Add m-esr52 at 52.6.0

1 files changed, 840 insertions, 0 deletions

diff --git a/devtools/client/inspector/rules/test/head.js b/devtools/client/inspector/rules/test/head.js
new file mode 100644
index 000000000..5e5ede09b
--- /dev/null
+++ b/devtools/client/inspector/rules/test/head.js
@@ -0,0 +1,840 @@
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+/* eslint no-unused-vars: [2, {"vars": "local"}] */
+/* import-globals-from ../../test/head.js */
+"use strict";
+
+// Import the inspector's head.js first (which itself imports shared-head.js).
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/devtools/client/inspector/test/head.js",
+  this);
+
+registerCleanupFunction(() => {
+  Services.prefs.clearUserPref("devtools.defaultColorUnit");
+});
+
+var {getInplaceEditorForSpan: inplaceEditor} =
+  require("devtools/client/shared/inplace-editor");
+
+const ROOT_TEST_DIR = getRootDirectory(gTestPath);
+const FRAME_SCRIPT_URL = ROOT_TEST_DIR + "doc_frame_script.js";
+
+const STYLE_INSPECTOR_L10N
+      = new LocalizationHelper("devtools/shared/locales/styleinspector.properties");
+
+registerCleanupFunction(() => {
+  Services.prefs.clearUserPref("devtools.defaultColorUnit");
+});
+
+/**
+ * The rule-view tests rely on a frame-script to be injected in the content test
+ * page. So override the shared-head's addTab to load the frame script after the
+ * tab was added.
+ * FIXME: Refactor the rule-view tests to use the testActor instead of a frame
+ * script, so they can run on remote targets too.
+ */
+var _addTab = addTab;
+addTab = function (url) {
+  return _addTab(url).then(tab => {
+    info("Loading the helper frame script " + FRAME_SCRIPT_URL);
+    let browser = tab.linkedBrowser;
+    browser.messageManager.loadFrameScript(FRAME_SCRIPT_URL, false);
+    return tab;
+  });
+};
+
+/**
+ * Wait for a content -> chrome message on the message manager (the window
+ * messagemanager is used).
+ *
+ * @param {String} name
+ *        The message name
+ * @return {Promise} A promise that resolves to the response data when the
+ * message has been received
+ */
+function waitForContentMessage(name) {
+  info("Expecting message " + name + " from content");
+
+  let mm = gBrowser.selectedBrowser.messageManager;
+
+  let def = defer();
+  mm.addMessageListener(name, function onMessage(msg) {
+    mm.removeMessageListener(name, onMessage);
+    def.resolve(msg.data);
+  });
+  return def.promise;
+}
+
+/**
+ * Send an async message to the frame script (chrome -> content) and wait for a
+ * response message with the same name (content -> chrome).
+ *
+ * @param {String} name
+ *        The message name. Should be one of the messages defined
+ *        in doc_frame_script.js
+ * @param {Object} data
+ *        Optional data to send along
+ * @param {Object} objects
+ *        Optional CPOW objects to send along
+ * @param {Boolean} expectResponse
+ *        If set to false, don't wait for a response with the same name
+ *        from the content script. Defaults to true.
+ * @return {Promise} Resolves to the response data if a response is expected,
+ * immediately resolves otherwise
+ */
+function executeInContent(name, data = {}, objects = {},
+                          expectResponse = true) {
+  info("Sending message " + name + " to content");
+  let mm = gBrowser.selectedBrowser.messageManager;
+
+  mm.sendAsyncMessage(name, data, objects);
+  if (expectResponse) {
+    return waitForContentMessage(name);
+  }
+
+  return promise.resolve();
+}
+
+/**
+ * Send an async message to the frame script and get back the requested
+ * computed style property.
+ *
+ * @param {String} selector
+ *        The selector used to obtain the element.
+ * @param {String} pseudo
+ *        pseudo id to query, or null.
+ * @param {String} name
+ *        name of the property.
+ */
+function* getComputedStyleProperty(selector, pseudo, propName) {
+  return yield executeInContent("Test:GetComputedStylePropertyValue",
+                                {selector,
+                                pseudo,
+                                name: propName});
+}
+
+/**
+ * Get an element's inline style property value.
