SampleTraitTest.php

SampleTraitTest.php

<?php

use Mockery as m;
use PHPUnit\Framework\TestCase;

class SampleTest extends TestCase
{
    protected function setUp()
    {
        parent::setUp();
    }

    protected function tearDown()
    {
        m::close();
    }

    /**
     * @test
     */
    public function testTrait()
    {
        /** @var SampleTraitDemo|m\Mock $target */
        $target = m::mock(SampleTraitDemo::class)
                     ->makePartial()
                     ->shouldAllowMockingProtectedMethods();
        $target->shouldReceive('thisIsATrait')
               ->andReturn('i am mock');

        $expected = 'use Trait - i am mock';

        $actual = $target->useTrait();

        $this->assertSame($expected, $actual);

        /** Assert */

    }
}

trait ATrait
{
    protected function thisIsATrait()
    {
        return 'a real trait';
    }
}

class SampleTraitDemo
{
    use ATrait;

    public function useTrait()
    {
        return ('use Trait - ' . $this->thisIsATrait());
    }
}