PHP Unit, Testing laravel log messages with unit testing

Question

I'm using PHPUnit to create a Unit test for a store function that stores data in a database.

Currently, i have a test verifies that it has stored data.

However, I also want to create a test that proves that a laravel log message has been produced if the model save function fails.

The code below shows the store function. The "log::info" is the line I want to test.

Thanks.

public function store(Venue $venue){ 
    $saved =  $venue->save();
    if($saved == false){
        Log::info('Failed to Save Venue'. $venue);
    }
 }

This what I have so far, i pass an empty model that will cause the save to fail due to database constraints

public function test_venue_store_failed(){
   $venue = new Venue();
   $venueRepo = new VenueRepository();
   $this->withExceptionHandling();
   $venueRepo->store($venue);
}

Answer 1

You can mock the Log facade in your unit test as follows, as per the docs:

public function test_venue_store_failed(){
    $venue = new Venue();

    Log::shouldReceive('info')
        ->with('Failed to Save Venue'. $venue);

    $venueRepo = new VenueRepository();
    $this->withExceptionHandling();
    $venueRepo->store($venue);
}