1 files changed, 77 insertions, 0 deletions
diff --git a/docshell/test/browser/browser_bug1347823.js b/docshell/test/browser/browser_bug1347823.js
new file mode 100644
index 0000000000..551ddca8ab
--- /dev/null
+++ b/docshell/test/browser/browser_bug1347823.js
@@ -0,0 +1,77 @@
+/**
+ * Test that session history's expiration tracker would remove bfcache on
+ * expiration.
+ */
+
+// With bfcache not expired.
+add_task(async function testValidCache() {
+  // Make an unrealistic large timeout.
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.sessionhistory.contentViewerTimeout", 86400]],
+  });
+
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: "data:text/html;charset=utf-8,page1" },
+    async function(browser) {
+      // Make a simple modification for bfcache testing.
+      await SpecialPowers.spawn(browser, [], () => {
+        content.document.body.textContent = "modified";
+      });
+
+      // Load a random page.
+      BrowserTestUtils.loadURI(browser, "data:text/html;charset=utf-8,page2");
+      await BrowserTestUtils.browserLoaded(browser);
+
+      // Go back and verify text content.
+      let awaitPageShow = BrowserTestUtils.waitForContentEvent(
+        browser,
+        "pageshow"
+      );
+      browser.goBack();
+      await awaitPageShow;
+      await SpecialPowers.spawn(browser, [], () => {
+        is(content.document.body.textContent, "modified");
+      });
+    }
+  );
+});
+
+// With bfcache expired.
+add_task(async function testExpiredCache() {
+  // Make bfcache timeout in 1 sec.
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.sessionhistory.contentViewerTimeout", 1]],
+  });
+
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: "data:text/html;charset=utf-8,page1" },
+    async function(browser) {
+      // Make a simple modification for bfcache testing.
+      await SpecialPowers.spawn(browser, [], () => {
+        content.document.body.textContent = "modified";
+      });
+
+      // Load a random page.
+      BrowserTestUtils.loadURI(browser, "data:text/html;charset=utf-8,page2");
+      await BrowserTestUtils.browserLoaded(browser);
+
+      // Wait for 3 times of expiration timeout, hopefully it's evicted...
+      await SpecialPowers.spawn(browser, [], () => {
+        return new Promise(resolve => {
+          content.setTimeout(resolve, 3000);
+        });
+      });
+
+      // Go back and verify text content.
+      let awaitPageShow = BrowserTestUtils.waitForContentEvent(
+        browser,
+        "pageshow"
+      );
+      browser.goBack();
+      await awaitPageShow;
+      await SpecialPowers.spawn(browser, [], () => {
+        is(content.document.body.textContent, "page1");
+      });
+    }
+  );
+});