[9.x] Adds expectsOutputToContain to the PendingCommand.

[xiCO2k]

Hey guys,

This PR adds a method to the PendingCommand to be used for testing.

The main reason is to test if the output contains a text, I found this really helpful, to use for the CLI output, its like the assertSee method from the Http response.

Example

$this->artisan('Hello World')
      ->expectsOutputToContain('Hello');

Hope that helps,

Thanks,
Francisco.

[driesvints]

Hi, I've fixed the tests on 9.x so please rebase your PR and mark your PR as ready when tests pass. Thanks

[xiCO2k]

sure thing! Thanks @driesvints

[stancl]

@xiCO2k I noticed that the behavior is a bit different than expectsOutput() which may be confusing to the user. It seems that with expectsOutputToContain(), you need to actually trigger the command with something else, such as assertExitCode(0) in the test you PR'd here.

But if you simply swap expectsOutput() to expectsOutputToContain(), the test will make no assertions.