feat(ngError): add error message compression and better error messages

- add toThrowNg matcher

Author: IgorMinar

angularFiles.js

@@ -5,6 +5,7 @@ angularFiles = {
     'src/AngularPublic.js',
     'src/jqLite.js',
     'src/apis.js',
+    'src/ngError.js',
 
     'src/auto/injector.js',
 

src/Angular.js

@@ -215,7 +215,7 @@ function nextUid() {
 
 /**
  * Set or clear the hashkey for an object.
- * @param obj object 
+ * @param obj object
  * @param h the hashkey (!truthy to delete the hashkey)
  */
 function setHashKey(obj, h) {
@@ -590,7 +590,10 @@ function isLeafNode (node) {
  * @returns {*} The copy or updated `destination`, if `destination` was specified.
  */
 function copy(source, destination){
-  if (isWindow(source) || isScope(source)) throw Error("Can't copy Window or Scope");
+  if (isWindow(source) || isScope(source)) {
+    throw ngError(43, "Can't copy! Making copies of Window or Scope instances is not supported.");
+  }
+
   if (!destination) {
     destination = source;
     if (source) {
@@ -603,7 +606,7 @@ function copy(source, destination){
       }
     }
   } else {
-    if (source === destination) throw Error("Can't copy equivalent objects or arrays");
+    if (source === destination) throw ngError(44, "Can't copy! Source and destination are identical.");
     if (isArray(source)) {
       destination.length = 0;
       for ( var i = 0; i < source.length; i++) {
@@ -1055,7 +1058,7 @@ function bindJQuery() {
  */
 function assertArg(arg, name, reason) {
   if (!arg) {
-    throw new Error("Argument '" + (name || '?') + "' is " + (reason || "required"));
+    throw ngError(45, "Argument '{0}' is {1}", (name || '?'), (reason || "required"));
   }
   return arg;
 }

src/auto/injector.js

@@ -422,7 +422,7 @@ function createInjector(modulesToLoad) {
       },
       providerInjector = (providerCache.$injector =
           createInternalInjector(providerCache, function() {
-            throw Error("Unknown provider: " + path.join(' <- '));
+            throw ngError(1, "Unknown provider: {0}", path.join(' <- '));
           })),
       instanceCache = {},
       instanceInjector = (instanceCache.$injector =
@@ -455,7 +455,7 @@ function createInjector(modulesToLoad) {
       provider_ = providerInjector.instantiate(provider_);
     }
     if (!provider_.$get) {
-      throw Error('Provider ' + name + ' must define $get factory method.');
+      throw ngError(2, "Provider '{0}' must define $get factory method.", name);
     }
     return providerCache[name + providerSuffix] = provider_;
   }
@@ -536,12 +536,9 @@ function createInjector(modulesToLoad) {
   function createInternalInjector(cache, factory) {
 
     function getService(serviceName) {
-      if (typeof serviceName !== 'string') {
-        throw Error('Service name expected');
-      }
       if (cache.hasOwnProperty(serviceName)) {
         if (cache[serviceName] === INSTANTIATING) {
-          throw Error('Circular dependency: ' + path.join(' <- '));
+          throw ngError(4, 'Circular dependency found: {0}', path.join(' <- '));
         }
         return cache[serviceName];
       } else {
@@ -563,6 +560,9 @@ function createInjector(modulesToLoad) {
 
       for(i = 0, length = $inject.length; i < length; i++) {
         key = $inject[i];
+        if (typeof key !== 'string') {
+          throw ngError(3, 'Incorrect injection token! Expected service name as string, got {0}', key);
+        }
         args.push(
           locals && locals.hasOwnProperty(key)
           ? locals[key]

src/jqLite.js

@@ -153,7 +153,7 @@ function JQLite(element) {
   }
   if (!(this instanceof JQLite)) {
     if (isString(element) && element.charAt(0) != '<') {
-      throw Error('selectors not implemented');
+      throw ngError(46, 'Looking up elements via selectors is not supported by jqLite! See: http://docs.angularjs.org/api/angular.element');
     }
     return new JQLite(element);
   }
@@ -627,22 +627,22 @@ forEach({
                 }
               }
               return false;
-            };	
+            };
 
           events[type] = [];
-		
-		  // Refer to jQuery's implementation of mouseenter & mouseleave
+
+          // Refer to jQuery's implementation of mouseenter & mouseleave
           // Read about mouseenter and mouseleave:
           // http://www.quirksmode.org/js/events_mouse.html#link8
-          var eventmap = { mouseleave : "mouseout", mouseenter : "mouseover"}          
+          var eventmap = { mouseleave : "mouseout", mouseenter : "mouseover"};
+
           bindFn(element, eventmap[type], function(event) {
             var ret, target = this, related = event.relatedTarget;
             // For mousenter/leave call the handler if related is outside the target.
             // NB: No relatedTarget if the mouse left/entered the browser window
             if ( !related || (related !== target && !contains(target, related)) ){
               handle(event, type);
-            }	
-
+            }
           });
 
