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Add Emitter and Observer tests
This commit is contained in:
Aaron Piotrowski
parent
1bbcadaedd
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c73ca4e427
135
test/EmitterTest.php
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135
test/EmitterTest.php
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@ -0,0 +1,135 @@
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<?php declare(strict_types = 1);
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namespace Amp\Test;
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use Amp;
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use Amp\{ Deferred, Emitter, Pause };
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class EmitterTest extends \PHPUnit_Framework_TestCase {
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const TIMEOUT = 100;
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/**
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* @expectedException \Error
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* @expectedExceptionMessage The callable did not return a Generator
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*/
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public function testNonGeneratorCallable() {
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$emitter = new Emitter(function () {});
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}
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public function testEmit() {
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$invoked = false;
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Amp\execute(function () use (&$invoked) {
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$value = 1;
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$emitter = new Emitter(function (callable $emit) use ($value) {
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yield $emit($value);
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return $value;
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});
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$invoked = false;
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$callback = function ($emitted) use (&$invoked, $value) {
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$invoked = true;
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$this->assertSame($emitted, $value);
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};
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$emitter->subscribe($callback);
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$emitter->when(function ($exception, $result) use ($value) {
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$this->assertSame($result, $value);
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});
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});
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$this->assertTrue($invoked);
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}
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/**
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* @depends testEmit
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*/
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public function testEmitSuccessfulPromise() {
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$invoked = false;
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Amp\execute(function () use (&$invoked) {
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$deferred = new Deferred();
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$emitter = new Emitter(function (callable $emit) use ($deferred) {
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return yield $emit($deferred->promise());
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});
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$value = 1;
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$invoked = false;
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$callback = function ($emitted) use (&$invoked, $value) {
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$invoked = true;
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$this->assertSame($emitted, $value);
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};
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$emitter->subscribe($callback);
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$deferred->resolve($value);
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});
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$this->assertTrue($invoked);
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}
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/**
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* @depends testEmitSuccessfulPromise
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*/
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public function testEmitFailedPromise() {
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$exception = new \Exception;
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Amp\execute(function () use ($exception) {
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$deferred = new Deferred();
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$emitter = new Emitter(function (callable $emit) use ($deferred) {
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return yield $emit($deferred->promise());
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});
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$deferred->fail($exception);
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$emitter->when(function ($reason) use ($exception) {
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$this->assertSame($reason, $exception);
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});
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});
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}
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/**
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* @depends testEmit
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*/
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public function testEmitBackPressure() {
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$emits = 3;
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Amp\execute(function () use (&$time, $emits) {
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$emitter = new Emitter(function (callable $emit) use (&$time, $emits) {
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$time = microtime(true);
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for ($i = 0; $i < $emits; ++$i) {
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yield $emit($i);
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}
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$time = microtime(true) - $time;
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});
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$emitter->subscribe(function () {
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return new Pause(self::TIMEOUT);
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});
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});
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$this->assertGreaterThan(self::TIMEOUT * $emits, $time * 1000);
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}
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/**
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* @depends testEmit
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*/
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public function testSubscriberThrows() {
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$exception = new \Exception;
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try {
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Amp\execute(function () use ($exception) {
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$emitter = new Emitter(function (callable $emit) {
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yield $emit(1);
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yield $emit(2);
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});
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$emitter->subscribe(function () use ($exception) {
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throw $exception;
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});
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});
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} catch (\Exception $caught) {
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$this->assertSame($exception, $caught);
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}
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}
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}
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182
test/ObserverTest.php
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182
test/ObserverTest.php
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<?php declare(strict_types = 1);
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namespace Amp\Test;
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use Amp;
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use Amp\{ Emitter, Observer, Pause, Postponed };
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class ObserverTest extends \PHPUnit_Framework_TestCase {
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const TIMEOUT = 10;
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public function testSingleEmittingObservable() {
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Amp\execute(function () {
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$value = 1;
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$observable = new Emitter(function (callable $emit) use ($value) {
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yield $emit($value);
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return $value;