+ * @param {TestActor} testActor
+ * @param {String} selector
+ *        The selector used to obtain the element.
+ * @param {String} name
+ *        name of the property.
+ */
+function getStyle(testActor, selector, propName) {
+  return testActor.eval(`
+    content.document.querySelector("${selector}")
+                    .style.getPropertyValue("${propName}");
+  `);
+}
+
+/**
+ * Send an async message to the frame script and wait until the requested
+ * computed style property has the expected value.
+ *
+ * @param {String} selector
+ *        The selector used to obtain the element.
+ * @param {String} pseudo
+ *        pseudo id to query, or null.
+ * @param {String} prop
+ *        name of the property.
+ * @param {String} expected
+ *        expected value of property
+ * @param {String} name
+ *        the name used in test message
+ */
+function* waitForComputedStyleProperty(selector, pseudo, name, expected) {
+  return yield executeInContent("Test:WaitForComputedStylePropertyValue",
+                                {selector,
+                                pseudo,
+                                expected,
+                                name});
+}
+
+/**
+ * Given an inplace editable element, click to switch it to edit mode, wait for
+ * focus
+ *
+ * @return a promise that resolves to the inplace-editor element when ready
+ */
+var focusEditableField = Task.async(function* (ruleView, editable, xOffset = 1,
+    yOffset = 1, options = {}) {
+  let onFocus = once(editable.parentNode, "focus", true);
+  info("Clicking on editable field to turn to edit mode");
+  EventUtils.synthesizeMouse(editable, xOffset, yOffset, options,
+    editable.ownerDocument.defaultView);
+  yield onFocus;
+
+  info("Editable field gained focus, returning the input field now");
+  let onEdit = inplaceEditor(editable.ownerDocument.activeElement);
+
+  return onEdit;
+});
+
+/**
+ * When a tooltip is closed, this ends up "commiting" the value changed within
+ * the tooltip (e.g. the color in case of a colorpicker) which, in turn, ends up
+ * setting the value of the corresponding css property in the rule-view.
+ * Use this function to close the tooltip and make sure the test waits for the
+ * ruleview-changed event.
+ * @param {SwatchBasedEditorTooltip} editorTooltip
+ * @param {CSSRuleView} view
+ */
+function* hideTooltipAndWaitForRuleViewChanged(editorTooltip, view) {
+  let onModified = view.once("ruleview-changed");
+  let onHidden = editorTooltip.tooltip.once("hidden");
+  editorTooltip.hide();
+  yield onModified;
+  yield onHidden;
+}
+
+/**
+ * Polls a given generator function waiting for it to return true.
+ *
+ * @param {Function} validatorFn
+ *        A validator generator function that returns a boolean.
+ *        This is called every few milliseconds to check if the result is true.
+ *        When it is true, the promise resolves.
+ * @param {String} name
+ *        Optional name of the test. This is used to generate
+ *        the success and failure messages.
+ * @return a promise that resolves when the function returned true or rejects
+ * if the timeout is reached
+ */
+var waitForSuccess = Task.async(function* (validatorFn, desc = "untitled") {
+  let i = 0;
+  while (true) {
+    info("Checking: " + desc);
+    if (yield validatorFn()) {
+      ok(true, "Success: " + desc);
+      break;
+    }
+    i++;
+    if (i > 10) {
+      ok(false, "Failure: " + desc);
+      break;
+    }
+    yield new Promise(r => setTimeout(r, 200));
+  }
+});
+
+/**
+ * Get the DOMNode for a css rule in the rule-view that corresponds to the given
+ * selector
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {String} selectorText
+ *        The selector in the rule-view for which the rule
+ *        object is wanted
+ * @return {DOMNode}
+ */
+function getRuleViewRule(view, selectorText) {
+  let rule;
+  for (let r of view.styleDocument.querySelectorAll(".ruleview-rule")) {
+    let selector = r.querySelector(".ruleview-selectorcontainer, " +
+                                   ".ruleview-selector-matched");
+    if (selector && selector.textContent === selectorText) {
+      rule = r;
+      break;
+    }
+  }
+
+  return rule;
+}
+
+/**
+ * Get references to the name and value span nodes corresponding to a given
+ * selector and property name in the rule-view
