Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 47 insertions, 0 deletions

diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-step-in-uninitialized.js b/devtools/client/debugger/test/mochitest/browser_dbg-step-in-uninitialized.js
new file mode 100644
index 0000000000..3f135dde68
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-step-in-uninitialized.js
@@ -0,0 +1,47 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+// When stepping into a function, 'let' variables should show as uninitialized
+// instead of undefined.
+
+"use strict";
+
+add_task(async function test() {
+  const dbg = await initDebugger("doc-step-in-uninitialized.html");
+  invokeInTab("main");
+  await waitForPaused(dbg, "doc-step-in-uninitialized.html");
+
+  await stepOver(dbg);
+  await stepIn(dbg);
+
+  assertPausedAtSourceAndLine(
+    dbg,
+    findSource(dbg, "doc-step-in-uninitialized.html").id,
+    8
+  );
+
+  // We step past the 'let x' at the start of the function because it is not
+  // a breakpoint position.
+  Assert.equal(findNodeValue(dbg, "x"), "undefined", "x undefined");
+  Assert.equal(findNodeValue(dbg, "y"), "(uninitialized)", "y uninitialized");
+
+  await stepOver(dbg);
+
+  assertPausedAtSourceAndLine(
+    dbg,
+    findSource(dbg, "doc-step-in-uninitialized.html").id,
+    9
+  );
+
+  Assert.equal(findNodeValue(dbg, "y"), "3", "y initialized");
+});
+
+function findNodeValue(dbg, text) {
+  for (let index = 0; ; index++) {
+    const elem = findElement(dbg, "scopeNode", index);
+    if (elem?.innerText == text) {
+      return getScopeNodeValue(dbg, index);
+    }
+  }
+}