class LoggerChannelTest

class LoggerChannelTest extends UnitTestCase {
  
  /**
   * Tests LoggerChannel::log().
   *
   * @param callable $expected
   *   An anonymous function to use with $this->callback() of the logger mock.
   *   The function should check the $context array for expected values.
   * @param bool $request
   *   Whether to pass a request to the channel under test.
   * @param bool $account
   *   Whether to pass an account to the channel under test.
   *
   * @dataProvider providerTestLog
   * @covers ::log
   * @covers ::setCurrentUser
   * @covers ::setRequestStack
   */
  public function testLog(callable $expected, bool $request = FALSE, bool $account = FALSE) : void {
    $channel = new LoggerChannel('test');
    $message = $this->randomMachineName();
    $logger = $this->createMock('Psr\\Log\\LoggerInterface');
    $logger->expects($this->once())
      ->method('log')
      ->with($this->anything(), $message, $this->callback($expected));
    $channel->addLogger($logger);
    if ($request) {
      $request_mock = $this->getMockBuilder(Request::class)
        ->onlyMethods([
        'getClientIp',
      ])
        ->getMock();
      $request_mock->expects($this->any())
        ->method('getClientIp')
        ->willReturn('127.0.0.1');
      $request_mock->headers = $this->createMock(HeaderBag::class);
      $requestStack = new RequestStack();
      $requestStack->push($request_mock);
      $channel->setRequestStack($requestStack);
    }
    if ($account) {
      $account_mock = $this->createMock(AccountInterface::class);
      $account_mock->expects($this->any())
        ->method('id')
        ->willReturn(1);
      $channel->setCurrentUser($account_mock);
    }
    $channel->log(rand(0, 7), $message);
  }
  
  /**
   * Tests LoggerChannel::log() recursion protection.
   *
   * @covers ::log
   */
  public function testLogRecursionProtection() : void {
    $channel = new LoggerChannel('test');
    $logger = $this->createMock('Psr\\Log\\LoggerInterface');
    $logger->expects($this->exactly(LoggerChannel::MAX_CALL_DEPTH))
      ->method('log');
    $channel->addLogger($logger);
    $channel->addLogger(new NaughtyRecursiveLogger($channel));
    $channel->log(rand(0, 7), $this->randomMachineName());
  }
  
  /**
   * Tests LoggerChannel::addLoggers().
   *
   * @covers ::addLogger
   * @covers ::sortLoggers
   */
  public function testSortLoggers() : void {
    $channel = new LoggerChannel($this->randomMachineName());
    $index_order = '';
    for ($i = 0; $i < 4; $i++) {
      $logger = $this->createMock('Psr\\Log\\LoggerInterface');
      $logger->expects($this->once())
        ->method('log')
        ->willReturnCallback(function () use ($i, &$index_order) {
        // Append the $i to the index order, so that we know the order that
        // loggers got called with.
        $index_order .= $i;
      });
      $channel->addLogger($logger, $i);
    }
    $channel->log(rand(0, 7), $this->randomMachineName());
    // Ensure that the logger added in the end fired first.
    $this->assertEquals('3210', $index_order);
  }
  
  /**
   * Tests that $context['ip'] is a string even when the request's IP is NULL.
   */
  public function testNullIp() : void {
    // Create a logger that will fail if $context['ip'] is not an empty string.
    $logger = $this->createMock(LoggerInterface::class);
    $expected = function ($context) {
      return $context['channel'] == 'test' && $context['ip'] === '';
    };
    $logger->expects($this->once())
      ->method('log')
      ->with($this->anything(), 'Test message', $this->callback($expected));
    // Set up a request stack that has a request that will return NULL when
    // ::getClientIp() is called.
    $requestStack = new RequestStack();
    $request_mock = $this->getMockBuilder(Request::class)
      ->onlyMethods([
      'getClientIp',
    ])
      ->getMock();
    $request_mock->expects($this->any())
      ->method('getClientIp')
      ->willReturn(NULL);
    $requestStack->push($request_mock);
    // Set up the logger channel for testing.
    $channel = new LoggerChannel('test');
    $channel->addLogger($logger);
    $channel->setRequestStack($requestStack);
    // Perform the test.
    $channel->log(rand(0, 7), 'Test message');
  }
  
  /**
   * Data provider for self::testLog().
   */
  public static function providerTestLog() : \Generator {
    // No request or account.
    (yield [
      function ($context) {
        return $context['channel'] == 'test' && empty($context['uid']) && $context['ip'] === '';
      },
      FALSE,
      FALSE,
    ]);
    // With account but not request. Since the request is not available the
    // current user should not be used.
    (yield [
      function ($context) {
        return $context['uid'] === 0 && $context['ip'] === '';
      },
      FALSE,
      TRUE,
    ]);
    // With request but not account.
    (yield [
      function ($context) {
        return $context['ip'] === '127.0.0.1' && empty($context['uid']);
      },
      TRUE,
      FALSE,
    ]);
    // Both request and account.
    (yield [
      function ($context) {
        return $context['ip'] === '127.0.0.1' && $context['uid'] === 1;
      },
      TRUE,
      TRUE,
    ]);
  }

}