1 files changed, 54 insertions, 0 deletions
diff --git a/toolkit/components/antitracking/test/browser/browser_blockingDOMCacheAlwaysPartition.js b/toolkit/components/antitracking/test/browser/browser_blockingDOMCacheAlwaysPartition.js
new file mode 100644
index 0000000000..4cb90af8ad
--- /dev/null
+++ b/toolkit/components/antitracking/test/browser/browser_blockingDOMCacheAlwaysPartition.js
@@ -0,0 +1,54 @@
+requestLongerTimeout(2);
+
+AntiTracking.runTest(
+  "DOM Cache Always Partition Storage",
+  async _ => {
+    let effectiveCookieBehavior = SpecialPowers.isContentWindowPrivate(window)
+      ? SpecialPowers.Services.prefs.getIntPref(
+          "network.cookie.cookieBehavior.pbmode"
+        )
+      : SpecialPowers.Services.prefs.getIntPref(
+          "network.cookie.cookieBehavior"
+        );
+
+    // caches.open still fails for cookieBehavior 2 (reject) and
+    // 1 (reject for third parties), so we need to account for that.
+    let shouldFail =
+      effectiveCookieBehavior ==
+        SpecialPowers.Ci.nsICookieService.BEHAVIOR_REJECT ||
+      (effectiveCookieBehavior ==
+        SpecialPowers.Ci.nsICookieService.BEHAVIOR_REJECT_FOREIGN &&
+        !document.location.href.includes("3rdPartyWO") &&
+        !document.location.href.includes("3rdPartyUI"));
+
+    await caches.open("wow").then(
+      _ => {
+        ok(!shouldFail, "DOM Cache can be used!");
+      },
+      _ => {
+        ok(shouldFail, "DOM Cache can be used!");
+      }
+    );
+  },
+  async _ => {
+    await caches.open("wow").then(
+      _ => {
+        ok(true, "DOM Cache can be used!");
+      },
+      _ => {
+        ok(false, "DOM Cache can be used!");
+      }
+    );
+  },
+  async _ => {
+    await new Promise(resolve => {
+      Services.clearData.deleteData(Ci.nsIClearDataService.CLEAR_ALL, value =>
+        resolve()
+      );
+    });
+  },
+  [
+    ["dom.caches.testing.enabled", true],
+    ["privacy.partition.always_partition_third_party_non_cookie_storage", true],
+  ]
+);