Kraken\_Unit\Promise\_Partial\ApiCancelPartial::testApiCancel_CallsCancellerOnce_IfCalledMultipleTimes PHP Method

    public function testApiCancel_CallsCancellerOnce_IfCalledMultipleTimes()
    {
        $deferred = $this->createDeferred();
        $test = $this->getTest();
        $mock = $test->createCallableMock();
        $mock->expects($test->once())->method('__invoke')->with($test->identicalTo(null));
        $deferred->getPromise()->then($test->expectCallableNever(), $test->expectCallableNever(), $mock);
        $deferred->cancel();
        $deferred->cancel();
    }