updated waitUntilExists functionality

Author: DavertMik

docs/pageobjects.md

@@ -231,9 +231,6 @@ At initialization you were asked to create custom steps file. If you accepted th
 See how `login` method can be added to `I`:
 
 ```js
-'use strict';
-// in this file you can append custom step methods to 'I' object
-
 module.exports = function() {
   return actor({
 
@@ -248,4 +245,36 @@ module.exports = function() {
 
 Please notice that instead of `I` you should use `this` in current context.
 
+## Dependency Injection
+
+### Configuration
+
+All objects described here are injected with Dependency Injection. The similar way it happens in AngularJS framework.
+If you want an object to be injected in scenario by its name add it to configuration:
+
+```js
+  "include": {
+    "I": "./custom_steps.js",
+    "Smth": "./pages/Smth.js",
+    "loginPage": "./pages/Login.js",
+    "signinFragment": "./fragments/Signin.js"
+  }
+```
+
+Now this objects can be retrieved by the name specified in configuration.
+CodeceptJS generator commands (like `codeceptjs gpo`) will update configuration for you.
+
+### Dynamic Injection
+
+You can inject objects per test by calling `injectDependencies` function on Scenario:
+
+```js
+Scenario('search @grop', (I, Data) => {
+  I.fillField('Username', Data.username);
+  I.pressKey('Enter');
+}).injectDependencies({ Data: require('./data.js') });
+```
+
+This requires `./data.js` module and assigns it to `Data` argument in a test.
+
 ### done()

docs/webapi/waitUntilExists.mustache

@@ -1,4 +1,4 @@
-Waits for element not to be present on page (by default waits for 1sec).
+Waits for element to be present on page (by default waits for 1sec).
 Element can be located by CSS or XPath.
 
 ```js

lib/helper/WebDriverIO.js

@@ -1425,7 +1425,7 @@ class WebDriverIO extends Helper {
    */
   async waitUntilExists(locator, sec = null) {
     const aSec = sec || this.options.waitForTimeout;
-    return this.browser.waitForExist(locator, aSec * 1000);
+    return this.browser.waitForExist(withStrictLocator.call(this, locator), aSec * 1000);
   }
 
 
@@ -1599,6 +1599,14 @@ class WebDriverIO extends Helper {
    * Appium: support
    */
   async waitForStalenessOf(locator, sec = null) {
+    return this.waitUntilNotExists(locator, sec);
+  }
+
+  /**
+   * {{> ../webapi/waitForStalenessOf }}
+   * Appium: support
+   */
+  async waitUntilNotExists(locator, sec = null) {
     const aSec = sec || this.options.waitForTimeout;
     return this.browser.waitUntil(async () => {
       const res = await this.browser.elements(withStrictLocator.call(this, locator));