1 files changed, 63 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-sourcemaps-bogus.js b/devtools/client/debugger/test/mochitest/browser_dbg-sourcemaps-bogus.js
new file mode 100644
index 0000000000..b51056bba7
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-sourcemaps-bogus.js
@@ -0,0 +1,63 @@
+/* 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/>. */
+
+// Test that errors while loading sourcemap does not break debugging.
+
+"use strict";
+
+requestLongerTimeout(2);
+
+add_task(async function () {
+  // NOTE: the CORS call makes the test run times inconsistent
+
+  // - non-existant-map.js has a reference to source map file which doesn't exists.
+  //   There is no particular warning and no original file is displayed, only the generated file.
+  // - map-with-failed-original-request.js has a reference to a valid source map file,
+  //   but the map doesn't inline source content and refers to a URL which fails loading.
+  //   (this file is based on dom-mutation.js and related map)
+  const dbg = await initDebugger(
+    "doc-sourcemap-bogus.html",
+    "non-existant-map.js",
+    "map-with-failed-original-request.js",
+    "map-with-failed-original-request.original.js"
+  );
+  // Make sure there is only the expected sources and we miss some original sources.
+  is(dbg.selectors.getSourceCount(), 3, "Only 3 source exists");
+
+  await selectSource(dbg, "non-existant-map.js");
+
+  // We should still be able to set breakpoints and pause in the
+  // generated source.
+  await addBreakpoint(dbg, "non-existant-map.js", 4);
+  invokeInTab("runCode");
+  await waitForPaused(dbg);
+  assertPausedAtSourceAndLine(
+    dbg,
+    findSource(dbg, "non-existant-map.js").id,
+    4
+  );
+  await resume(dbg);
+
+  await selectSource(dbg, "map-with-failed-original-request.js");
+  await addBreakpoint(dbg, "map-with-failed-original-request.js", 7);
+  invokeInTab("changeStyleAttribute");
+  await waitForPaused(dbg);
+
+  // As the original file can't be loaded, the generated source is automatically selected
+  assertPausedAtSourceAndLine(
+    dbg,
+    findSource(dbg, "map-with-failed-original-request.js").id,
+    7
+  );
+
+  // The original file is visible in the source tree and can be selected,
+  // but its content can't be displayed
+  await selectSource(dbg, "map-with-failed-original-request.original.js");
+  is(
+    getCM(dbg).getValue(),
+    `Error while fetching an original source: request failed with status 404\nSource URL: ${EXAMPLE_URL}map-with-failed-original-request.original.js`
+  );
+
+  await resume(dbg);
+});