Adding common conditions for explicit waits in WebDriverJS

Similar in concept to ExpectedConditions from Java:

    driver.wait(until.elementLocated(By.id('foo'), 2000)
        .then(function(el) { el.click(); });
    driver.wait(until.titleIs('Hello, world!'), 5000);

Fixes issue 5855

Author: jleyba

javascript/node/selenium-webdriver/CHANGES.md

@@ -1,3 +1,13 @@
+## v2.44.0-dev
+
+* FIXED: 8000: `Builder.forBrowser()` now accepts an empty string since some
+    WebDriver implementations ignore the value. A value must still be specified,
+    however, since it is a required field in WebDriver's wire protocol.
+* FIXED: 7994: The `stacktrace` module will not modify stack traces if the
+    initial parse fails (e.g. the user defined `Error.prepareStackTrace`)
+* FIXED: 5855: Added a module (`until`) that defines several common conditions 
+    for use with explicit waits. See updated examples for usage.
+
 ## v2.43.5
 
 * FIXED: 7905: `Builder.usingServer(url)` once again returns `this` for

javascript/node/selenium-webdriver/README.md

@@ -33,21 +33,16 @@ comma-separated list of browsers you wish to test against. For example:
 ## Usage
 
 
-    var webdriver = require('selenium-webdriver');
+    var By = require('selenium-webdriver').By,
+        until = require('selenium-webdriver').until,
+        firefox = require('selenium-webdriver/firefox');
 
-    var driver = new webdriver.Builder().
-        withCapabilities(webdriver.Capabilities.chrome()).
-        build();
-
-    driver.get('http://www.google.com');
-    driver.findElement(webdriver.By.name('q')).sendKeys('webdriver');
-    driver.findElement(webdriver.By.name('btnG')).click();
-    driver.wait(function() {
-      return driver.getTitle().then(function(title) {
-        return title === 'webdriver - Google Search';
-      });
-    }, 1000);
+    var driver = new firefox.Driver();
 
+    driver.get('http://www.google.com/ncr');
+    driver.findElement(By.name('q')).sendKeys('webdriver');
+    driver.findElement(By.name('btnG')).click();
+    driver.wait(until.titleIs('webdriver - Google Search'), 1000);
     driver.quit();
 
 ## Documentation

javascript/node/selenium-webdriver/example/google_search.js

@@ -19,22 +19,14 @@
  * Usage: node selenium-webdriver/example/google_search.js
  */
 
-var fs = require('fs');
+var By = require('..').By,
+    until = require('..').until,
+    firefox = require('../firefox');
 
-var webdriver = require('..'),
-    remote = require('../remote');
+var driver = new firefox.Driver();
 
-var driver = new webdriver.Builder().
-    withCapabilities(webdriver.Capabilities.chrome()).
-    build();
-
-driver.get('http://www.google.com');
-driver.findElement(webdriver.By.name('q')).sendKeys('webdriver');
-driver.findElement(webdriver.By.name('btnG')).click();
-driver.wait(function() {
-  return driver.getTitle().then(function(title) {
-    return 'webdriver - Google Search' === title;
-  });
-}, 1000);
-
-driver.quit();
+driver.get('http://www.google.com/ncr');
+driver.findElement(By.name('q')).sendKeys('webdriver');
+driver.findElement(By.name('btnG')).click();
+driver.wait(until.titleIs('webdriver - Google Search'), 1000);
+driver.quit();

javascript/node/selenium-webdriver/example/google_search_generator.js

@@ -21,18 +21,17 @@
  *     selenium-webdriver/example/google_search_generator.js
  */
 
-var webdriver = require('..');
+var By = require('..').By,
+    firefox = require('../firefox');
 
-var driver = new webdriver.Builder().
-    withCapabilities(webdriver.Capabilities.chrome()).
-    build();
+var driver = new firefox.Driver();
 
-driver.get('http://www.google.com');
+driver.get('http://www.google.com/ncr');
 driver.call(function* () {
-  var query = yield driver.findElement(webdriver.By.name('q'));
+  var query = yield driver.findElement(By.name('q'));
   query.sendKeys('webdriver');
 
-  var submit = yield driver.findElement(webdriver.By.name('btnG'));
+  var submit = yield driver.findElement(By.name('btnG'));
   submit.click();
 });
 

javascript/node/selenium-webdriver/example/google_search_test.js

@@ -14,36 +14,28 @@
 // limitations under the License.
 
