1 files changed, 60 insertions, 0 deletions
diff --git a/toolkit/mozapps/extensions/test/browser/browser_webapi_install_disabled.js b/toolkit/mozapps/extensions/test/browser/browser_webapi_install_disabled.js
new file mode 100644
index 0000000000..5bc291fe7a
--- /dev/null
+++ b/toolkit/mozapps/extensions/test/browser/browser_webapi_install_disabled.js
@@ -0,0 +1,60 @@
+const TESTPAGE = `${SECURE_TESTROOT}webapi_checkavailable.html`;
+const XPI_URL = `${SECURE_TESTROOT}../xpinstall/amosigned.xpi`;
+
+function waitForClear() {
+  const MSG = "WebAPICleanup";
+  return new Promise(resolve => {
+    let listener = {
+      receiveMessage(msg) {
+        if (msg.name == MSG) {
+          Services.mm.removeMessageListener(MSG, listener);
+          resolve();
+        }
+      },
+    };
+
+    Services.mm.addMessageListener(MSG, listener, true);
+  });
+}
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["extensions.webapi.testing", true],
+      ["xpinstall.enabled", false],
+      ["extensions.install.requireBuiltInCerts", false],
+    ],
+  });
+  info("added preferences");
+});
+
+async function testInstall(browser, args) {
+  let success = await SpecialPowers.spawn(
+    browser,
+    [{ args }],
+    async function (opts) {
+      let { args } = opts;
+      let install;
+      try {
+        install = await content.navigator.mozAddonManager.createInstall(args);
+      } catch (e) {}
+      return !!install;
+    }
+  );
+  is(success, false, "Install was blocked");
+}
+
+add_task(async function () {
+  // withNewTab() will close the test tab before returning, at which point
+  // the cleanup event will come from the content process.  We need to see
+  // that event but don't want to race to install a listener for it after
+  // the tab is closed.  So set up the listener now but don't yield the
+  // listening promise until below.
+  let clearPromise = waitForClear();
+
+  await BrowserTestUtils.withNewTab(TESTPAGE, async function (browser) {
+    await testInstall(browser, { url: XPI_URL });
+  });
+
+  await clearPromise;
+});