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {String} selectorText
+ *        The selector in the rule-view to look for the property in
+ * @param {String} propertyName
+ *        The name of the property
+ * @return {Object} An object like {nameSpan: DOMNode, valueSpan: DOMNode}
+ */
+function getRuleViewProperty(view, selectorText, propertyName) {
+  let prop;
+
+  let rule = getRuleViewRule(view, selectorText);
+  if (rule) {
+    // Look for the propertyName in that rule element
+    for (let p of rule.querySelectorAll(".ruleview-property")) {
+      let nameSpan = p.querySelector(".ruleview-propertyname");
+      let valueSpan = p.querySelector(".ruleview-propertyvalue");
+
+      if (nameSpan.textContent === propertyName) {
+        prop = {nameSpan: nameSpan, valueSpan: valueSpan};
+        break;
+      }
+    }
+  }
+  return prop;
+}
+
+/**
+ * Get the text value of the property corresponding to a given selector and name
+ * in the rule-view
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {String} selectorText
+ *        The selector in the rule-view to look for the property in
+ * @param {String} propertyName
+ *        The name of the property
+ * @return {String} The property value
+ */
+function getRuleViewPropertyValue(view, selectorText, propertyName) {
+  return getRuleViewProperty(view, selectorText, propertyName)
+    .valueSpan.textContent;
+}
+
+/**
+ * Get a reference to the selector DOM element corresponding to a given selector
+ * in the rule-view
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {String} selectorText
+ *        The selector in the rule-view to look for
+ * @return {DOMNode} The selector DOM element
+ */
+function getRuleViewSelector(view, selectorText) {
+  let rule = getRuleViewRule(view, selectorText);
+  return rule.querySelector(".ruleview-selector, .ruleview-selector-matched");
+}
+
+/**
+ * Get a reference to the selectorhighlighter icon DOM element corresponding to
+ * a given selector in the rule-view
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {String} selectorText
+ *        The selector in the rule-view to look for
+ * @return {DOMNode} The selectorhighlighter icon DOM element
+ */
+function getRuleViewSelectorHighlighterIcon(view, selectorText) {
+  let rule = getRuleViewRule(view, selectorText);
+  return rule.querySelector(".ruleview-selectorhighlighter");
+}
+
+/**
+ * Simulate a color change in a given color picker tooltip, and optionally wait
+ * for a given element in the page to have its style changed as a result.
+ * Note that this function assumes that the colorpicker popup is already open
+ * and it won't close it after having selected the new color.
+ *
+ * @param {RuleView} ruleView
+ *        The related rule view instance
+ * @param {SwatchColorPickerTooltip} colorPicker
+ * @param {Array} newRgba
+ *        The new color to be set [r, g, b, a]
+ * @param {Object} expectedChange
+ *        Optional object that needs the following props:
+ *          - {String} selector The selector to the element in the page that
+ *            will have its style changed.
+ *          - {String} name The style name that will be changed
+ *          - {String} value The expected style value
+ * The style will be checked like so: getComputedStyle(element)[name] === value
+ */
+var simulateColorPickerChange = Task.async(function* (ruleView, colorPicker,
+    newRgba, expectedChange) {
+  let onComputedStyleChanged;
+  if (expectedChange) {
+    let {selector, name, value} = expectedChange;
+    onComputedStyleChanged = waitForComputedStyleProperty(selector, null, name, value);
+  }
+  let onRuleViewChanged = ruleView.once("ruleview-changed");
+  info("Getting the spectrum colorpicker object");
+  let spectrum = colorPicker.spectrum;
+  info("Setting the new color");
+  spectrum.rgb = newRgba;
+  info("Applying the change");
+  spectrum.updateUI();
+  spectrum.onChange();
+  info("Waiting for rule-view to update");
+  yield onRuleViewChanged;
+
+  if (expectedChange) {
+    info("Waiting for the style to be applied on the page");
+    yield onComputedStyleChanged;
+  }
+});
+
+/**
+ * Open the color picker popup for a given property in a given rule and
+ * simulate a color change. Optionally wait for a given element in the page to
+ * have its style changed as a result.
