diff -r 000000000000 -r 6474c204b198 toolkit/devtools/server/tests/unit/test_source-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/devtools/server/tests/unit/test_source-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,78 @@
+/* -*- Mode: javascript; js-indent-level: 2; -*- */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+var gDebuggee;
+var gClient;
+var gThreadClient;
+
+// This test ensures that we can create SourceActors and SourceClients properly,
+// and that they can communicate over the protocol to fetch the source text for
+// a given script.
+
+function run_test()
+{
+  initTestDebuggerServer();
+  gDebuggee = addTestGlobal("test-grips");
+  Cu.evalInSandbox(
+    "" + function stopMe(arg1) {
+      debugger;
+    },
+    gDebuggee,
+    "1.8",
+    getFileUrl("test_source-01.js")
+  );
+
+  gClient = new DebuggerClient(DebuggerServer.connectPipe());
+  gClient.connect(function() {
+    attachTestTabAndResume(gClient, "test-grips", function(aResponse, aTabClient, aThreadClient) {
+      gThreadClient = aThreadClient;
+      test_source();
+    });
+  });
+  do_test_pending();
+}
+
+const SOURCE_URL = "http://example.com/foobar.js";
+const SOURCE_CONTENT = "stopMe()";
+
+function test_source()
+{
+  DebuggerServer.LONG_STRING_LENGTH = 200;
+
+  gThreadClient.addOneTimeListener("paused", function(aEvent, aPacket) {
+    gThreadClient.getSources(function (aResponse) {
+      do_check_true(!!aResponse);
+      do_check_true(!!aResponse.sources);
+
+      let source = aResponse.sources.filter(function (s) {
+        return s.url === SOURCE_URL;
+      })[0];
+
+      do_check_true(!!source);
+
+      let sourceClient = gThreadClient.source(source);
+      sourceClient.source(function (aResponse) {
+        do_check_true(!!aResponse);
+        do_check_true(!aResponse.error);
+        do_check_true(!!aResponse.contentType);
+        do_check_true(aResponse.contentType.contains("javascript"));
+
+        do_check_true(!!aResponse.source);
+        do_check_eq(SOURCE_CONTENT,
+                    aResponse.source);
+
+        gThreadClient.resume(function () {
+          finishClient(gClient);
+        });
+      });
+    });
+  });
+
+  Cu.evalInSandbox(
+    SOURCE_CONTENT,
+    gDebuggee,
+    "1.8",
+    SOURCE_URL
+  );
+}