Bug 1372072 - Part 2: Add a test case for check whether network information API has been spoofed correctly when 'privacy.resistFingerprinting' is true. r=arthuredelstein,baku

This adds a test case to test that network information is correctly spoofed when
'privacy.resistFingerprinting' is true. This tests not only windows, but also
workers.

MozReview-Commit-ID: Lt6HZlFrcja

--HG--
extra : rebase_source : 6040bc8697be2665f4063df9b24bc8afdc549e32
extra : source : fe711bd124f6e904548b3f4d90fa321deea78615

browser/components/resistfingerprinting/test/browser/browser.ini

@@ -4,10 +4,12 @@ support-files =
   file_dummy.html
   file_navigator.html
   file_navigatorWorker.js
+  file_workerNetInfo.js
   file_workerPerformance.js
   head.js
 
 [browser_navigator.js]
+[browser_netInfo.js]
 [browser_performanceAPI.js]
 [browser_roundedWindow_dialogWindow.js]
 [browser_roundedWindow_newWindow.js]

browser/components/resistfingerprinting/test/browser/browser_netInfo.js

@@ -0,0 +1,61 @@
+/**
+ * Bug 1372072 - A test case for check whether network information API has been
+ *   spoofed correctly when 'privacy.resistFingerprinting' is true;
+ */
+
+const TEST_PATH = "http://example.net/browser/browser/" +
+                  "components/resistfingerprinting/test/browser/"
+
+
+async function testWindow() {
+  // Open a tab to test network information in a content.
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser, TEST_PATH + "file_dummy.html");
+
+  await ContentTask.spawn(tab.linkedBrowser, null, async function() {
+    ok("connection" in content.navigator, "navigator.connection should exist");
+
+    is(content.navigator.connection.type, "unknown", "The connection type is spoofed correctly");
+  });
+
+  await BrowserTestUtils.removeTab(tab);
+}
+
+async function testWorker() {
+  // Open a tab to test network information in a worker.
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser, TEST_PATH + "file_dummy.html");
+
+  await ContentTask.spawn(tab.linkedBrowser, null, async function() {
+
+    await new Promise(resolve => {
+      let worker = new content.Worker("file_workerNetInfo.js");
+
+      worker.onmessage = function(e) {
+        if (e.data.type == "status") {
+          ok(e.data.status, e.data.msg);
+        } else if (e.data.type == "finish") {
+          resolve();
+        } else {
+          ok(false, "Unknown message type");
+          resolve();
+        }
+      }
+      worker.postMessage({type: "runTests"});
+    });
+  });
+
+  await BrowserTestUtils.removeTab(tab);
+}
+
+add_task(async function runTest() {
+  await SpecialPowers.pushPrefEnv({"set":
+    [
+      ["privacy.resistFingerprinting", true],
+      ["dom.netinfo.enabled",          true]
+    ]
+  });
+
+  await testWindow();
+  await testWorker();
+});

browser/components/resistfingerprinting/test/browser/file_workerNetInfo.js

@@ -0,0 +1,26 @@
+function ok(a, msg) {
+  postMessage({type: "status", status: !!a, msg});
+}
+
+function is(a, b, msg) {
+  ok(a === b, msg);
+}
+
+function finish() {
+  postMessage({type: "finish"});
+}
+
+function runTests() {
+  ok("connection" in navigator, "navigator.connection should exist");
+  is(navigator.connection.type, "unknown", "The connection type is spoofed correctly");
+
+  finish();
+}
+
+self.onmessage = function(e) {
+  if (e.data.type === "runTests") {
+    runTests();
+  } else {
+    ok(false, "Unknown message type");
+  }
+}