diff -r 000000000000 -r 6474c204b198 accessible/tests/mochitest/jsat/output.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/accessible/tests/mochitest/jsat/output.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,97 @@
+const Cu = Components.utils;
+const PREF_UTTERANCE_ORDER = "accessibility.accessfu.utterance";
+
+Cu.import('resource://gre/modules/accessibility/Utils.jsm');
+Cu.import("resource://gre/modules/accessibility/OutputGenerator.jsm", this);
+
+/**
+ * Test context output generation.
+ *
+ * @param expected {Array} expected output.
+ * @param aAccOrElmOrID    identifier to get an accessible to test.
+ * @param aOldAccOrElmOrID optional identifier to get an accessible relative to
+ *                         the |aAccOrElmOrID|.
+ * @param aGenerator       the output generator to use when generating accessible
+ *                         output
+ *
+ * Note: if |aOldAccOrElmOrID| is not provided, the |aAccOrElmOrID| must be
+ * scoped to the "root" element in markup.
+ */
+function testContextOutput(expected, aAccOrElmOrID, aOldAccOrElmOrID, aGenerator) {
+  var accessible = getAccessible(aAccOrElmOrID);
+  var oldAccessible = aOldAccOrElmOrID !== null ?
+	getAccessible(aOldAccOrElmOrID || 'root') : null;
+  var context = new PivotContext(accessible, oldAccessible);
+  var output = aGenerator.genForContext(context).output;
+
+  // Create a version of the output that has null members where we have
+  // null members in the expected output. Those are indexes that are not testable
+  // because of the changing nature of the test (different window names), or strings
+  // that are inaccessible to us, like the title of parent documents.
+  var masked_output = [];
+  for (var i=0; i < output.length; i++) {
+    if (expected[i] === null) {
+      masked_output.push(null);
+    } else {
+      masked_output[i] = output[i];
+    }
+  }
+
+  isDeeply(masked_output, expected,
+           "Context output is correct for " + aAccOrElmOrID +
+           " (output: " + output.join(", ") + ") ==" +
+           " (expected: " + expected.join(", ") + ")");
+}
+
+/**
+ * Test object output generated array that includes names.
+ * Note: test ignores outputs without the name.
+ *
+ * @param aAccOrElmOrID identifier to get an accessible to test.
+ * @param aGenerator    the output generator to use when generating accessible
+ *                      output
+ */
+function testObjectOutput(aAccOrElmOrID, aGenerator) {
+  var accessible = getAccessible(aAccOrElmOrID);
+  var context = new PivotContext(accessible);
+  var output = aGenerator.genForObject(accessible, context);
+  var outputOrder;
+  try {
+    outputOrder = SpecialPowers.getIntPref(PREF_UTTERANCE_ORDER);
+  } catch (ex) {
+    // PREF_UTTERANCE_ORDER not set.
+    outputOrder = 0;
+  }
+  var expectedNameIndex = outputOrder === 0 ? output.length - 1 : 0;
+  var nameIndex = output.indexOf(accessible.name);
+
+  if (nameIndex > -1) {
+    ok(output.indexOf(accessible.name) === expectedNameIndex,
+      "Object output is correct for " + aAccOrElmOrID);
+  }
+}
+
+/**
+ * Test object and context output for an accessible.
+ *
+ * @param expected {Array} expected output.
+ * @param aAccOrElmOrID    identifier to get an accessible to test.
+ * @param aOldAccOrElmOrID optional identifier to get an accessible relative to
+ *                         the |aAccOrElmOrID|.
+ * @param aOutputKind      the type of output
+ */
+function testOutput(expected, aAccOrElmOrID, aOldAccOrElmOrID, aOutputKind) {
+  var generator;
+  if (aOutputKind === 1) {
+    generator = UtteranceGenerator;
+  } else {
+    generator = BrailleGenerator;
+  }
+  testContextOutput(expected, aAccOrElmOrID, aOldAccOrElmOrID, generator);
+  // Just need to test object output for individual
+  // accOrElmOrID.
+  if (aOldAccOrElmOrID) {
+    return;
+  }
+  testObjectOutput(aAccOrElmOrID, generator);
+}