PHP Mockery simple example TestCase.

TemperatureTest.php

<?php

namespace Tests\Feature;

use App\Temperature;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithFaker;
use Mockery;
use Tests\TestCase;

class TemperatureTest extends \Mockery\Adapter\Phpunit\MockeryTestCase
{
    public function mockeryTestSetUp()
    {
        parent::mockeryTestSetUp();
    }

    public function mockeryTestTearDown()
    {
        parent::mockeryTestTearDown();
        Mockery::close();
    }

    public function testGetsAverageTemperatureFromThreeServiceReadings()
    {
        $service = Mockery::mock('service');

        $count = 4;

        $service->shouldReceive([
            'count' => $count
            ]);

        $service->shouldReceive('readTemp')
            ->times($count)
            ->andReturn(14, 10, 9, 15);

        $temperature = new Temperature($service);

        $this->assertEquals(12, $temperature->average());
    }
}

see Temperature.php