public function testCalledChangesState()
{
$callback = new Callback(function () {
// empty
});
$this->assertFalse($callback->wasCalled());
$this->assertEquals(0, $callback->getCalled());
$callback->call();
$this->assertTrue($callback->wasCalled());
$this->assertEquals(1, $callback->getCalled());
$callback->call();
$this->assertEquals(2, $callback->getCalled());
}
