abstract class LoggerInterfaceTest

abstract class LoggerInterfaceTest extends \PHPUnit_Framework_TestCase {

  /**
   * @return LoggerInterface
   */
  abstract function getLogger();

  /**
   * This must return the log messages in order with a simple formatting: "<LOG LEVEL> <MESSAGE>"
   *
   * Example ->error('Foo') would yield "error Foo"
   *
   * @return string[]
   */
  abstract function getLogs();
  public function testImplements() {
    $this
      ->assertInstanceOf('Psr\\Log\\LoggerInterface', $this
      ->getLogger());
  }

  /**
   * @dataProvider provideLevelsAndMessages
   */
  public function testLogsAtAllLevels($level, $message) {
    $logger = $this
      ->getLogger();
    $logger
      ->{$level}($message, array(
      'user' => 'Bob',
    ));
    $logger
      ->log($level, $message, array(
      'user' => 'Bob',
    ));
    $expected = array(
      $level . ' message of level ' . $level . ' with context: Bob',
      $level . ' message of level ' . $level . ' with context: Bob',
    );
    $this
      ->assertEquals($expected, $this
      ->getLogs());
  }
  public function provideLevelsAndMessages() {
    return array(
      LogLevel::EMERGENCY => array(
        LogLevel::EMERGENCY,
        'message of level emergency with context: {user}',
      ),
      LogLevel::ALERT => array(
        LogLevel::ALERT,
        'message of level alert with context: {user}',
      ),
      LogLevel::CRITICAL => array(
        LogLevel::CRITICAL,
        'message of level critical with context: {user}',
      ),
      LogLevel::ERROR => array(
        LogLevel::ERROR,
        'message of level error with context: {user}',
      ),
      LogLevel::WARNING => array(
        LogLevel::WARNING,
        'message of level warning with context: {user}',
      ),
      LogLevel::NOTICE => array(
        LogLevel::NOTICE,
        'message of level notice with context: {user}',
      ),
      LogLevel::INFO => array(
        LogLevel::INFO,
        'message of level info with context: {user}',
      ),
      LogLevel::DEBUG => array(
        LogLevel::DEBUG,
        'message of level debug with context: {user}',
      ),
    );
  }

  /**
   * @expectedException Psr\Log\InvalidArgumentException
   */
  public function testThrowsOnInvalidLevel() {
    $logger = $this
      ->getLogger();
    $logger
      ->log('invalid level', 'Foo');
  }
  public function testContextReplacement() {
    $logger = $this
      ->getLogger();
    $logger
      ->info('{Message {nothing} {user} {foo.bar} a}', array(
      'user' => 'Bob',
      'foo.bar' => 'Bar',
    ));
    $expected = array(
      'info {Message {nothing} Bob Bar a}',
    );
    $this
      ->assertEquals($expected, $this
      ->getLogs());
  }
  public function testObjectCastToString() {
    $dummy = $this
      ->getMock('Psr\\Log\\Test\\DummyTest', array(
      '__toString',
    ));
    $dummy
      ->expects($this
      ->once())
      ->method('__toString')
      ->will($this
      ->returnValue('DUMMY'));
    $this
      ->getLogger()
      ->warning($dummy);
  }
  public function testContextCanContainAnything() {
    $context = array(
      'bool' => true,
      'null' => null,
      'string' => 'Foo',
      'int' => 0,
      'float' => 0.5,
      'nested' => array(
        'with object' => new DummyTest(),
      ),
      'object' => new \DateTime(),
      'resource' => fopen('php://memory', 'r'),
    );
    $this
      ->getLogger()
      ->warning('Crazy context data', $context);
  }
  public function testContextExceptionKeyCanBeExceptionOrOtherValues() {
    $this
      ->getLogger()
      ->warning('Random message', array(
      'exception' => 'oops',
    ));
    $this
      ->getLogger()
      ->critical('Uncaught Exception!', array(
      'exception' => new \LogicException('Fail'),
    ));
  }

}