Bug 1738227 - Reset parsedPolicies when policy engine is restarted in tests. r=pbz

Differential Revision: https://phabricator.services.mozilla.com/D130115

browser/components/BrowserGlue.jsm

@@ -4687,9 +4687,7 @@ var ContentBlockingCategoriesPrefs = {
     // If there is a custom policy which changes a related pref, then put the user in custom so
     // they still have access to other content blocking prefs, and to keep our default definitions
     // from changing.
-    let policy =
-      Services.policies.status != Ci.nsIEnterprisePolicies.INACTIVE &&
-      Services.policies.getActivePolicies();
+    let policy = Services.policies.getActivePolicies();
     if (policy && (policy.EnableTrackingProtection || policy.Cookies)) {
       Services.prefs.setStringPref(this.PREF_CB_CATEGORY, "custom");
     }

toolkit/components/enterprisepolicies/EnterprisePoliciesParent.jsm

@@ -249,6 +249,7 @@ EnterprisePoliciesManager.prototype = {
     Services.ppmm.sharedData.delete("EnterprisePolicies:DisallowedFeatures");
 
     this._status = Ci.nsIEnterprisePolicies.UNINITIALIZED;
+    this._parsedPolicies = undefined;
     for (let timing of Object.keys(this._callbacks)) {
       this._callbacks[timing] = [];
     }

toolkit/components/enterprisepolicies/tests/browser/browser_policies_basic_tests.js

@@ -124,3 +124,17 @@ add_task(async function test_simple_policies() {
   delete Policies.simple_policy2;
   delete Policies.simple_policy3;
 });
+
+add_task(async function test_policy_cleanup() {
+  await EnterprisePolicyTesting.setupPolicyEngineWithJson("");
+  is(
+    Services.policies.getActivePolicies(),
+    undefined,
+    "No policies should be defined"
+  );
+  is(
+    Services.policies.status,
+    Ci.nsIEnterprisePolicies.INACTIVE,
+    "Engine is inactive at the end of the test"
+  );
+});