1 files changed, 45 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-preview-source-maps.js b/devtools/client/debugger/test/mochitest/browser_dbg-preview-source-maps.js
new file mode 100644
index 0000000000..ddf9945ef5
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-preview-source-maps.js
@@ -0,0 +1,45 @@
+/* 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/>. */
+
+"use strict";
+
+add_task(async function () {
+  const dbg = await initDebugger(
+    "doc-sourcemaps.html",
+    "entry.js",
+    "output.js",
+    "times2.js",
+    "opts.js"
+  );
+
+  await selectSource(dbg, "times2.js");
+  await addBreakpoint(dbg, "times2.js", 2);
+
+  invokeInTab("keepMeAlive");
+  await waitForPaused(dbg);
+  await waitForSelectedSource(dbg, "times2.js");
+
+  info("Test previewing in the original location");
+  await assertPreviews(dbg, [
+    { line: 2, column: 10, result: 4, expression: "x" },
+  ]);
+
+  info("Test previewing in the generated location");
+  await dbg.actions.jumpToMappedSelectedLocation(getContext(dbg));
+  await waitForSelectedSource(dbg, "bundle.js");
+  await assertPreviews(dbg, [
+    { line: 70, column: 11, result: 4, expression: "x" },
+  ]);
+
+  info("Test that you can not preview in another original file");
+  await selectSource(dbg, "output.js");
+  await hoverAtPos(dbg, { line: 2, ch: 16 });
+  await assertNoTooltip(dbg);
+});
+
+async function assertNoTooltip(dbg) {
+  await wait(200);
+  const el = findElement(dbg, "tooltip");
+  is(el, null, "Tooltip should not exist");
+}