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amp/test/PromiseTest.php
Niklas Keller c12828081f Fix exceptions bubbling from Coroutine::__destruct
This has been an edge case potentially hiding some exceptions. The tests have been refactored to error if the loop has watchers leaking from one test to another test.
2019-05-31 11:38:02 -05:00

462 lines
13 KiB
PHP

<?php
namespace Amp\Test;
use Amp\Loop;
use React\Promise\RejectedPromise as RejectedReactPromise;
class Promise implements \Amp\Promise
{
use \Amp\Internal\Placeholder {
resolve as public;
fail as public;
}
}
class PromiseTest extends BaseTest
{
private $originalErrorHandler;
/**
* A Promise to use for a test with resolution methods.
* Note that the callables shall take care of the Promise being resolved in any case. Example: The actual
* implementation delays resolution to the next loop tick. The callables then must run one tick of the loop in
* order to ensure resolution.
*
* @return array(Promise, callable, callable) where the last two callables are resolving the Promise with a result
* or a Throwable/Exception respectively
*/
public function promise()
{
$promise = new Promise;
return [
$promise,
[$promise, 'resolve'],
[$promise, 'fail'],
];
}
public function provideSuccessValues()
{
return [
["string"],
[0],
[~PHP_INT_MAX],
[-1.0],
[true],
[false],
[[]],
[null],
[new \StdClass],
[new \Exception],
];
}
public function testPromiseImplementsPromise()
{
list($promise) = $this->promise();
$this->assertInstanceOf(Promise::class, $promise);
}
/** @dataProvider provideSuccessValues */
public function testPromiseSucceed($value)
{
list($promise, $succeeder) = $this->promise();
$promise->onResolve(function ($e, $v) use (&$invoked, $value) {
$this->assertNull($e);
$this->assertSame($value, $v);
$invoked = true;
});
$succeeder($value);
$this->assertTrue($invoked);
}
/** @dataProvider provideSuccessValues */
public function testOnResolveOnSucceededPromise($value)
{
list($promise, $succeeder) = $this->promise();
$succeeder($value);
$promise->onResolve(function ($e, $v) use (&$invoked, $value) {
$this->assertNull($e);
$this->assertSame($value, $v);
$invoked = true;
});
$this->assertTrue($invoked);
}
public function testSuccessAllOnResolvesExecuted()
{
list($promise, $succeeder) = $this->promise();
$invoked = 0;
$promise->onResolve(function ($e, $v) use (&$invoked) {
$this->assertNull($e);
$this->assertTrue($v);
$invoked++;
});
$promise->onResolve(function ($e, $v) use (&$invoked) {
$this->assertNull($e);
$this->assertTrue($v);
$invoked++;
});
$succeeder(true);
$promise->onResolve(function ($e, $v) use (&$invoked) {
$this->assertNull($e);
$this->assertTrue($v);
$invoked++;
});
$promise->onResolve(function ($e, $v) use (&$invoked) {
$this->assertNull($e);
$this->assertTrue($v);
$invoked++;
});
$this->assertSame(4, $invoked);
}
public function testPromiseExceptionFailure()
{
list($promise, , $failer) = $this->promise();
$promise->onResolve(function ($e) use (&$invoked) {
$this->assertSame(\get_class($e), "RuntimeException");
$invoked = true;
});
$failer(new \RuntimeException);
$this->assertTrue($invoked);
}
public function testOnResolveOnExceptionFailedPromise()
{
list($promise, , $failer) = $this->promise();
$failer(new \RuntimeException);
$promise->onResolve(function ($e) use (&$invoked) {
$this->assertSame(\get_class($e), "RuntimeException");
$invoked = true;
});
$this->assertTrue($invoked);
}
public function testFailureAllOnResolvesExecuted()
{
list($promise, , $failer) = $this->promise();
$invoked = 0;
$promise->onResolve(function ($e) use (&$invoked) {
$this->assertSame(\get_class($e), "RuntimeException");
$invoked++;
});
$promise->onResolve(function ($e) use (&$invoked) {
$this->assertSame(\get_class($e), "RuntimeException");
$invoked++;
});
$failer(new \RuntimeException);
$promise->onResolve(function ($e) use (&$invoked) {
$this->assertSame(\get_class($e), "RuntimeException");
$invoked++;
});
$promise->onResolve(function ($e) use (&$invoked) {
$this->assertSame(\get_class($e), "RuntimeException");
$invoked++;
});
$this->assertSame(4, $invoked);
}
public function testPromiseErrorFailure()
{
if (PHP_VERSION_ID < 70000) {
$this->markTestSkipped("Error only exists on PHP 7+");
}
list($promise, , $failer) = $this->promise();
$promise->onResolve(function ($e) use (&$invoked) {
$this->assertSame(\get_class($e), "Error");
$invoked = true;
});
$failer(new \Error);
$this->assertTrue($invoked);
}
public function testOnResolveOnErrorFailedPromise()
{
if (PHP_VERSION_ID < 70000) {
$this->markTestSkipped("Error only exists on PHP 7+");
}
list($promise, , $failer) = $this->promise();
$failer(new \Error);
$promise->onResolve(function ($e) use (&$invoked) {
$this->assertSame(\get_class($e), "Error");
$invoked = true;
});
$this->assertTrue($invoked);
}
/** Implementations MAY fail upon resolution with a Promise, but they definitely MUST NOT return a Promise */
public function testPromiseResolutionWithPromise()
{
list($success, $succeeder) = $this->promise();
$succeeder(true);