+ *
+ * @param {RuleView} view
+ *        The related rule view instance
+ * @param {Number} ruleIndex
+ *        Which rule to target in the rule view
+ * @param {Number} propIndex
+ *        Which property to target in the rule
+ * @param {Array} newRgba
+ *        The new color to be set [r, g, b, a]
+ * @param {Object} expectedChange
+ *        Optional object that needs the following props:
+ *          - {String} selector The selector to the element in the page that
+ *            will have its style changed.
+ *          - {String} name The style name that will be changed
+ *          - {String} value The expected style value
+ * The style will be checked like so: getComputedStyle(element)[name] === value
+ */
+var openColorPickerAndSelectColor = Task.async(function* (view, ruleIndex,
+    propIndex, newRgba, expectedChange) {
+  let ruleEditor = getRuleViewRuleEditor(view, ruleIndex);
+  let propEditor = ruleEditor.rule.textProps[propIndex].editor;
+  let swatch = propEditor.valueSpan.querySelector(".ruleview-colorswatch");
+  let cPicker = view.tooltips.colorPicker;
+
+  info("Opening the colorpicker by clicking the color swatch");
+  let onColorPickerReady = cPicker.once("ready");
+  swatch.click();
+  yield onColorPickerReady;
+
+  yield simulateColorPickerChange(view, cPicker, newRgba, expectedChange);
+
+  return {propEditor, swatch, cPicker};
+});
+
+/**
+ * Open the cubicbezier popup for a given property in a given rule and
+ * simulate a curve change. Optionally wait for a given element in the page to
+ * have its style changed as a result.
+ *
+ * @param {RuleView} view
+ *        The related rule view instance
+ * @param {Number} ruleIndex
+ *        Which rule to target in the rule view
+ * @param {Number} propIndex
+ *        Which property to target in the rule
+ * @param {Array} coords
+ *        The new coordinates to be used, e.g. [0.1, 2, 0.9, -1]
+ * @param {Object} expectedChange
+ *        Optional object that needs the following props:
+ *          - {String} selector The selector to the element in the page that
+ *            will have its style changed.
+ *          - {String} name The style name that will be changed
+ *          - {String} value The expected style value
+ * The style will be checked like so: getComputedStyle(element)[name] === value
+ */
+var openCubicBezierAndChangeCoords = Task.async(function* (view, ruleIndex,
+    propIndex, coords, expectedChange) {
+  let ruleEditor = getRuleViewRuleEditor(view, ruleIndex);
+  let propEditor = ruleEditor.rule.textProps[propIndex].editor;
+  let swatch = propEditor.valueSpan.querySelector(".ruleview-bezierswatch");
+  let bezierTooltip = view.tooltips.cubicBezier;
+
+  info("Opening the cubicBezier by clicking the swatch");
+  let onBezierWidgetReady = bezierTooltip.once("ready");
+  swatch.click();
+  yield onBezierWidgetReady;
+
+  let widget = yield bezierTooltip.widget;
+
+  info("Simulating a change of curve in the widget");
+  let onRuleViewChanged = view.once("ruleview-changed");
+  widget.coordinates = coords;
+  yield onRuleViewChanged;
+
+  if (expectedChange) {
+    info("Waiting for the style to be applied on the page");
+    let {selector, name, value} = expectedChange;
+    yield waitForComputedStyleProperty(selector, null, name, value);
+  }
+
+  return {propEditor, swatch, bezierTooltip};
+});
+
+/**
+ * Get a rule-link from the rule-view given its index
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {Number} index
+ *        The index of the link to get
+ * @return {DOMNode} The link if any at this index
+ */
+function getRuleViewLinkByIndex(view, index) {
+  let links = view.styleDocument.querySelectorAll(".ruleview-rule-source");
+  return links[index];
+}
+
+/**
+ * Get rule-link text from the rule-view given its index
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {Number} index
+ *        The index of the link to get
+ * @return {String} The string at this index
+ */
+function getRuleViewLinkTextByIndex(view, index) {
+  let link = getRuleViewLinkByIndex(view, index);
+  return link.querySelector(".ruleview-rule-source-label").textContent;
+}
+
+/**
+ * Simulate adding a new property in an existing rule in the rule-view.
