1 files changed, 51 insertions, 0 deletions
diff --git a/devtools/client/framework/test/browser_source_map-init.js b/devtools/client/framework/test/browser_source_map-init.js
new file mode 100644
index 0000000000..60a3e4672a
--- /dev/null
+++ b/devtools/client/framework/test/browser_source_map-init.js
@@ -0,0 +1,51 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test that the source map service initializes properly when source
+// actors have already been created.  Regression test for bug 1391768.
+
+"use strict";
+
+const JS_URL = URL_ROOT_SSL + "code_bundle_no_race.js";
+
+const PAGE_URL = `data:text/html,
+<!doctype html>
+
+<html>
+  <head>
+    <meta charset="utf-8"/>
+    <title>Empty test page to test race case</title>
+  </head>
+
+  <body>
+    <script src="${JS_URL}"></script>
+  </body>
+
+</html>`;
+
+const ORIGINAL_URL = "webpack:///code_no_race.js";
+
+const GENERATED_LINE = 84;
+const ORIGINAL_LINE = 11;
+
+add_task(async function () {
+  // Opening the debugger causes the source actors to be created.
+  const toolbox = await openNewTabAndToolbox(PAGE_URL, "jsdebugger");
+  // In bug 1391768, when the sourceMapURLService was created, it was
+  // ignoring any source actors that already existed, leading to
+  // source-mapping failures for those.
+  const service = toolbox.sourceMapURLService;
+
+  info(`checking original location for ${JS_URL}:${GENERATED_LINE}`);
+  const newLoc = await new Promise(r =>
+    service.subscribeByURL(JS_URL, GENERATED_LINE, undefined, r)
+  );
+  is(newLoc.url, ORIGINAL_URL, "check mapped URL");
+  is(newLoc.line, ORIGINAL_LINE, "check mapped line number");
+
+  // See Bug 1637793 and Bug 1621337.
+  // Ideally the debugger should only resolve when the worker targets have been
+  // retrieved, which should be fixed by Bug 1621337 or a followup.
+  info("Wait for all pending requests to settle on the DevToolsClient");
+  await toolbox.commands.client.waitForRequestsToSettle();
+});