1 files changed, 54 insertions, 0 deletions
diff --git a/browser/components/newtab/test/browser/abouthomecache/browser_sanitize.js b/browser/components/newtab/test/browser/abouthomecache/browser_sanitize.js
new file mode 100644
index 0000000000..4dc7ba2c89
--- /dev/null
+++ b/browser/components/newtab/test/browser/abouthomecache/browser_sanitize.js
@@ -0,0 +1,54 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Tests that when sanitizing places history, session store or downloads, that
+ * the about:home cache gets blown away.
+ */
+
+add_task(async function test_sanitize() {
+  let testFlags = [
+    ["downloads", Ci.nsIClearDataService.CLEAR_DOWNLOADS],
+    ["places history", Ci.nsIClearDataService.CLEAR_HISTORY],
+    ["session history", Ci.nsIClearDataService.CLEAR_SESSION_HISTORY],
+  ];
+
+  await withFullyLoadedAboutHome(async browser => {
+    for (let [type, flag] of testFlags) {
+      await simulateRestart(browser);
+      await ensureCachedAboutHome(browser);
+
+      info(
+        "Testing that the about:home startup cache is cleared when " +
+          `clearing ${type}`
+      );
+
+      await new Promise((resolve, reject) => {
+        Services.clearData.deleteData(flag, {
+          onDataDeleted(resultFlags) {
+            if (!resultFlags) {
+              resolve();
+            } else {
+              reject(new Error(`Failed with flags: ${resultFlags}`));
+            }
+          },
+        });
+      });
+
+      // For the purposes of the test, we don't want the write-on-shutdown
+      // behaviour here (because we just want to test that the cache doesn't
+      // exist on startup if the history data was cleared). We also therefore
+      // don't need to ensure that the cache wins the race.
+      await simulateRestart(browser, {
+        withAutoShutdownWrite: false,
+        ensureCacheWinsRace: false,
+      });
+      await ensureDynamicAboutHome(
+        browser,
+        AboutHomeStartupCache.CACHE_RESULT_SCALARS.DOES_NOT_EXIST
+      );
+    }
+  });
+});