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {Number} ruleIndex
+ *        The index of the rule to use. Note that if ruleIndex is 0, you might
+ *        want to also listen to markupmutation events in your test since
+ *        that's going to change the style attribute of the selected node.
+ * @param {String} name
+ *        The name for the new property
+ * @param {String} value
+ *        The value for the new property
+ * @param {String} commitValueWith
+ *        Which key should be used to commit the new value. VK_RETURN is used by
+ *        default, but tests might want to use another key to test cancelling
+ *        for exemple.
+ * @param {Boolean} blurNewProperty
+ *        After the new value has been added, a new property would have been
+ *        focused. This parameter is true by default, and that causes the new
+ *        property to be blurred. Set to false if you don't want this.
+ * @return {TextProperty} The instance of the TextProperty that was added
+ */
+var addProperty = Task.async(function* (view, ruleIndex, name, value,
+                                        commitValueWith = "VK_RETURN",
+                                        blurNewProperty = true) {
+  info("Adding new property " + name + ":" + value + " to rule " + ruleIndex);
+
+  let ruleEditor = getRuleViewRuleEditor(view, ruleIndex);
+  let editor = yield focusNewRuleViewProperty(ruleEditor);
+  let numOfProps = ruleEditor.rule.textProps.length;
+
+  info("Adding name " + name);
+  editor.input.value = name;
+  let onNameAdded = view.once("ruleview-changed");
+  EventUtils.synthesizeKey("VK_RETURN", {}, view.styleWindow);
+  yield onNameAdded;
+
+  // Focus has moved to the value inplace-editor automatically.
+  editor = inplaceEditor(view.styleDocument.activeElement);
+  let textProps = ruleEditor.rule.textProps;
+  let textProp = textProps[textProps.length - 1];
+
+  is(ruleEditor.rule.textProps.length, numOfProps + 1,
+     "A new test property was added");
+  is(editor, inplaceEditor(textProp.editor.valueSpan),
+     "The inplace editor appeared for the value");
+
+  info("Adding value " + value);
+  // Setting the input value schedules a preview to be shown in 10ms which
+  // triggers a ruleview-changed event (see bug 1209295).
+  let onPreview = view.once("ruleview-changed");
+  editor.input.value = value;
+  view.throttle.flush();
+  yield onPreview;
+
+  let onValueAdded = view.once("ruleview-changed");
+  EventUtils.synthesizeKey(commitValueWith, {}, view.styleWindow);
+  yield onValueAdded;
+
+  if (blurNewProperty) {
+    view.styleDocument.activeElement.blur();
+  }
+
+  return textProp;
+});
+
+/**
+ * Simulate changing the value of a property in a rule in the rule-view.
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {TextProperty} textProp
+ *        The instance of the TextProperty to be changed
+ * @param {String} value
+ *        The new value to be used. If null is passed, then the value will be
+ *        deleted
+ * @param {Boolean} blurNewProperty
+ *        After the value has been changed, a new property would have been
+ *        focused. This parameter is true by default, and that causes the new
+ *        property to be blurred. Set to false if you don't want this.
+ */
+var setProperty = Task.async(function* (view, textProp, value,
+                                        blurNewProperty = true) {
+  yield focusEditableField(view, textProp.editor.valueSpan);
+
+  let onPreview = view.once("ruleview-changed");
+  if (value === null) {
+    EventUtils.synthesizeKey("VK_DELETE", {}, view.styleWindow);
+  } else {
+    EventUtils.sendString(value, view.styleWindow);
+  }
+  view.throttle.flush();
+  yield onPreview;
+
+  let onValueDone = view.once("ruleview-changed");
+  EventUtils.synthesizeKey("VK_RETURN", {}, view.styleWindow);
+  yield onValueDone;
+
+  if (blurNewProperty) {
+    view.styleDocument.activeElement.blur();
+  }
+});
+
+/**
+ * Simulate removing a property from an existing rule in the rule-view.
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {TextProperty} textProp
+ *        The instance of the TextProperty to be removed
+ * @param {Boolean} blurNewProperty
+ *        After the property has been removed, a new property would have been
+ *        focused. This parameter is true by default, and that causes the new
+ *        property to be blurred. Set to false if you don't want this.
