1 files changed, 79 insertions, 0 deletions
diff --git a/toolkit/components/remotebrowserutils/tests/browser/browser_externalLinkBlanksPage.js b/toolkit/components/remotebrowserutils/tests/browser/browser_externalLinkBlanksPage.js
new file mode 100644
index 0000000000..3cdfed48cc
--- /dev/null
+++ b/toolkit/components/remotebrowserutils/tests/browser/browser_externalLinkBlanksPage.js
@@ -0,0 +1,79 @@
+/*
+ * Test that following a link with a scheme that opens externally (like
+ * irc:) does not blank the page (Bug 1630757).
+ */
+
+const { HandlerServiceTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/HandlerServiceTestUtils.sys.mjs"
+);
+
+let gHandlerService = Cc["@mozilla.org/uriloader/handler-service;1"].getService(
+  Ci.nsIHandlerService
+);
+
+let Pages = [httpURL("dummy_page.html"), fileURL("dummy_page.html")];
+
+/**
+ * Creates dummy protocol handler
+ */
+function initTestHandlers() {
+  let handlerInfo =
+    HandlerServiceTestUtils.getBlankHandlerInfo("test-proto://");
+
+  let appHandler = Cc[
+    "@mozilla.org/uriloader/local-handler-app;1"
+  ].createInstance(Ci.nsILocalHandlerApp);
+  // This is a dir and not executable, but that's enough for here.
+  appHandler.executable = Services.dirsvc.get("XCurProcD", Ci.nsIFile);
+  handlerInfo.possibleApplicationHandlers.appendElement(appHandler);
+  handlerInfo.preferredApplicationHandler = appHandler;
+  handlerInfo.preferredAction = handlerInfo.useHelperApp;
+  handlerInfo.alwaysAskBeforeHandling = false;
+  gHandlerService.store(handlerInfo);
+
+  registerCleanupFunction(() => {
+    gHandlerService.remove(handlerInfo);
+  });
+}
+
+async function runTest() {
+  initTestHandlers();
+
+  for (let page of Pages) {
+    await BrowserTestUtils.withNewTab(page, async function (aBrowser) {
+      await SpecialPowers.spawn(aBrowser, [], async () => {
+        let h = content.document.createElement("h1");
+        ok(h);
+        h.innerHTML = "My heading";
+        h.id = "my-heading";
+        content.document.body.append(h);
+        is(content.document.getElementById("my-heading"), h, "h exists");
+
+        let a = content.document.createElement("a");
+        ok(a);
+        a.innerHTML = "my link";
+        a.id = "my-link";
+        content.document.body.append(a);
+      });
+
+      await SpecialPowers.spawn(aBrowser, [], async () => {
+        let url = "test-proto://some-thing";
+
+        let a = content.document.getElementById("my-link");
+        ok(a);
+        a.href = url;
+        a.click();
+      });
+
+      await SpecialPowers.spawn(aBrowser, [], async () => {
+        ok(
+          content.document.getElementById("my-heading"),
+          "Page contents not erased"
+        );
+      });
+    });
+  }
+  await SpecialPowers.popPrefEnv();
+}
+
+add_task(runTest);