public function testConcatenationMaintainsLength()
{
$this->forAll(Generator\vector(10, Generator\nat(1000)), Generator\vector(10, Generator\nat(1000)))->then(function ($first, $second) {
$concatenated = array_merge($first, $second);
$this->assertEquals(count($concatenated), count($first) + count($second), var_export($first, true) . " and " . var_export($second, true) . " do not maintain their length when concatenated.");
});
}
public function testAlwaysFails()
{
$this->forAll([Generator\frequency([[8, Generator\nat(1, 100)], [4, Generator\nat(100, 200)], [4, Generator\nat(200, 300)]])])->then(function ($element) {
// Expected to shrunk always to 1
$this->assertEquals(0, $element);
});
}
public function testShrinkingMappedValuesInsideOtherGenerators()
{
$this->forAll(Generator\vector(3, Generator\map(function ($n) {
return $n * 2;
}, Generator\nat())))->then(function ($tripleOfEvenNumbers) {
$this->assertLessThanOrEqual(100, array_sum($tripleOfEvenNumbers), "The triple sum " . var_export($tripleOfEvenNumbers, true) . " is not less than 100");
});
}
public function testGeneratedDataCollectionWithCustomMapper()
{
$this->forAll(Generator\seq(Generator\nat()))->withMaxSize(10)->hook(Listener\collectFrequencies(function ($array) {
return count($array);
}))->then(function ($array) {
$this->assertEquals(count($array), count(array_reverse($array)));
});
}
/**
* Shrinking may be avoided when then() is slow or non-deterministic.
*/
public function testThenIsNotCalledMultipleTime()
{
$this->calls = 0;
$this->forAll(Generator\nat())->disableShrinking()->then(function ($number) {
$this->calls++;
$this->assertTrue(false, "Total calls: {$this->calls}");
});
}
public function testSetsOfAnotherGeneratorsDomain()
{
$this->forAll(Generator\set(Generator\nat()))->then(function ($set) {
$this->assertInternalType('array', $set);
foreach ($set as $element) {
$this->assertGreaterThanOrEqual(0, $element);
}
});
}
public function testArraySorting()
{
$this->forAll(Generator\seq(Generator\nat()))->then(function ($array) {
sort($array);
for ($i = 0; $i < count($array) - 1; $i++) {
$this->assertTrue($array[$i] <= $array[$i + 1], "Array is not sorted: " . var_export($array, true));
}
});
}
public function testArraySortingIsIdempotent()
{
$this->forAll(Generator\seq(Generator\nat()))->then(function ($array) {
sort($array);
$expected = $array;
sort($array);
$this->assertEquals($expected, $array);
});
}
public function testCreatingABrandNewGeneratorFromAGeneratedValue()
{
$this->forAll(Generator\bind(Generator\vector(4, Generator\nat()), function ($vector) {
return Generator\tuple(Generator\elements($vector), Generator\constant($vector));
}))->then(function ($tuple) {
list($element, $vector) = $tuple;
$this->assertContains($element, $vector);
});
}
public function testNotWithstandingCrashesJobsAreEventuallyPerformed()
{
$this->limitTo(100)->forAll(Generator\bind(Generator\choose(1, 4), function ($workers) {
return Generator\tuple(Generator\constant($workers), Generator\seq(Generator\oneOf(Generator\map(function ($durationAndTag) {
list($duration, $tag) = $durationAndTag;
return ['enqueueJob', $duration, $tag];
}, Generator\tuple(Generator\nat(), Generator\elements(['generic', 'fast-lane']))), Generator\map(function ($workerIndex) {
return ['restartWorkerGracefully', $workerIndex];
}, Generator\choose(0, $workers - 1)), Generator\map(function ($workerIndex) {
return ['restartWorkerByKilling', $workerIndex];
}, Generator\choose(0, $workers - 1)), Generator\constant('restartRecruiterGracefully'), Generator\constant('restartRecruiterByKilling'), Generator\map(function ($milliseconds) {
return ['sleep', $milliseconds];
}, Generator\choose(1, 1000)))));
}))->hook(Listener\log('/tmp/recruiter-test-iterations.log'))->hook(Listener\collectFrequencies())->disableShrinking()->then(function ($tuple) {
list($workers, $actions) = $tuple;
$this->clean();
$this->start($workers);
foreach ($actions as $action) {
$this->logAction($action);
if (is_array($action)) {
$arguments = $action;
$method = array_shift($arguments);
call_user_func_array([$this, $method], $arguments);
} else {
$this->{$action}();
}
}
$estimatedTime = max(count($actions) * 4, 60);
Timeout::inSeconds($estimatedTime, function () {
return "all {$this->jobs} jobs to be performed. Now is " . date('c') . " Logs: " . $this->files();
})->until(function () {
return $this->jobRepository->countArchived() === $this->jobs;
});
$at = T\now();
$statistics = $this->recruiter->statistics($tag = null, $at);
$this->assertInvariantsOnStatistics($statistics);
// TODO: remove duplication
$statisticsByTag = [];
$cumulativeThroughput = 0;
foreach (['generic', 'fast-lane'] as $tag) {
$statisticsByTag[$tag] = $this->recruiter->statistics($tag, $at);
$this->assertInvariantsOnStatistics($statisticsByTag[$tag]);
$cumulativeThroughput += $statisticsByTag[$tag]['throughput']['value'];
}
var_dump($statistics, $statisticsByTag);
// TODO: add tolerance
$this->assertEquals($statistics['throughput']['value'], $cumulativeThroughput);
});
}
public function testUseConstantGeneratorImplicitly()
{
$this->forAll(Generator\nat(), 2)->then(function ($number, $alwaysTwo) {
$this->assertTrue($number * $alwaysTwo % 2 === 0);
});
}
public function testNaturalNumbersMagnitude()
{
$this->forAll(Generator\nat(1000))->then(function ($number) {
$this->assertTrue($number < 42, "{$number} is not less than 42 apparently");
});
}
public function testArrayReverse()
{
$this->forAll(Generator\seq(Generator\nat()))->then(function ($array) {
$this->assertEquals($array, array_reverse(array_reverse($array)));
});
}
public function testDiff()
{
$this->iterations = 1000;
$this->forAll(Generator\nat(), Generator\date(new DateTime('1980-01-01'), new DateTime('2020-12-31')))->then(function ($days, $datetime) {
$date = UTCDateTime::box($datetime);
$addDiff = $date->addDays($days)->diff($date)->days;
$subDiff = $date->subtractDays($days)->diff($date)->days;
$this->assertSame($days, $addDiff, "adding and diffing {$days} days(s) from {$date->toIso8601()} returned {$addDiff}");
$this->assertEquals($days, $subDiff, "subtracting and diffing {$days} month(s) from {$date->toIso8601()} returned {$subDiff}");
});
}
public function testSamplingShrinking()
{
$generator = Generator\nat(1000);
var_dump($this->sampleShrink($generator));
}
public function testPropertyNeverSatisfied()
{
$this->forAll(Generator\nat(1000), Generator\nat(1000))->then(function ($first, $second) {
$this->assertEquals(-1, my_sum($first, $second), "Summing {$first} and {$second}");
});
}
