diff -r 000000000000 -r 6474c204b198 toolkit/devtools/server/tests/unit/test_listsources-03.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/devtools/server/tests/unit/test_listsources-03.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Check getSources functionality when there are lots of sources.
+ */
+
+var gDebuggee;
+var gClient;
+var gThreadClient;
+
+function run_test()
+{
+  initTestDebuggerServer();
+  gDebuggee = addTestGlobal("test-sources");
+  gClient = new DebuggerClient(DebuggerServer.connectPipe());
+  gClient.connect(function () {
+    attachTestTabAndResume(gClient, "test-sources", function (aResponse, aTabClient, aThreadClient) {
+      gThreadClient = aThreadClient;
+      test_simple_listsources();
+    });
+  });
+  do_test_pending();
+}
+
+function test_simple_listsources()
+{
+  gThreadClient.addOneTimeListener("paused", function (aEvent, aPacket) {
+    gThreadClient.getSources(function (aResponse) {
+      do_check_true(
+        !aResponse.error,
+        "There shouldn't be an error fetching large amounts of sources.");
+
+      do_check_true(aResponse.sources.some(function (s) {
+        return s.url.match(/foo-999.js$/);
+      }));
+
+      gThreadClient.resume(function () {
+        finishClient(gClient);
+      });
+    });
+  });
+
+  for (let i = 0; i < 1000; i++) {
+    Cu.evalInSandbox("function foo###() {return ###;}".replace(/###/g, i),
+                     gDebuggee,
+                     "1.8",
+                     "http://example.com/foo-" + i + ".js",
+                     1);
+  }
+  gDebuggee.eval("debugger;");
+}