Fixed Bluetooth keyboard pairing pincode visibility issue.

chrome/test/data/chromeos/oobe_webui_browsertest.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 GEN('#include "chrome/browser/ui/browser.h"');
 GEN('#include "chrome/browser/ui/browser_commands.h"');
 GEN('#include "chrome/browser/ui/exclusive_access/' +
     'fullscreen_controller_test.h"');
 
 /**
@@ skipping 110 matching lines @@
 // other way to initialize the appropriate C++ handlers.
 TEST_F('OobeWebUITest', 'DISABLED_OobeUserImage', function() {
   Oobe.getInstance().showScreen({'id':'user-image'});
 });
 
 // TODO: figure out what state to mock in order for this
 // screen to show up.
 TEST_F('OobeWebUITest', 'DISABLED_OobeAccountPicker', function() {
   Oobe.getInstance().showScreen({'id':'account-picker'});
 });
+
+
+TEST_F('OobeWebUITest', 'HIDDetectionScreenTest', function() {
+  function getPincodeSymbol(i) {
+    return $('hid-keyboard-pincode-sym-' + (i + 1));
+  }
+
+  function getDisplayedPincode() {
+    var pincode  = '';

[Roman Sorokin (ftl), 2015/07/21 12:10:58]

nit: remove one space before '=';

[dzhioev (left Google), 2015/07/21 21:06:06]

Done.

+    for (var i = 0; i < 6; ++i)
+      pincode += getPincodeSymbol(i).textContent;
+    return pincode;
+  }
+
+  login.HIDDetectionScreen.contextChanged({
+    'keyboard-state': 'searching',
+    'mouse-state': 'searching'
+  });
+  Oobe.showScreen({'id': 'hid-detection'});
+  expectTrue($('hid-keyboard-pincode').hidden);
+
+  login.HIDDetectionScreen.contextChanged({
+    'keyboard-state': 'pairing',
+    'keyboard-pincode': '013188'
+  });
+  expectFalse($('hid-keyboard-pincode').hidden);
+  expectEquals('013188', getDisplayedPincode());
+
+  login.HIDDetectionScreen.contextChanged({
+    'num-keys-entered-expected': true,
+    'num-keys-entered-pincode': 3
+  });
+  expectFalse($('hid-keyboard-pincode').hidden);
+  expectEquals('013188', getDisplayedPincode());
+  [
+    { 'key-typed': true },
+    { 'key-typed': true },
+    { 'key-typed': true },
+    { 'key-next': true },
+    { 'key-untyped': true },
+    { 'key-untyped': true },
+    { 'key-untyped': true }  // Enter key symbol.
+  ].forEach(function(expectedClasses, i) {
+    var symbol = getPincodeSymbol(i);
+    ['key-typed', 'key-untyped', 'key-next'].forEach(function(className) {
+      expectEquals(!!expectedClasses[className],
+                   symbol.classList.contains(className));
+    });
+  });
+
+  login.HIDDetectionScreen.contextChanged({
+    'keyboard-state': 'connected'
+  });
+  expectTrue($('hid-keyboard-pincode').hidden);
+});