         } else {

src/loader.js

@@ -70,7 +70,7 @@ function setupModuleLoader(window) {
       }
       return ensure(modules, name, function() {
         if (!requires) {
-          throw Error('No module: ' + name);
+          throw ngError(47, "Module '{0}' is not available! You either misspelled the module name or forgot to load it.", name);
         }
 
         /** @type {!Array.<Array.<*>>} */

src/ng/cacheFactory.js

@@ -28,7 +28,7 @@ function $CacheFactoryProvider() {
 
     function cacheFactory(cacheId, options) {
       if (cacheId in caches) {
-        throw Error('cacheId ' + cacheId + ' taken');
+        throw ngError(10, "CacheId '{0}' is already taken!", cacheId);
       }
 
       var size = 0,

src/ng/compile.js

@@ -18,9 +18,6 @@
  */
 
 
-var NON_ASSIGNABLE_MODEL_EXPRESSION = 'Non-assignable model expression: ';
-
-
 /**
  * @ngdoc function
  * @name ng.$compile
@@ -155,7 +152,6 @@ function $CompileProvider($provide) {
       Suffix = 'Directive',
       COMMENT_DIRECTIVE_REGEXP = /^\s*directive\:\s*([\d\w\-_]+)\s+(.*)$/,
       CLASS_DIRECTIVE_REGEXP = /(([\d\w\-_]+)(?:\:([^;]+))?;?)/,
-      MULTI_ROOT_TEMPLATE_ERROR = 'Template must have exactly one root element. was: ',
       urlSanitizationWhitelist = /^\s*(https?|ftp|mailto|file):/;
 
 
@@ -392,10 +388,6 @@ function $CompileProvider($provide) {
       };
     }
 
-    function wrongMode(localName, mode) {
-      throw Error("Unsupported '" + mode + "' for '" + localName + "'.");
-    }
-
     function safeAddClass($element, className) {
       try {
         $element.addClass(className);
@@ -669,7 +661,7 @@ function $CompileProvider($provide) {
             compileNode = $template[0];
 
             if ($template.length != 1 || compileNode.nodeType !== 1) {
-              throw new Error(MULTI_ROOT_TEMPLATE_ERROR + directiveValue);
+              throw ngError(12, "Template for directive '{0}' must have exactly one root element.", directiveName);
             }
 
             replaceWith(jqCollection, $compileNode, compileNode);
@@ -755,7 +747,7 @@ function $CompileProvider($provide) {
           }
           value = $element[retrievalMethod]('$' + require + 'Controller');
           if (!value && !optional) {
-            throw Error("No controller: " + require);
+            throw ngError(13, "Controller '{0}', required by directive '{1}', can't be found!", require, directiveName);
           }
           return value;
         } else if (isArray(require)) {
@@ -783,8 +775,8 @@ function $CompileProvider($provide) {
 
           var parentScope = scope.$parent || scope;
 
-          forEach(newIsolateScopeDirective.scope, function(definiton, scopeName) {
-            var match = definiton.match(LOCAL_REGEXP) || [],
+          forEach(newIsolateScopeDirective.scope, function(definition, scopeName) {
+            var match = definition.match(LOCAL_REGEXP) || [],
                 attrName = match[3] || scopeName,
                 optional = (match[2] == '?'),
                 mode = match[1], // @, =, or &
@@ -815,8 +807,8 @@ function $CompileProvider($provide) {
                 parentSet = parentGet.assign || function() {
                   // reset the change, or we will throw this exception on every $digest
                   lastValue = scope[scopeName] = parentGet(parentScope);
-                  throw Error(NON_ASSIGNABLE_MODEL_EXPRESSION + attrs[attrName] +
-                      ' (directive: ' + newIsolateScopeDirective.name + ')');
+                  throw ngError(14, "Expression '{0}' used with directive '{1}' is non-assignable!",
+                      attrs[attrName], newIsolateScopeDirective.name);
                 };
                 lastValue = scope[scopeName] = parentGet(parentScope);
                 scope.$watch(function parentValueWatch() {
@@ -846,8 +838,8 @@ function $CompileProvider($provide) {
               }
 
               default: {
-                throw Error('Invalid isolate scope definition for directive ' +
-                    newIsolateScopeDirective.name + ': ' + definiton);
+                throw ngError(15, "Invalid isolate scope definition for directive '{0}'. Definition: {... {1}: '{2}' ...}",
+                    newIsolateScopeDirective.name, scopeName, definition);
               }
             }
           });
@@ -1000,7 +992,8 @@ function $CompileProvider($provide) {
             compileNode = $template[0];
 
