[js] Minimize window and fullscreen window APIs

For #4290

javascript/node/selenium-webdriver/CHANGES.md

@@ -12,6 +12,8 @@ mode.
 
 ### API Changes
 
+* Added `webdriver.manage().window().minimize()`
+* Added `webdriver.manage().window().fullscreen()`
 * The core WebDriver API no longer uses promise manager
   - Removed `index.Builder#setControlFlow()`
   - The following thenable types no longer have a `cancel()` method:
@@ -34,10 +36,11 @@ mode.
 
 ### Changes for W3C WebDriver Spec Compliance
 
-Revamped the actions API to conform with the WebDriver Spec:
-<https://www.w3.org/TR/webdriver/#actions>. For details, refer to the JS doc
-on the `lib/webdriver.ActionSequence` class. For simplicity, support for the
-legacy actions API has been removed.
+*  Revamped the actions API to conform with the WebDriver Spec:
+   <https://www.w3.org/TR/webdriver/#actions>. For details, refer to the JS doc
+   on the `lib/webdriver.ActionSequence` class. For simplicity, support for the
+   legacy actions API has been removed.
+*  Added supported for minimizing windows and toggling fullscreen.
 
 
 ## v3.6.0

javascript/node/selenium-webdriver/lib/command.js

@@ -124,6 +124,8 @@ const Name = {
   GET_WINDOW_SIZE: 'getWindowSize',
   SET_WINDOW_SIZE: 'setWindowSize',
   MAXIMIZE_WINDOW: 'maximizeWindow',
+  MINIMIZE_WINDOW: 'minimizeWindow',
+  FULLSCREEN_WINDOW: 'fullscreenWindow',
 
   SWITCH_TO_WINDOW: 'switchToWindow',
   SWITCH_TO_FRAME: 'switchToFrame',

javascript/node/selenium-webdriver/lib/http.js

@@ -258,6 +258,8 @@ const W3C_COMMAND_MAP = new Map([
   [cmd.Name.EXECUTE_SCRIPT, post('/session/:sessionId/execute/sync')],
   [cmd.Name.EXECUTE_ASYNC_SCRIPT, post('/session/:sessionId/execute/async')],
   [cmd.Name.MAXIMIZE_WINDOW, post('/session/:sessionId/window/maximize')],
+  [cmd.Name.MINIMIZE_WINDOW, post('/session/:sessionId/window/minimize')],
+  [cmd.Name.FULLSCREEN_WINDOW, post('/session/:sessionId/window/fullscreen')],
   [cmd.Name.GET_WINDOW_POSITION, get('/session/:sessionId/window/position')],
   [cmd.Name.SET_WINDOW_POSITION, post('/session/:sessionId/window/position')],
   [cmd.Name.GET_WINDOW_SIZE, get('/session/:sessionId/window/size')],

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

@@ -1592,15 +1592,46 @@ class Window {
   }
 
   /**
-   * Maximizes the current window.
-   * @return {!Promise<void>} A promise that will be resolved
-   *     when the command has completed.
+   * Maximizes the current window. The exact behavior of this command is
+   * specific to individual window managers, but typically involves increasing
+   * the window to the maximum available size without going full-screen.
+   *
+   * @return {!Promise<void>} A promise that will be resolved when the command
+   *     has completed.
    */
   maximize() {
     return this.driver_.execute(
         new command.Command(command.Name.MAXIMIZE_WINDOW).
             setParameter('windowHandle', 'current'));
   }
+
+  /**
+   * Minimizes the current window. The exact behavior of this command is
+   * specific to individual window managers, but typicallly involves hiding
+   * the window in the system tray.
+   *
+   * @return {!Promise<void>} A promise that will be resolved when the command
+   *     has completed.
+   */
+  minimize() {
+    return this.driver_.execute(
+        new command.Command(command.Name.MINIMIZE_WINDOW));
+  }
+
+  /**
+   * Invokes the "full screen" operation on the current window. The exact
+   * behavior of this command is specific to individual window managers, but
+   * this will typically increase the window size to the size of the physical
+   * display and hide the browser chrome.
+   *
+   * @return {!Promise<void>} A promise that will be resolved when the command
+   *     has completed.
+   * @see <https://fullscreen.spec.whatwg.org/#fullscreen-an-element>
+   */
+  fullscreen() {
+    return this.driver_.execute(
+        new command.Command(command.Name.FULLSCREEN_WINDOW));
+  }
 }