diff -r 000000000000 -r 6474c204b198 browser/devtools/styleinspector/test/browser_computedview_select-and-copy-styles.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/styleinspector/test/browser_computedview_select-and-copy-styles.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,118 @@
+/* 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/ */
+
+"use strict";
+
+// Tests that properties can be selected and copied from the computed view
+
+XPCOMUtils.defineLazyGetter(this, "osString", function() {
+  return Cc["@mozilla.org/xre/app-info;1"].getService(Ci.nsIXULRuntime).OS;
+});
+
+let test = asyncTest(function*() {
+  yield addTab("data:text/html,computed view copy test");
+
+  info("Creating the test document");
+  content.document.body.innerHTML = '<style type="text/css"> ' +
+    'span { font-variant: small-caps; color: #000000; } ' +
+    '.nomatches {color: #ff0000;}</style> <div id="first" style="margin: 10em; ' +
+    'font-size: 14pt; font-family: helvetica, sans-serif; color: #AAA">\n' +
+    '<h1>Some header text</h1>\n' +
+    '<p id="salutation" style="font-size: 12pt">hi.</p>\n' +
+    '<p id="body" style="font-size: 12pt">I am a test-case. This text exists ' +
+    'solely to provide some things to <span style="color: yellow">' +
+    'highlight</span> and <span style="font-weight: bold">count</span> ' +
+    'style list-items in the box at right. If you are reading this, ' +
+    'you should go do something else instead. Maybe read a book. Or better ' +
+    'yet, write some test-cases for another bit of code. ' +
+    '<span style="font-style: italic">some text</span></p>\n' +
+    '<p id="closing">more text</p>\n' +
+    '<p>even more text</p>' +
+    '</div>';
+  content.document.title = "Computed view context menu test";
+
+  info("Opening the computed view");
+  let {toolbox, inspector, view} = yield openComputedView();
+
+  info("Selecting the test node");
+  yield selectNode("span", inspector);
+
+  yield checkCopySelection(view);
+  yield checkSelectAll(view);
+});
+
+function checkCopySelection(view) {
+  info("Testing selection copy");
+
+  let contentDocument = view.styleDocument;
+  let props = contentDocument.querySelectorAll(".property-view");
+  ok(props, "captain, we have the property-view nodes");
+
+  let range = contentDocument.createRange();
+  range.setStart(props[1], 0);
+  range.setEnd(props[3], 3);
+  contentDocument.defaultView.getSelection().addRange(range);
+
+  info("Checking that cssHtmlTree.siBoundCopy() returns the correct clipboard value");
+
+  let expectedPattern = "font-family: helvetica,sans-serif;[\\r\\n]+" +
+                        "font-size: 16px;[\\r\\n]+" +
+                        "font-variant: small-caps;[\\r\\n]*";
+
+  return waitForClipboard(() => {
+    fireCopyEvent(props[0]);
+  }, () => {
+    return checkClipboardData(expectedPattern);
+  }).then(() => {}, () => {
+    failedClipboard(expectedPattern);
+  });
+}
+
+function checkSelectAll(view) {
+  info("Testing select-all copy");
+
+  let contentDoc = view.styleDocument;
+  let prop = contentDoc.querySelector(".property-view");
+
+  info("Checking that _SelectAll() then copy returns the correct clipboard value");
+  view._onSelectAll();
+  let expectedPattern = "color: #FF0;[\\r\\n]+" +
+                        "font-family: helvetica,sans-serif;[\\r\\n]+" +
+                        "font-size: 16px;[\\r\\n]+" +
+                        "font-variant: small-caps;[\\r\\n]*";
+
+  return waitForClipboard(() => {
+    fireCopyEvent(prop);
+  }, () => {
+    return checkClipboardData(expectedPattern);
+  }).then(() => {}, () => {
+    failedClipboard(expectedPattern);
+  });
+}
+
+function checkClipboardData(expectedPattern) {
+  let actual = SpecialPowers.getClipboardData("text/unicode");
+  let expectedRegExp = new RegExp(expectedPattern, "g");
+  return expectedRegExp.test(actual);
+}
+
+function failedClipboard(expectedPattern) {
+  // Format expected text for comparison
+  let terminator = osString == "WINNT" ? "\r\n" : "\n";
+  expectedPattern = expectedPattern.replace(/\[\\r\\n\][+*]/g, terminator);
+  expectedPattern = expectedPattern.replace(/\\\(/g, "(");
+  expectedPattern = expectedPattern.replace(/\\\)/g, ")");
+
+  let actual = SpecialPowers.getClipboardData("text/unicode");
+
+  // Trim the right hand side of our strings. This is because expectedPattern
+  // accounts for windows sometimes adding a newline to our copied data.
+  expectedPattern = expectedPattern.trimRight();
+  actual = actual.trimRight();
+
+  dump("TEST-UNEXPECTED-FAIL | Clipboard text does not match expected ... " +
+    "results (escaped for accurate comparison):\n");
+  info("Actual: " + escape(actual));
+  info("Expected: " + escape(expectedPattern));
+}