicates that the user’s login attempt is based on the invalid information provided, and the system should report an appropriate error.