/** @test */
public function andReturnUsing_shouldReturnACallbacksValue()
{
$spy = new Spy();
$spy->andReturnUsing(function ($arg) {
return strtoupper($arg);
});
$this->assertEquals('FOO', $spy('foo'));
}
public static function returnsUsing(callable $cb)
{
$spy = new Spy();
$spy->andReturnUsing($cb);
return $spy;
}
