1 files changed, 56 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_bug724239.js b/browser/base/content/test/general/browser_bug724239.js
new file mode 100644
index 0000000000..78290e21f5
--- /dev/null
+++ b/browser/base/content/test/general/browser_bug724239.js
@@ -0,0 +1,56 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const { TabStateFlusher } = ChromeUtils.importESModule(
+  "resource:///modules/sessionstore/TabStateFlusher.sys.mjs"
+);
+
+add_task(async function test_blank() {
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: "about:blank" },
+    async function (browser) {
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      BrowserTestUtils.loadURIString(browser, "http://example.com");
+      await BrowserTestUtils.browserLoaded(browser);
+      ok(!gBrowser.canGoBack, "about:blank wasn't added to session history");
+    }
+  );
+});
+
+add_task(async function test_newtab() {
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: "about:blank" },
+    async function (browser) {
+      // Can't load it directly because that'll use a preloaded tab if present.
+      let stopped = BrowserTestUtils.browserStopped(browser, "about:newtab");
+      BrowserTestUtils.loadURIString(browser, "about:newtab");
+      await stopped;
+
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      stopped = BrowserTestUtils.browserStopped(browser, "http://example.com/");
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      BrowserTestUtils.loadURIString(browser, "http://example.com/");
+      await stopped;
+
+      // This makes sure the parent process has the most up-to-date notion
+      // of the tab's session history.
+      await TabStateFlusher.flush(browser);
+
+      let tab = gBrowser.getTabForBrowser(browser);
+      let tabState = JSON.parse(SessionStore.getTabState(tab));
+      Assert.equal(
+        tabState.entries.length,
+        2,
+        "We should have 2 entries in the session history."
+      );
+
+      Assert.equal(
+        tabState.entries[0].url,
+        "about:newtab",
+        "about:newtab should be the first entry."
+      );
+
+      Assert.ok(gBrowser.canGoBack, "Should be able to browse back.");
+    }
+  );
+});