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amp/test/MapTest.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

107 lines
2.8 KiB
PHP

<?php
namespace Amp\Test;
use Amp\Emitter;
use Amp\Iterator;
use Amp\Loop;
use Amp\PHPUnit\TestException;
use Amp\Producer;
class MapTest extends BaseTest
{
public function testNoValuesEmitted()
{
$invoked = false;
Loop::run(function () use (&$invoked) {
$emitter = new Emitter;
$iterator = Iterator\map($emitter->iterate(), function ($value) use (&$invoked) {
$invoked = true;
});
$this->assertInstanceOf(Iterator::class, $iterator);
$emitter->complete();
});
$this->assertFalse($invoked);
}
public function testValuesEmitted()
{
Loop::run(function () {
$count = 0;
$values = [1, 2, 3];
$producer = new Producer(function (callable $emit) use ($values) {
foreach ($values as $value) {
yield $emit($value);
}
});
$iterator = Iterator\map($producer, function ($value) use (&$count) {
++$count;
return $value + 1;
});
while (yield $iterator->advance()) {
$this->assertSame(\array_shift($values) + 1, $iterator->getCurrent());
}
$this->assertSame(3, $count);
});
}
/**
* @depends testValuesEmitted
*/
public function testOnNextCallbackThrows()
{
Loop::run(function () {
$values = [1, 2, 3];
$exception = new TestException;
$producer = new Producer(function (callable $emit) use ($values) {
foreach ($values as $value) {
yield $emit($value);
}
});
$iterator = Iterator\map($producer, function () use ($exception) {
throw $exception;
});
try {
yield $iterator->advance();
$this->fail("The exception thrown from the map callback should be thrown from advance()");
} catch (TestException $reason) {
$this->assertSame($reason, $exception);
}
});
}
public function testIteratorFails()
{
Loop::run(function () {
$invoked = false;
$exception = new TestException;
$emitter = new Emitter;
$iterator = Iterator\map($emitter->iterate(), function ($value) use (&$invoked) {
$invoked = true;
});
$emitter->fail($exception);
try {
yield $iterator->advance();
$this->fail("The exception used to fail the iterator should be thrown from advance()");
} catch (TestException $reason) {
$this->assertSame($reason, $exception);
}
$this->assertFalse($invoked);
});
}
}