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IteratorFromIterableTest.php
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IteratorFromIterableTest.php
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<?php
namespace Amp\Test;
use Amp\Failure;
use Amp\Iterator;
use Amp\Loop;
use Amp\Pause;
use Amp\Success;
class IteratorFromIterableTest extends \PHPUnit\Framework\TestCase {
const TIMEOUT = 10;
public function testSuccessfulPromises() {
Loop::run(function () {
$expected = \range(1, 3);
$iterator = Iterator\fromIterable([new Success(1), new Success(2), new Success(3)]);
while (yield $iterator->advance()) {
$this->assertSame(\array_shift($expected), $iterator->getCurrent());
}
});
}
public function testFailedPromises() {
Loop::run(function () {
$exception = new \Exception;
$iterator = Iterator\fromIterable([new Failure($exception), new Failure($exception)]);
try {
yield $iterator->advance();
} catch (\Exception $reason) {
$this->assertSame($exception, $reason);
}
});
}
public function testMixedPromises() {
Loop::run(function () {
$exception = new \Exception;
$expected = \range(1, 2);
$iterator = Iterator\fromIterable([new Success(1), new Success(2), new Failure($exception), new Success(4)]);
try {
while (yield $iterator->advance()) {
$this->assertSame(\array_shift($expected), $iterator->getCurrent());
}
} catch (\Exception $reason) {
$this->assertSame($exception, $reason);
}
$this->assertEmpty($expected);
});
}
public function testPendingPromises() {
Loop::run(function () {
$expected = \range(1, 4);
$iterator = Iterator\fromIterable([new Pause(30, 1), new Pause(10, 2), new Pause(20, 3), new Success(4)]);
while (yield $iterator->advance()) {
$this->assertSame(\array_shift($expected), $iterator->getCurrent());
}
});
}
public function testTraversable() {
Loop::run(function () {
$expected = \range(1, 4);
$generator = (function () {
foreach (\range(1, 4) as $value) {
yield $value;
}
})();
$iterator = Iterator\fromIterable($generator);
while (yield $iterator->advance()) {
$this->assertSame(\array_shift($expected), $iterator->getCurrent());
}
$this->assertEmpty($expected);
});
}
/**
* @expectedException \TypeError
* @dataProvider provideInvalidStreamArguments
*/
public function testInvalid($arg) {
Iterator\fromIterable($arg);
}
public function provideInvalidStreamArguments() {
return [
[null],
[new \stdClass],
[32],
[false],
[true],
["string"],
];
}
public function testInterval() {
Loop::run(function () {
$count = 3;
$iterator = Iterator\fromIterable(range(1, $count), self::TIMEOUT);
$i = 0;
while (yield $iterator->advance()) {
$this->assertSame(++$i, $iterator->getCurrent());
}
$this->assertSame($count, $i);
});
}
/**
* @depends testInterval
*/
public function testSlowConsumer() {
$count = 5;
Loop::run(function () use ($count) {
$iterator = Iterator\fromIterable(range(1, $count), self::TIMEOUT);
for ($i = 0; yield $iterator->advance(); ++$i) {
yield new Pause(self::TIMEOUT * 2);
}
$this->assertSame($count, $i);
});
}
}