list($promise, $succeeder) = $this->promise();
$ex = false;
try {
$succeeder($success);
} catch (\Throwable $e) {
$ex = true;
} catch (\Exception $e) {
$ex = true;
}
if (!$ex) {
$promise->onResolve(function ($e, $v) use (&$invoked) {
$invoked = true;
$this->assertNotInstanceOf(Promise::class, $v);
});
$this->assertTrue($invoked);
}
}
public function testThrowingInCallback()
{
Loop::run(function () {
$invoked = 0;
Loop::setErrorHandler(function () use (&$invoked) {
$invoked++;
});
list($promise, $succeeder) = $this->promise();
$succeeder(true);
$promise->onResolve(function ($e, $v) use (&$invoked, $promise) {
$this->assertNull($e);
$this->assertTrue($v);
$invoked++;
throw new \Exception;
});
list($promise, $succeeder) = $this->promise();
$promise->onResolve(function ($e, $v) use (&$invoked, $promise) {
$this->assertNull($e);
$this->assertTrue($v);
$invoked++;
throw new \Exception;
});
$succeeder(true);
$this->assertSame(4, $invoked);
});
}
public function testThrowingInCallbackContinuesOtherOnResolves()
{
Loop::run(function () {
$invoked = 0;
Loop::setErrorHandler(function () use (&$invoked) {
$invoked++;
});
list($promise, $succeeder) = $this->promise();
$promise->onResolve(function ($e, $v) use (&$invoked, $promise) {
$this->assertNull($e);
$this->assertTrue($v);
$invoked++;
throw new \Exception;
});
$promise->onResolve(function ($e, $v) use (&$invoked, $promise) {
$this->assertNull($e);
$this->assertTrue($v);
$invoked++;
});
$succeeder(true);
$this->assertSame(3, $invoked);
});
}
public function testThrowingInCallbackOnFailure()
{
Loop::run(function () {
$invoked = 0;
Loop::setErrorHandler(function () use (&$invoked) {
$invoked++;
});
list($promise, , $failer) = $this->promise();
$exception = new \Exception;
$failer($exception);
$promise->onResolve(function ($e, $v) use (&$invoked, $exception) {
$this->assertSame($exception, $e);
$this->assertNull($v);
$invoked++;
throw $e;
});
list($promise, , $failer) = $this->promise();
$exception = new \Exception;
$promise->onResolve(function ($e, $v) use (&$invoked, $exception) {
$this->assertSame($exception, $e);
$this->assertNull($v);
$invoked++;
throw $e;
});
$failer($exception);
$this->assertSame(4, $invoked);
});
}
/**
* @requires PHP 7
*/
public function testWeakTypes()
{
$invoked = 0;
list($promise, $succeeder) = $this->promise();
$expectedData = "15.24";
$promise->onResolve(function ($e, int $v) use (&$invoked, $expectedData) {
$invoked++;
$this->assertSame((int) $expectedData, $v);
});
$succeeder($expectedData);
$promise->onResolve(function ($e, int $v) use (&$invoked, $expectedData) {
$invoked++;
$this->assertSame((int) $expectedData, $v);
});
$this->assertSame(2, $invoked);
}
public function testResolvedQueueUnrolling()
{
$count = 50;
$invoked = false;
$promise = new Promise;
$promise->onResolve(function () {
});
$promise->onResolve(function () {
});
$promise->onResolve(function () use (&$invoked) {
$invoked = true;
$this->assertLessThan(30, \count(\debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS)));
});
$last = $promise;
$f = function () use (&$f, &$count, &$last) {
$p = new Promise;
$p->onResolve(function () {
});
$p->onResolve(function () {
});
$last->resolve($p);
$last = $p;
if (--$count > 0) {
$f();
}
};
$f();
$last->resolve();
$this->assertTrue($invoked);
}
/**
* @expectedException \Exception
* @expectedExceptionMessage Success
*/
public function testOnResolveWithReactPromise()
{
Loop::run(function () {
$promise = new Promise;
$promise->onResolve(function ($exception, $value) {
return new RejectedReactPromise(new \Exception("Success"));
});
$promise->resolve();
});
}
/**
* @depends testOnResolveWithReactPromise
* @expectedException \Exception
* @expectedExceptionMessage Success
*/
public function testOnResolveWithReactPromiseAfterResolve()
{
Loop::run(function () {
$promise = new Promise;
$promise->resolve();
$promise->onResolve(function ($exception, $value) {
return new RejectedReactPromise(new \Exception("Success"));
});
});
}
public function testOnResolveWithGenerator()
{
$promise = new Promise;
$invoked = false;
$promise->onResolve(function ($exception, $value) use (&$invoked) {
$invoked = true;
return $value;
yield; // Unreachable, but makes function a generator.
});
$promise->resolve(1);
$this->assertTrue($invoked);
}
/**
* @depends testOnResolveWithGenerator
*/
public function testOnResolveWithGeneratorAfterResolve()
{
$promise = new Promise;
$invoked = false;
$promise->resolve(1);
$promise->onResolve(function ($exception, $value) use (&$invoked) {
$invoked = true;
return $value;
yield; // Unreachable, but makes function a generator.
});
$this->assertTrue($invoked);
}
public function testOnResolveWithGeneratorWithMultipleCallbacks()
{
$promise = new Promise;
$invoked = 0;
$callback = function ($exception, $value) use (&$invoked) {
++$invoked;
return $value;
yield; // Unreachable, but makes function a generator.
};
$promise->onResolve($callback);
$promise->onResolve($callback);
$promise->onResolve($callback);
$promise->resolve(1);
$this->assertSame(3, $invoked);
}
}