feat(locators): Add By.exactBinding locator

lib/clientsidescripts.js

@@ -37,21 +37,30 @@ clientSideScripts.waitForAngular = function(selector, callback) {
  * Find a list of elements in the page by their angular binding.
  *
  * @param {string} binding The binding, e.g. {{cat.name}}.
+ * @param {boolean} exactMatch Whether the binding needs to be matched exactly
  * @param {Element} using The scope of the search.
  *
  * @return {Array.<Element>} The elements containing the binding.
  */
-clientSideScripts.findBindings = function(binding, using) {
+clientSideScripts.findBindings = function(binding, exactMatch, using) {
   using = using || document;
   var bindings = using.getElementsByClassName('ng-binding');
   var matches = [];
   for (var i = 0; i < bindings.length; ++i) {
     var dataBinding = angular.element(bindings[i]).data('$binding');
     if(dataBinding) {
       var bindingName = dataBinding.exp || dataBinding[0].exp || dataBinding;
-      if (bindingName.indexOf(binding) != -1) {
-        matches.push(bindings[i]);
+      if (exactMatch) {
+        var matcher = new RegExp('([^a-zA-Z\d]|$)' + binding + '([^a-zA-Z\d]|^)');
+        if (matcher.test(bindingName)) {
+          matches.push(bindings[i]);
+        }
+      } else {
+        if (bindingName.indexOf(binding) != -1) {
+          matches.push(bindings[i]);
+        }
       }
+
     }
   }
   return matches; /* Return the whole array for webdriver.findElements. */

lib/locators.js

@@ -93,12 +93,32 @@ ProtractorBy.prototype.binding = function(bindingDescriptor) {
     findElementsOverride: function(driver, using) {
       return driver.findElements(
           webdriver.By.js(clientSideScripts.findBindings,
-              bindingDescriptor, using));
+              bindingDescriptor, false, using));
     },
     message: 'by.binding("' + bindingDescriptor + '")'
   };
 };
 
+/**
+ * Find an element by exact binding.
+ *
+ * @alias by.exactBinding()
+ * Same as by.binding() except this does not allow for partial matches
+ *
+ * @param {string} bindingDescriptor
+ * @return {{findElementsOverride: findElementsOverride, message: string}}
+ */
+ProtractorBy.prototype.exactBinding = function(bindingDescriptor) {
+  return {
+    findElementsOverride: function(driver, using) {
+      return driver.findElements(
+          webdriver.By.js(clientSideScripts.findBindings,
+              bindingDescriptor, true, using));
+    },
+    message: 'by.exactBinding("' + bindingDescriptor + '")'
+  };
+};
+
 /**
  * @deprecated Use 'model' instead.
  *

spec/basic/findelements_spec.js

@@ -18,6 +18,18 @@ describe('locators', function() {
       expect(greeting.getText()).toEqual('Hiya');
     });
 
+    it('should find exact match by exactBinding', function() {
+      var greeting = element(by.exactBinding('greeting'));
+
+      expect(greeting.getText()).toEqual('Hiya');
+    });
+
+    it('should not find partial match by exactBinding', function() {
+      var greeting = element(by.exactBinding('greet'));
+
+      expect(greeting.isPresent()).toBe(false);
+    });
+
     it('should find an element by binding with ng-bind attribute',
         function() {
       var name = element(by.binding('username'));