1 files changed, 87 insertions, 0 deletions
diff --git a/toolkit/components/reader/test/browser_readerMode_remoteType.js b/toolkit/components/reader/test/browser_readerMode_remoteType.js
new file mode 100644
index 0000000000..690cb74338
--- /dev/null
+++ b/toolkit/components/reader/test/browser_readerMode_remoteType.js
@@ -0,0 +1,87 @@
+/* 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";
+
+const TEST_PATH = getRootDirectory(gTestPath).replace(
+  "chrome://mochitests/content",
+  "http://example.com"
+);
+
+const CROSS_SITE_TEST_PATH = getRootDirectory(gTestPath).replace(
+  "chrome://mochitests/content",
+  "http://example.org"
+);
+
+/**
+ * Test that switching an article into readermode doesn't change its' remoteType.
+ * Test that the reader mode correctly calculates and displays the
+ * estimated reading time for a short article
+ */
+add_task(async function () {
+  info("opening readermode normally to ensure process doesn't change");
+  let articleRemoteType;
+  let aboutReaderURL;
+  await BrowserTestUtils.withNewTab(
+    TEST_PATH + "readerModeArticleShort.html",
+    async function (browser) {
+      articleRemoteType = browser.remoteType;
+
+      // Click on the readermode button to switch into reader mode, and get the
+      // URL for that reader mode.
+      let pageShownPromise = BrowserTestUtils.waitForContentEvent(
+        browser,
+        "AboutReaderContentReady"
+      );
+      let readerButton = document.getElementById("reader-mode-button");
+      readerButton.click();
+      await pageShownPromise;
+
+      aboutReaderURL = browser.documentURI.spec;
+      ok(
+        aboutReaderURL.startsWith("about:reader"),
+        "about:reader should have been opened"
+      );
+      is(
+        browser.remoteType,
+        articleRemoteType,
+        "remote type should not have changed"
+      );
+    }
+  );
+
+  info(
+    "opening new tab directly with about reader URL into correct remote type"
+  );
+  await BrowserTestUtils.withNewTab(aboutReaderURL, async function (browser) {
+    is(
+      browser.remoteType,
+      articleRemoteType,
+      "Should have performed about:reader load in the correct remote type"
+    );
+  });
+
+  info("navigating process into correct remote type");
+  await BrowserTestUtils.withNewTab(
+    CROSS_SITE_TEST_PATH + "readerModeArticleShort.html",
+    async function (browser) {
+      if (SpecialPowers.useRemoteSubframes) {
+        isnot(
+          browser.remoteType,
+          articleRemoteType,
+          "Cross-site article should have different remote type with fission"
+        );
+      }
+
+      BrowserTestUtils.loadURIString(browser, aboutReaderURL);
+      await BrowserTestUtils.browserLoaded(browser);
+
+      is(
+        browser.remoteType,
+        articleRemoteType,
+        "Should have switched into the correct remote type"
+      );
+    }
+  );
+});