1 files changed, 96 insertions, 0 deletions
diff --git a/accessible/tests/browser/e10s/browser_caching_relations.js b/accessible/tests/browser/e10s/browser_caching_relations.js
new file mode 100644
index 0000000000..38d3a0c63b
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_caching_relations.js
@@ -0,0 +1,96 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/relations.js */
+loadScripts({ name: "relations.js", dir: MOCHITESTS_DIR });
+
+/**
+ * A test specification that has the following format:
+ * [
+ *   attr                 relevant aria attribute
+ *   hostRelation         corresponding host relation type
+ *   dependantRelation    corresponding dependant relation type
+ * ]
+ */
+const attrRelationsSpec = [
+  ["aria-labelledby", RELATION_LABELLED_BY, RELATION_LABEL_FOR],
+  ["aria-describedby", RELATION_DESCRIBED_BY, RELATION_DESCRIPTION_FOR],
+  ["aria-controls", RELATION_CONTROLLER_FOR, RELATION_CONTROLLED_BY],
+  ["aria-flowto", RELATION_FLOWS_TO, RELATION_FLOWS_FROM],
+];
+
+async function testRelated(
+  browser,
+  accDoc,
+  attr,
+  hostRelation,
+  dependantRelation
+) {
+  let host = findAccessibleChildByID(accDoc, "host");
+  let dependant1 = findAccessibleChildByID(accDoc, "dependant1");
+  let dependant2 = findAccessibleChildByID(accDoc, "dependant2");
+
+  /**
+   * Test data has the format of:
+   * {
+   *   desc      {String}   description for better logging
+   *   attrs     {?Array}   an optional list of attributes to update
+   *   expected  {Array}    expected relation values for dependant1, dependant2
+   *                        and host respectively.
+   * }
+   */
+  const tests = [
+    {
+      desc: "No attribute",
+      expected: [null, null, null],
+    },
+    {
+      desc: "Set attribute",
+      attrs: [{ key: attr, value: "dependant1" }],
+      expected: [host, null, dependant1],
+    },
+    {
+      desc: "Change attribute",
+      attrs: [{ key: attr, value: "dependant2" }],
+      expected: [null, host, dependant2],
+    },
+    {
+      desc: "Remove attribute",
+      attrs: [{ key: attr }],
+      expected: [null, null, null],
+    },
+  ];
+
+  for (let { desc, attrs, expected } of tests) {
+    info(desc);
+
+    if (attrs) {
+      for (let { key, value } of attrs) {
+        await invokeSetAttribute(browser, "host", key, value);
+      }
+    }
+
+    testRelation(dependant1, dependantRelation, expected[0]);
+    testRelation(dependant2, dependantRelation, expected[1]);
+    testRelation(host, hostRelation, expected[2]);
+  }
+}
+
+/**
+ * Test caching of relations between accessible objects.
+ */
+addAccessibleTask(
+  `
+  <div id="dependant1">label</div>
+  <div id="dependant2">label2</div>
+  <div role="checkbox" id="host"></div>`,
+  async function(browser, accDoc) {
+    for (let spec of attrRelationsSpec) {
+      await testRelated(browser, accDoc, ...spec);
+    }
+  },
+  { iframe: true, remoteIframe: true }
+);