angular.js/test/ng/logSpec.js

'use strict';

function initService(debugEnabled) {
    return module(function($logProvider){
      $logProvider.debugEnabled(debugEnabled);
    });
  }

describe('$log', function() {
  var $window, logger, log, warn, info, error, debug;



  beforeEach(module(function($provide){
    $window = {navigator: {}, document: {}};
    logger = '';
    log = function() { logger+= 'log;'; };
    warn = function() { logger+= 'warn;'; };
    info = function() { logger+= 'info;'; };
    error = function() { logger+= 'error;'; };
    debug = function() { logger+= 'debug;'; };

    $provide.provider('$log', $LogProvider);
    $provide.value('$exceptionHandler', angular.mock.rethrow);
    $provide.value('$window', $window);
  }));

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


  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();
      $log.debug();
      expect(logger).toEqual('log;log;log;log;log;');
    }
  ));


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


  it("should work in IE where console.error doesn't have apply method", inject(
      function() {
        log.apply = log.call =
            warn.apply = warn.call =
            info.apply = info.call =
            error.apply = error.call =
            debug.apply = debug.call = null;

        $window.console = {log: log,
                           warn: warn,
                           info: info,
                           error: error,
                           debug: debug};
      },
      function($log) {
        $log.log.apply($log);
        $log.warn.apply($log);
        $log.info.apply($log);
        $log.error.apply($log);
        $log.debug.apply($log);
        expect(logger).toEqual('log;warn;info;error;debug;');
      })
  );

  describe("$log.debug", function () {
	 
	  beforeEach(initService(false));
	  
	  it("should skip debugging output if disabled", inject(
	    function(){
	      $window.console = {log: log,
	                         warn: warn,
	                         info: info,
	                         error: error,
	                         debug: debug};
	    }, 
	    function($log) {
	      $log.log();
	      $log.warn();
	      $log.info();
	      $log.error();
	      $log.debug();
	      expect(logger).toEqual('log;warn;info;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 = new $LogProvider().$get[1]({console:{error:function() {
        errorArgs = [].slice.call(arguments, 0);
      }}});
    });


    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']);
    });
  });
});