+ */
+var removeProperty = Task.async(function* (view, textProp,
+                                           blurNewProperty = true) {
+  yield focusEditableField(view, textProp.editor.nameSpan);
+
+  let onModifications = view.once("ruleview-changed");
+  info("Deleting the property name now");
+  EventUtils.synthesizeKey("VK_DELETE", {}, view.styleWindow);
+  EventUtils.synthesizeKey("VK_RETURN", {}, view.styleWindow);
+  yield onModifications;
+
+  if (blurNewProperty) {
+    view.styleDocument.activeElement.blur();
+  }
+});
+
+/**
+ * Simulate clicking the enable/disable checkbox next to a property in a rule.
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {TextProperty} textProp
+ *        The instance of the TextProperty to be enabled/disabled
+ */
+var togglePropStatus = Task.async(function* (view, textProp) {
+  let onRuleViewRefreshed = view.once("ruleview-changed");
+  textProp.editor.enable.click();
+  yield onRuleViewRefreshed;
+});
+
+/**
+ * Click on a rule-view's close brace to focus a new property name editor
+ *
+ * @param {RuleEditor} ruleEditor
+ *        An instance of RuleEditor that will receive the new property
+ * @return a promise that resolves to the newly created editor when ready and
+ * focused
+ */
+var focusNewRuleViewProperty = Task.async(function* (ruleEditor) {
+  info("Clicking on a close ruleEditor brace to start editing a new property");
+
+  // Use bottom alignment to avoid scrolling out of the parent element area.
+  ruleEditor.closeBrace.scrollIntoView(false);
+  let editor = yield focusEditableField(ruleEditor.ruleView,
+    ruleEditor.closeBrace);
+
+  is(inplaceEditor(ruleEditor.newPropSpan), editor,
+    "Focused editor is the new property editor.");
+
+  return editor;
+});
+
+/**
+ * Create a new property name in the rule-view, focusing a new property editor
+ * by clicking on the close brace, and then entering the given text.
+ * Keep in mind that the rule-view knows how to handle strings with multiple
+ * properties, so the input text may be like: "p1:v1;p2:v2;p3:v3".
+ *
+ * @param {RuleEditor} ruleEditor
+ *        The instance of RuleEditor that will receive the new property(ies)
+ * @param {String} inputValue
+ *        The text to be entered in the new property name field
+ * @return a promise that resolves when the new property name has been entered
+ * and once the value field is focused
+ */
+var createNewRuleViewProperty = Task.async(function* (ruleEditor, inputValue) {
+  info("Creating a new property editor");
+  let editor = yield focusNewRuleViewProperty(ruleEditor);
+
+  info("Entering the value " + inputValue);
+  editor.input.value = inputValue;
+
+  info("Submitting the new value and waiting for value field focus");
+  let onFocus = once(ruleEditor.element, "focus", true);
+  EventUtils.synthesizeKey("VK_RETURN", {},
+    ruleEditor.element.ownerDocument.defaultView);
+  yield onFocus;
+});
+
+/**
+ * Set the search value for the rule-view filter styles search box.
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {String} searchValue
+ *        The filter search value
+ * @return a promise that resolves when the rule-view is filtered for the
+ * search term
+ */
+var setSearchFilter = Task.async(function* (view, searchValue) {
+  info("Setting filter text to \"" + searchValue + "\"");
+  let win = view.styleWindow;
+  let searchField = view.searchField;
+  searchField.focus();
+  synthesizeKeys(searchValue, win);
+  yield view.inspector.once("ruleview-filtered");
+});
+
+/**
+ * Reload the current page and wait for the inspector to be initialized after
+ * the navigation
+ *
+ * @param {InspectorPanel} inspector
+ *        The instance of InspectorPanel currently loaded in the toolbox
+ * @param {TestActor} testActor
+ *        The current instance of the TestActor
+ */
+function* reloadPage(inspector, testActor) {
+  let onNewRoot = inspector.once("new-root");
+  yield testActor.reload();
+  yield onNewRoot;
+  yield inspector.markup._waitForChildren();
+}
+
+/**
+ * Create a new rule by clicking on the "add rule" button.
