React\Promise\FunctionReduceTest::shouldCancelInputArrayPromises PHP Method

    public function shouldCancelInputArrayPromises()
    {
        $mock1 = $this->getMockBuilder('React\\Promise\\CancellablePromiseInterface')->getMock();
        $mock1->expects($this->once())->method('cancel');
        $mock2 = $this->getMockBuilder('React\\Promise\\CancellablePromiseInterface')->getMock();
        $mock2->expects($this->once())->method('cancel');
        reduce([$mock1, $mock2], $this->plus(), 1)->cancel();
    }