Bug 1804654 - Test for nsICookieBannerService rules getter. r=timhuang

Depends on D165173

Differential Revision: https://phabricator.services.mozilla.com/D166293

toolkit/components/cookiebanners/test/browser/browser.ini

@@ -23,6 +23,7 @@ support-files =
 support-files =
     file_iframe_banner.html
 [browser_cookiebannerservice_domainPrefs.js]
+[browser_cookiebannerservice_getRules.js]
 [browser_cookiebannerservice_prefs.js]
 [browser_cookiebannerservice.js]
 [browser_cookiebannerservice_hasRuleForBCTree.js]

toolkit/components/cookiebanners/test/browser/browser_cookiebannerservice_getRules.js

@@ -0,0 +1,86 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+let testRules = [
+  // Cookie rule with multiple domains.
+  {
+    id: "0e4cdbb8-b688-47e0-9c8b-4db620398dbd",
+    click: {},
+    cookies: {
+      optIn: [
+        {
+          name: "foo",
+          value: "bar",
+        },
+      ],
+    },
+    domains: [TEST_DOMAIN_A, TEST_DOMAIN_B],
+  },
+  // Click rule with single domain.
+  {
+    id: "0560e02c-a50f-4e7b-86e0-d6b7d258eb5f",
+    click: {
+      optOut: "#optOutBtn",
+      presence: "#cookieBanner",
+    },
+    cookies: {},
+    domains: [TEST_DOMAIN_C],
+  },
+];
+
+add_setup(async function() {
+  // Enable the service and insert the test rules.
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      [
+        "cookiebanners.service.mode",
+        Ci.nsICookieBannerService.MODE_REJECT_OR_ACCEPT,
+      ],
+      ["cookiebanners.listService.testSkipRemoteSettings", true],
+      ["cookiebanners.listService.testRules", JSON.stringify(testRules)],
+      ["cookiebanners.listService.logLevel", "Debug"],
+    ],
+  });
+});
+
+function ruleCountForDomain(domain) {
+  return Services.cookieBanners.rules.filter(rule =>
+    rule.domains.includes(domain)
+  ).length;
+}
+
+/**
+ * Tests that the rules getter does not return duplicate rules for rules with
+ * multiple domains.
+ */
+add_task(async function test_rules_getter_no_duplicates() {
+  // The rule import is async because it needs to fetch rules from
+  // RemoteSettings. Wait for the test rules to be applied.
+  // See CookieBannerListService#importAllRules.
+  await BrowserTestUtils.waitForCondition(
+    () => Services.cookieBanners.rules.length,
+    "Waiting for test rules to be imported."
+  );
+  is(
+    Services.cookieBanners.rules.length,
+    2,
+    "Rules getter should only return the two test rules."
+  );
+  is(
+    ruleCountForDomain(TEST_DOMAIN_A),
+    1,
+    "There should only be one rule with TEST_DOMAIN_A."
+  );
+  is(
+    ruleCountForDomain(TEST_DOMAIN_B),
+    1,
+    "There should only be one rule with TEST_DOMAIN_B."
+  );
+  is(
+    ruleCountForDomain(TEST_DOMAIN_C),
+    1,
+    "There should only be one rule with TEST_DOMAIN_C."
+  );
+});