+ * This will leave the selector inplace-editor active.
+ *
+ * @param {InspectorPanel} inspector
+ *        The instance of InspectorPanel currently loaded in the toolbox
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @return a promise that resolves after the rule has been added
+ */
+function* addNewRule(inspector, view) {
+  info("Adding the new rule using the button");
+  view.addRuleButton.click();
+
+  info("Waiting for rule view to change");
+  yield view.once("ruleview-changed");
+}
+
+/**
+ * Create a new rule by clicking on the "add rule" button, dismiss the editor field and
+ * verify that the selector is correct.
+ *
+ * @param {InspectorPanel} inspector
+ *        The instance of InspectorPanel currently loaded in the toolbox
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {String} expectedSelector
+ *        The value we expect the selector to have
+ * @param {Number} expectedIndex
+ *        The index we expect the rule to have in the rule-view
+ * @return a promise that resolves after the rule has been added
+ */
+function* addNewRuleAndDismissEditor(inspector, view, expectedSelector, expectedIndex) {
+  yield addNewRule(inspector, view);
+
+  info("Getting the new rule at index " + expectedIndex);
+  let ruleEditor = getRuleViewRuleEditor(view, expectedIndex);
+  let editor = ruleEditor.selectorText.ownerDocument.activeElement;
+  is(editor.value, expectedSelector,
+     "The editor for the new selector has the correct value: " + expectedSelector);
+
+  info("Pressing escape to leave the editor");
+  EventUtils.synthesizeKey("VK_ESCAPE", {});
+
+  is(ruleEditor.selectorText.textContent, expectedSelector,
+     "The new selector has the correct text: " + expectedSelector);
+}
+
+/**
+ * Simulate a sequence of non-character keys (return, escape, tab) and wait for
+ * a given element to receive the focus.
+ *
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @param {DOMNode} element
+ *        The element that should be focused
+ * @param {Array} keys
+ *        Array of non-character keys, the part that comes after "DOM_VK_" eg.
+ *        "RETURN", "ESCAPE"
+ * @return a promise that resolves after the element received the focus
+ */
+function* sendKeysAndWaitForFocus(view, element, keys) {
+  let onFocus = once(element, "focus", true);
+  for (let key of keys) {
+    EventUtils.sendKey(key, view.styleWindow);
+  }
+  yield onFocus;
+}
+
+/**
+ * Open the style editor context menu and return all of it's items in a flat array
+ * @param {CssRuleView} view
+ *        The instance of the rule-view panel
+ * @return An array of MenuItems
+ */
+function openStyleContextMenuAndGetAllItems(view, target) {
+  let menu = view._contextmenu._openMenu({target: target});
+
+  // Flatten all menu items into a single array to make searching through it easier
+  let allItems = [].concat.apply([], menu.items.map(function addItem(item) {
+    if (item.submenu) {
+      return addItem(item.submenu.items);
+    }
+    return item;
+  }));
+
+  return allItems;
+}
+
+/**
+ * Wait for a markupmutation event on the inspector that is for a style modification.
+ * @param {InspectorPanel} inspector
+ * @return {Promise}
+ */
+function waitForStyleModification(inspector) {
+  return new Promise(function (resolve) {
+    function checkForStyleModification(name, mutations) {
+      for (let mutation of mutations) {
+        if (mutation.type === "attributes" && mutation.attributeName === "style") {
+          inspector.off("markupmutation", checkForStyleModification);
+          resolve();
+          return;
+        }
+      }
+    }
+    inspector.on("markupmutation", checkForStyleModification);
+  });
+}
+
+/**
+ * Click on the selector icon
+ * @param {DOMNode} icon
+ * @param {CSSRuleView} view
+ */
+function* clickSelectorIcon(icon, view) {
+  let onToggled = view.once("ruleview-selectorhighlighter-toggled");
+  EventUtils.synthesizeMouseAtCenter(icon, {}, view.styleWindow);
+  yield onToggled;
+}
+
+/**
+ * Make sure window is properly focused before sending a key event.
+ * @param {Window} win
+ * @param {Event} key
+ */
+function focusAndSendKey(win, key) {
+  win.document.documentElement.focus();
+  EventUtils.sendKey(key, win);
+}