1 files changed, 74 insertions, 0 deletions
diff --git a/dom/security/test/https-first/browser_httpsfirst.js b/dom/security/test/https-first/browser_httpsfirst.js
new file mode 100644
index 0000000000..733474dcc1
--- /dev/null
+++ b/dom/security/test/https-first/browser_httpsfirst.js
@@ -0,0 +1,74 @@
+"use strict";
+
+const TEST_PATH_HTTP = getRootDirectory(gTestPath).replace(
+  "chrome://mochitests/content",
+  "http://example.com"
+);
+
+const TIMEOUT_PAGE_URI_HTTP =
+  TEST_PATH_HTTP + "file_httpsfirst_timeout_server.sjs";
+
+async function runPrefTest(aURI, aDesc, aAssertURLStartsWith) {
+  await BrowserTestUtils.withNewTab("about:blank", async function (browser) {
+    const loaded = BrowserTestUtils.browserLoaded(browser, false, null, true);
+    BrowserTestUtils.startLoadingURIString(browser, aURI);
+    await loaded;
+
+    await ContentTask.spawn(
+      browser,
+      { aDesc, aAssertURLStartsWith },
+      function ({ aDesc, aAssertURLStartsWith }) {
+        ok(
+          content.document.location.href.startsWith(aAssertURLStartsWith),
+          aDesc
+        );
+      }
+    );
+  });
+}
+
+add_task(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [["dom.security.https_first", false]],
+  });
+
+  await runPrefTest(
+    "http://example.com",
+    "HTTPS-First disabled; Should not upgrade",
+    "http://"
+  );
+
+  await SpecialPowers.pushPrefEnv({
+    set: [["dom.security.https_first", true]],
+  });
+
+  await runPrefTest(
+    "http://example.com",
+    "Should upgrade upgradeable website",
+    "https://"
+  );
+
+  await runPrefTest(
+    "http://httpsfirst.com",
+    "Should downgrade after error.",
+    "http://"
+  );
+
+  await runPrefTest(
+    "http://httpsfirst.com/?https://httpsfirst.com",
+    "Should downgrade after error and leave query params untouched.",
+    "http://httpsfirst.com/?https://httpsfirst.com"
+  );
+
+  await runPrefTest(
+    "http://domain.does.not.exist",
+    "Should not downgrade on dnsNotFound error.",
+    "https://"
+  );
+
+  await runPrefTest(
+    TIMEOUT_PAGE_URI_HTTP,
+    "Should downgrade after timeout.",
+    "http://"
+  );
+});