React\Promise\FunctionRaceTest::shouldResolveSparseArrayInput PHP Method

    public function shouldResolveSparseArrayInput()
    {
        $mock = $this->createCallableMock();
        $mock->expects($this->once())->method('__invoke')->with($this->identicalTo(null));
        race([null, 1, null, 2, 3])->then($mock);
    }