1 files changed, 128 insertions, 0 deletions
diff --git a/accessible/tests/browser/tree/browser_general.js b/accessible/tests/browser/tree/browser_general.js
new file mode 100644
index 0000000000..0d16271a36
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+++ b/accessible/tests/browser/tree/browser_general.js
@@ -0,0 +1,128 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+/**
+ * Verify adding `overflow:hidden;` styling to a div causes it to
+ * get an accessible.
+ */
+addAccessibleTask(`<p>hello world</p>`, async function (browser, docAcc) {
+  const originalTree = { DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }] };
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding div element");
+  await contentSpawnMutation(
+    browser,
+    { unexpected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      const d = content.document.createElement("div");
+      content.document.body.appendChild(d);
+    }
+  );
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding overflow:hidden styling to div");
+  await contentSpawnMutation(
+    browser,
+    { expected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      content.document.body.lastElementChild.setAttribute(
+        "style",
+        "overflow:hidden;"
+      );
+    }
+  );
+
+  testAccessibleTree(docAcc, {
+    DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }, { TEXT_CONTAINER: [] }],
+  });
+});
+
+/**
+ * Verify adding `overflow:scroll;` styling to a div causes
+ * it to  get an accessible.
+ */
+addAccessibleTask(`<p>hello world</p>`, async function (browser, docAcc) {
+  const originalTree = { DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }] };
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding div element");
+  await contentSpawnMutation(
+    browser,
+    { unexpected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      const d = content.document.createElement("div");
+      content.document.body.appendChild(d);
+    }
+  );
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding overflow:scroll styling to div");
+  await contentSpawnMutation(
+    browser,
+    { expected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      content.document.body.lastElementChild.setAttribute(
+        "style",
+        "overflow:scroll;"
+      );
+    }
+  );
+
+  testAccessibleTree(docAcc, {
+    DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }, { TEXT_CONTAINER: [] }],
+  });
+});
+
+/**
+ * Verify adding `overflow:auto;` styling to a div causes
+ * it to get an accessible, but `overflow:visible` does not.
+ */
+addAccessibleTask(`<p>hello world</p>`, async function (browser, docAcc) {
+  const originalTree = { DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }] };
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding div element");
+  await contentSpawnMutation(
+    browser,
+    { unexpected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      const d = content.document.createElement("div");
+      content.document.body.appendChild(d);
+    }
+  );
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding overflow:visible styling to div");
+  await contentSpawnMutation(
+    browser,
+    { unexpected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      content.document.body.lastElementChild.setAttribute(
+        "style",
+        "overflow:visible;"
+      );
+    }
+  );
+
+  testAccessibleTree(docAcc, originalTree);
+  info("Adding overflow:auto styling to div");
+  await contentSpawnMutation(
+    browser,
+    { expected: [[EVENT_REORDER, docAcc]] },
+    function () {
+      content.document.body.lastElementChild.setAttribute(
+        "style",
+        "overflow:auto;"
+      );
+    }
+  );
+
+  testAccessibleTree(docAcc, {
+    DOCUMENT: [{ PARAGRAPH: [{ TEXT_LEAF: [] }] }, { TEXT_CONTAINER: [] }],
+  });
+});