angular.js/test/service/logSpec.js

'use strict';

describe('$log', function() {
  var $window;
  var logger;

  function log() { logger+= 'log;'; }
  function warn() { logger+= 'warn;'; }
  function info() { logger+= 'info;'; }
  function error() { logger+= 'error;'; }

  beforeEach(inject(function(service){
    $window = {};
    logger = '';
    service('$log', $logFactory);
    service('$exceptionHandler', valueFn(rethrow));
    service('$window', valueFn($window));
  }));

  it('should use console if present', inject(
    function(){
      $window.console = {log: log,
                         warn: warn,
                         info: info,
                         error: error};
    },
    function($log) {
      $log.log();
      $log.warn();
      $log.info();
      $log.error();
      expect(logger).toEqual('log;warn;info;error;');
    }
  ));


  it('should use console.log() if other not present', inject(
    function(){
      $window.console = {log: log};
    },
    function($log) {
      $log.log();
      $log.warn();
      $log.info();
      $log.error();
      expect(logger).toEqual('log;log;log;log;');
    }
  ));


  it('should use noop if no console', inject(
    function($log) {
      $log.log();
      $log.warn();
      $log.info();
      $log.error();
    }
  ));


  describe('$log.error', function() {
    var e, $log, errorArgs;

    beforeEach(function() {
      e = new Error('');
      e.message = undefined;
      e.sourceURL = undefined;
      e.line = undefined;
      e.stack = undefined;

      $log = $logFactory({console:{error:function() {
        errorArgs = arguments;
      }}});
    });


    it('should pass error if does not have trace', function() {
      $log.error('abc', e);
      expect(errorArgs).toEqual(['abc', e]);
    });


    it('should print stack', function() {
      e.stack = 'stack';
      $log.error('abc', e);
      expect(errorArgs).toEqual(['abc', 'stack']);
    });


    it('should print line', function() {
      e.message = 'message';
      e.sourceURL = 'sourceURL';
      e.line = '123';
      $log.error('abc', e);
      expect(errorArgs).toEqual(['abc', 'message\nsourceURL:123']);
    });
  });
});