1 files changed, 84 insertions, 0 deletions
diff --git a/netwerk/test/mochitests/file_testcommon.js b/netwerk/test/mochitests/file_testcommon.js
new file mode 100644
index 0000000000..4a9b0504e9
--- /dev/null
+++ b/netwerk/test/mochitests/file_testcommon.js
@@ -0,0 +1,84 @@
+"use strict";
+
+const SCRIPT_URL = SimpleTest.getTestFileURL("file_chromecommon.js");
+
+var gExpectedCookies;
+var gExpectedLoads;
+
+var gPopup;
+
+var gScript;
+
+var gLoads = 0;
+
+function setupTest(uri, cookies, loads) {
+  SimpleTest.waitForExplicitFinish();
+
+  var prefSet = new Promise(resolve => {
+    SpecialPowers.pushPrefEnv(
+      {
+        set: [
+          ["network.cookie.cookieBehavior", 1],
+          // cookieBehavior 1 allows cookies from chrome script if we enable
+          // exceptions.
+          // Bug 1617611: Fix all the tests broken by "cookies SameSite=lax by default"
+          ["network.cookie.sameSite.laxByDefault", false],
+        ],
+      },
+      resolve
+    );
+  });
+
+  gScript = SpecialPowers.loadChromeScript(SCRIPT_URL);
+  gExpectedCookies = cookies;
+  gExpectedLoads = loads;
+
+  // Listen for MessageEvents.
+  window.addEventListener("message", messageReceiver);
+
+  prefSet.then(() => {
+    // load a window which contains an iframe; each will attempt to set
+    // cookies from their respective domains.
+    gPopup = window.open(uri, "hai", "width=100,height=100");
+  });
+}
+
+function finishTest() {
+  gScript.destroy();
+  SpecialPowers.clearUserPref("network.cookie.sameSite.laxByDefault");
+  SimpleTest.finish();
+}
+
+/** Receives MessageEvents to this window. */
+// Count and check loads.
+function messageReceiver(evt) {
+  is(evt.data, "message", "message data received from popup");
+  if (evt.data != "message") {
+    gPopup.close();
+    window.removeEventListener("message", messageReceiver);
+
+    finishTest();
+    return;
+  }
+
+  // only run the test when all our children are done loading & setting cookies
+  if (++gLoads == gExpectedLoads) {
+    gPopup.close();
+    window.removeEventListener("message", messageReceiver);
+
+    runTest();
+  }
+}
+
+// runTest() is run by messageReceiver().
+// Count and check cookies.
+function runTest() {
+  // set a cookie from a domain of "localhost"
+  document.cookie = "oh=hai";
+
+  gScript.addMessageListener("getCookieCountAndClear:return", ({ count }) => {
+    is(count, gExpectedCookies, "total number of cookies");
+    finishTest();
+  });
+  gScript.sendAsyncMessage("getCookieCountAndClear");
+}