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});
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$observer = new Observer($observable);
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while (yield $observer->advance()) {
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$this->assertSame($observer->getCurrent(), $value);
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}
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$this->assertSame($observer->getResult(), $value);
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});
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}
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/**
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* @depends testSingleEmittingObservable
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*/
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public function testFastEmittingObservable() {
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Amp\execute(function () {
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$count = 10;
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$postponed = new Postponed;
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$observer = new Observer($postponed->observe());
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for ($i = 0; $i < $count; ++$i) {
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$promises[] = $postponed->emit($i);
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}
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$postponed->resolve($i);
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for ($i = 0; yield $observer->advance(); ++$i) {
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$this->assertSame($observer->getCurrent(), $i);
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}
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$this->assertSame($count, $i);
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$this->assertSame($observer->getResult(), $i);
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});
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}
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/**
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* @depends testSingleEmittingObservable
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*/
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public function testSlowEmittingObservable() {
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Amp\execute(function () {
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$count = 10;
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$observable = new Emitter(function (callable $emit) use ($count) {
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for ($i = 0; $i < $count; ++$i) {
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yield new Pause(self::TIMEOUT);
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yield $emit($i);
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}
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return $i;
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});
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$observer = new Observer($observable);
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for ($i = 0; yield $observer->advance(); ++$i) {
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$this->assertSame($observer->getCurrent(), $i);
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}
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$this->assertSame($count, $i);
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$this->assertSame($observer->getResult(), $i);
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});
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}
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/**
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* @depends testFastEmittingObservable
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*/
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public function testDrain() {
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Amp\execute(function () {
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$count = 10;
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$postponed = new Postponed;
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$observer = new Observer($postponed->observe());
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for ($i = 0; $i < $count; ++$i) {
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$promises[] = $postponed->emit($i);
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}
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$postponed->resolve($i);
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$values = $observer->drain();
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$this->assertSame(\range(0, $count - 1), $values);
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});
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}
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/**
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* @expectedException \Error
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* @expectedExceptionMessage The observable has not resolved
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*/
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public function testDrainBeforeResolution() {
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$postponed = new Postponed;
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$observer = new Observer($postponed->observe());
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$observer->drain();
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}
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public function testFailingObservable() {
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Amp\execute(function () {
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$exception = new \Exception;
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$postponed = new Postponed;
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$observer = new Observer($postponed->observe());
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$postponed->fail($exception);
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try {
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while (yield $observer->advance());
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$this->fail("Observer::advance() should throw observable failure reason");
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} catch (\Exception $reason) {
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$this->assertSame($exception, $reason);
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}
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try {
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$result = $observer->getResult();
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$this->fail("Observer::getResult() should throw observable failure reason");
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} catch (\Exception $reason) {
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$this->assertSame($exception, $reason);
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}
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});
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}
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/**
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* @expectedException \Error
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* @expectedExceptionMessage Promise returned from advance() must resolve before calling this method
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*/
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public function testGetCurrentBeforeAdvanceResolves() {
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$postponed = new Postponed;
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$observer = new Observer($postponed->observe());
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$promise = $observer->advance();
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$observer->getCurrent();
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}
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/**
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* @expectedException \Error
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* @expectedExceptionMessage The observable has resolved
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*/
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public function testGetCurrentAfterResolution() {
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$postponed = new Postponed;
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$observer = new Observer($postponed->observe());
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$postponed->resolve();
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$observer->getCurrent();
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}
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/**
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* @expectedException \Error
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* @expectedExceptionMessage The observable has not resolved
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*/
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public function testGetResultBeforeResolution() {
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Amp\execute(function () {
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$postponed = new Postponed;
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$observer = new Observer($postponed->observe());
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$observer->getResult();
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});
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}
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}
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