1 files changed, 64 insertions, 0 deletions
diff --git a/mobile/android/components/extensions/test/mochitest/test_ext_tabs_lastAccessed.html b/mobile/android/components/extensions/test/mochitest/test_ext_tabs_lastAccessed.html
new file mode 100644
index 0000000000..5bb44ab645
--- /dev/null
+++ b/mobile/android/components/extensions/test/mochitest/test_ext_tabs_lastAccessed.html
@@ -0,0 +1,64 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Tabs lastAccessed Test</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
+  <script type="text/javascript" src="head.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+
+<script type="text/javascript">
+"use strict";
+
+add_task(async function testLastAccessed() {
+  const past = Date.now();
+
+  window.open("https://example.com/?1");
+  window.open("https://example.com/?2");
+
+  const extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      permissions: ["tabs"],
+    },
+    async background() {
+      browser.test.onMessage.addListener(async function(msg, past) {
+        if (msg !== "past") {
+          return;
+        }
+
+        const [tab1] = await browser.tabs.query({url: "https://example.com/?1"});
+        const [tab2] = await browser.tabs.query({url: "https://example.com/?2"});
+
+        browser.test.assertTrue(tab1 && tab2, "Expected tabs were found");
+
+        const now = Date.now();
+
+        browser.test.assertTrue(typeof tab1.lastAccessed == "number",
+                                "tab1 lastAccessed should be a number");
+
+        browser.test.assertTrue(typeof tab2.lastAccessed == "number",
+                                "tab2 lastAccessed should be a number");
+
+        browser.test.assertTrue(past <= tab1.lastAccessed &&
+                                tab1.lastAccessed <= tab2.lastAccessed &&
+                                tab2.lastAccessed <= now,
+                                "lastAccessed timestamps are recent and in the right order");
+
+        await browser.tabs.remove([tab1.id, tab2.id]);
+
+        browser.test.notifyPass("tabs.lastAccessed");
+      });
+    },
+  });
+
+  await extension.startup();
+  await extension.sendMessage("past", past);
+  await extension.awaitFinish("tabs.lastAccessed");
+  await extension.unload();
+});
+</script>
+
+</body>