TestCase.php

<?php

namespace Clue\Tests\React\Zlib;

class TestCase extends \PHPUnit\Framework\TestCase
{
    protected function expectCallableOnce()
    {
        $mock = $this->createCallableMock();

        $mock
            ->expects($this->once())
            ->method('__invoke');

        return $mock;
    }

    protected function expectCallableOnceWith($value)
    {
        $mock = $this->createCallableMock();

        $mock
            ->expects($this->once())
            ->method('__invoke')
            ->with($this->equalTo($value));

        return $mock;
    }

    protected function expectCallableNever()
    {
        $mock = $this->createCallableMock();
        $mock
            ->expects($this->never())
            ->method('__invoke');

        return $mock;
    }

    protected function createCallableMock()
    {
        return $this->getMockBuilder('stdClass')->setMethods(array('__invoke'))->getMock();
    }
}