             if ($template.length != 1 || compileNode.nodeType !== 1) {
-              throw new Error(MULTI_ROOT_TEMPLATE_ERROR + content);
+              throw ngError(16, "Template for directive '{0}' must have exactly one root element. Template: {1}",
+                  origAsyncDirective.name, templateUrl);
             }
 
             tempTemplateAttrs = {$attr: {}};
@@ -1037,7 +1030,7 @@ function $CompileProvider($provide) {
           linkQueue = null;
         }).
         error(function(response, code, headers, config) {
-          throw Error('Failed to load template: ' + config.url);
+          throw ngError(17, 'Failed to load template: {0}', config.url);
         });
 
       return function delayedNodeLinkFn(ignoreChildLinkFn, scope, node, rootElement, controller) {
@@ -1065,8 +1058,8 @@ function $CompileProvider($provide) {
 
     function assertNoDuplicate(what, previousDirective, directive, element) {
       if (previousDirective) {
-        throw Error('Multiple directives [' + previousDirective.name + ', ' +
-          directive.name + '] asking for ' + what + ' on: ' +  startingTag(element));
+        throw ngError(18, 'Multiple directives [{0}, {1}] asking for {2} on: {3}',
+            previousDirective.name, directive.name, what, startingTag(element));
       }
     }
 

src/ng/controller.js

@@ -74,9 +74,8 @@ function $ControllerProvider() {
       instance = $injector.instantiate(expression, locals);
 
       if (identifier) {
-        if (typeof locals.$scope !== 'object') {
-          throw new Error('Can not export controller as "' + identifier + '". ' +
-              'No scope object provided!');
+        if (!(locals && typeof locals.$scope == 'object')) {
+          throw ngError(47, "Cannot export controller '{0}' as '{1}'! No $scope object provided via `locals`.", constructor || expression.name, identifier);
         }
 
         locals.$scope[identifier] = instance;

src/ng/directive/input.js

@@ -475,7 +475,8 @@ function textInputType(scope, element, attr, ctrl, $sniffer, $browser) {
         var patternObj = scope.$eval(pattern);
 
         if (!patternObj || !patternObj.test) {
-          throw new Error('Expected ' + pattern + ' to be a RegExp but was ' + patternObj);
+          throw ngError(5, 'ngPattern error! Expected {0} to be a RegExp but was {1}. Element: {2}',
+                                                      pattern,                   patternObj,   startingTag(element));
         }
         return validate(patternObj, value);
       };
@@ -918,8 +919,8 @@ var NgModelController = ['$scope', '$exceptionHandler', '$attrs', '$element', '$
       ngModelSet = ngModelGet.assign;
 
   if (!ngModelSet) {
-    throw Error(NON_ASSIGNABLE_MODEL_EXPRESSION + $attr.ngModel +
-        ' (' + startingTag($element) + ')');
+    throw ngError(6, "ngModel error! Expression '{0}' is non-assignable. Element: {1}", $attr.ngModel,
+        startingTag($element));
   }
 
   /**

src/ng/directive/ngRepeat.js

@@ -157,8 +157,8 @@ var ngRepeatDirective = ['$parse', '$animator', function($parse, $animator) {
           hashFnLocals = {$id: hashKey};
 
         if (!match) {
-          throw Error("Expected ngRepeat in form of '_item_ in _collection_[ track by _id_]' but got '" +
-            expression + "'.");
+          throw ngError(7, "ngRepeat error! Expected expression in form of '_item_ in _collection_[ track by _id_]' but got '{0}'.",
+            expression);
         }
 
         lhs = match[1];
@@ -182,8 +182,8 @@ var ngRepeatDirective = ['$parse', '$animator', function($parse, $animator) {
 
         match = lhs.match(/^(?:([\$\w]+)|\(([\$\w]+)\s*,\s*([\$\w]+)\))$/);
         if (!match) {
-          throw Error("'item' in 'item in collection' should be identifier or (key, value) but got '" +
-              lhs + "'.");
+          throw ngError(8, "ngRepeat error! '_item_' in '_item_ in _collection_' should be an identifier or '(_key_, _value_)' expression, but got '{0}'.",
+                                                                    lhs);
         }
         valueIdentifier = match[3] || match[1];
         keyIdentifier = match[2];
@@ -244,8 +244,8 @@ var ngRepeatDirective = ['$parse', '$animator', function($parse, $animator) {
                if (block && block.element) lastBlockMap[block.id] = block;
              });
              // This is a duplicate and we need to throw an error
-             throw new Error('Duplicates in a repeater are not allowed. Repeater: ' + expression +
-                 ' key: ' + trackById);
+             throw ngError(50, "ngRepeat error! Duplicates in a repeater are not allowed. Use 'track by' expression to specify unique keys. Repeater: {0}, Duplicate key: {1}",
+                                                                                                                                                    expression,       trackById);
            } else {
              // new never before seen block
              nextBlockOrder[index] = { id: trackById };