 /**
- * @fileoverview An example test that may be run using Mocha. To run, you must
- * have the chromedriver installed on the system PATH.
+ * @fileoverview An example test that may be run using Mocha.
+ * Usage: mocha -t 10000 selenium-webdriver/example/google_search_test.js
  */
 
-var assert = require('assert'),
-    fs = require('fs');
-
-var webdriver = require('..'),
-    test = require('../testing'),
-    remote = require('../remote');
+var By = require('..').By,
+    until = require('..').until,
+    firefox = require('../firefox'),
+    test = require('../testing');
 
 
 test.describe('Google Search', function() {
   var driver;
 
   test.before(function() {
-    driver = new webdriver.Builder().
-        withCapabilities(webdriver.Capabilities.chrome()).
-        build();
+    driver = new firefox.Driver();
   });
 
   test.it('should append query to title', function() {
     driver.get('http://www.google.com');
-    driver.findElement(webdriver.By.name('q')).sendKeys('webdriver');
-    driver.findElement(webdriver.By.name('btnG')).click();
-    driver.wait(function() {
-      return driver.getTitle().then(function(title) {
-        return 'webdriver - Google Search' === title;
-      });
-    }, 1000);
+    driver.findElement(By.name('q')).sendKeys('webdriver');
+    driver.findElement(By.name('btnG')).click();
+    driver.wait(until.titleIs('webdriver - Google Search'), 1000);
   });
 
   test.after(function() { driver.quit(); });

javascript/node/selenium-webdriver/example/parallel_flows.js

@@ -18,7 +18,8 @@
  * in parallel in separate control flows.
  */
 
-var webdriver = require('..');
+var webdriver = require('..'),
+    until = webdriver.until;
 
 for (var i = 0; i < 3; i++) {
   (function(n) {
@@ -28,7 +29,7 @@ for (var i = 0; i < 3; i++) {
         });
 
     var driver = new webdriver.Builder().
-        withCapabilities(webdriver.Capabilities.chrome()).
+        withCapabilities(webdriver.Capabilities.firefox()).
         setControlFlow(flow).  // Comment out this line to see the difference.
         build();
 
@@ -39,11 +40,7 @@ for (var i = 0; i < 3; i++) {
     driver.get('http://www.google.com');
     driver.findElement(webdriver.By.name('q')).sendKeys('webdriver');
     driver.findElement(webdriver.By.name('btnG')).click();
-    driver.wait(function() {
-      return driver.getTitle().then(function(title) {
-        return 'webdriver - Google Search' === title;
-      });
-    }, 1000);
+    driver.wait(until.titleIs('webdriver - Google Search'), 1000);
 
     driver.quit();
   })(i);

javascript/node/selenium-webdriver/index.js

@@ -130,3 +130,9 @@ exports.WebElementPromise = base.require('webdriver.WebElementPromise');
 (exports.__defineGetter__('stacktrace', function() {
   return base.exportPublicApi('webdriver.stacktrace');
 }));
+
+
+/** @type {webdriver.until.} */
+(exports.__defineGetter__('until', function() {
+  return base.exportPublicApi('webdriver.until');
+}));

javascript/node/selenium-webdriver/lib/test/index.js

@@ -171,14 +171,6 @@ function TestEnvironment(browserName, server) {
       return d.quit();
     }
   };
-
-  this.waitForTitleToBe = function(expected) {
-    driver.wait(function() {
-      return driver.getTitle().then(function(title) {
-        return title === expected;
-      });
-    }, 5000, 'Waiting for title to be ' + expected);
-  };
 }
 
 

javascript/node/selenium-webdriver/package.json

@@ -1,6 +1,6 @@
 {
     "name": "selenium-webdriver",
-    "version": "2.43.5",
+    "version": "2.44.0-dev",
     "description": "The official WebDriver JavaScript bindings from the Selenium project",
     "keywords": [
         "automation",

javascript/node/selenium-webdriver/test/element_finding_test.js

@@ -19,15 +19,15 @@ var fail = require('assert').fail;
 
 var By = require('..').By,
     error = require('..').error,
+    until = require('..').until,
     test = require('../lib/test'),
     assert = require('../testing/assert'),
     Browser = test.Browser,
     Pages = test.Pages;
 
 
 test.suite(function(env) {
-  var browsers = env.browsers,
-      waitForTitleToBe = env.waitForTitleToBe;
+  var browsers = env.browsers;
 
   var driver;
   beforeEach(function() { driver = env.driver; });
@@ -40,14 +40,14 @@ test.suite(function(env) {
           driver.get(Pages.formPage);
           driver.get(Pages.xhtmlTestPage);
           driver.findElement(By.linkText('click me')).click();
-          waitForTitleToBe('We Arrive Here');
+          driver.wait(until.titleIs('We Arrive Here'), 5000);
         });
 
     describe('By.id()', function() {
       test.it('should work', function() {
         driver.get(Pages.xhtmlTestPage);
         driver.findElement(By.id('linkId')).click();
-        waitForTitleToBe('We Arrive Here');
+        driver.wait(until.titleIs('We Arrive Here'), 5000);
       });
 
       test.it('should fail if ID not present on page', function() {
@@ -73,14 +73,14 @@ test.suite(function(env) {
       test.it('should be able to click on link identified by text', function() {
         driver.get(Pages.xhtmlTestPage);
         driver.findElement(By.linkText('click me')).click();
-        waitForTitleToBe('We Arrive Here');
+        driver.wait(until.titleIs('We Arrive Here'), 5000);
       });
 
       test.it(
         'should be able to find elements by partial link text', function() {
           driver.get(Pages.xhtmlTestPage);
           driver.findElement(By.partialLinkText('ick me')).click();
-          waitForTitleToBe('We Arrive Here');
+          driver.wait(until.titleIs('We Arrive Here'), 5000);
         });
 
       test.it('should work when link text contains equals sign', function() {