diff -r 000000000000 -r 6474c204b198 toolkit/devtools/server/tests/unit/test_blackboxing-04.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/devtools/server/tests/unit/test_blackboxing-04.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,79 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test behavior of blackboxing sources we are currently paused in.
+ */
+
+var gDebuggee;
+var gClient;
+var gThreadClient;
+
+function run_test()
+{
+  initTestDebuggerServer();
+  gDebuggee = addTestGlobal("test-black-box");
+  gClient = new DebuggerClient(DebuggerServer.connectPipe());
+  gClient.connect(function() {
+    attachTestTabAndResume(gClient, "test-black-box", function(aResponse, aTabClient, aThreadClient) {
+      gThreadClient = aThreadClient;
+      test_black_box();
+    });
+  });
+  do_test_pending();
+}
+
+const BLACK_BOXED_URL = "http://example.com/blackboxme.js";
+const SOURCE_URL = "http://example.com/source.js";
+
+function test_black_box()
+{
+  gClient.addOneTimeListener("paused", function () {
+    gThreadClient.setBreakpoint({
+      url: BLACK_BOXED_URL,
+      line: 2
+    }, function (aResponse) {
+      do_check_true(!aResponse.error, "Should be able to set breakpoint.");
+      test_black_box_paused();
+    });
+  });
+
+  Components.utils.evalInSandbox(
+    "" + function doStuff(k) { // line 1
+      debugger;                // line 2
+      k(100);                  // line 3
+    },                         // line 4
+    gDebuggee,
+    "1.8",
+    BLACK_BOXED_URL,
+    1
+  );
+
+  Components.utils.evalInSandbox(
+    "" + function runTest() { // line 1
+      doStuff(                // line 2
+        function (n) {        // line 3
+          return n;           // line 4
+        }                     // line 5
+      );                      // line 6
+    }                         // line 7
+    + "\n runTest();",        // line 8
+    gDebuggee,
+    "1.8",
+    SOURCE_URL,
+    1
+  );
+}
+
+function test_black_box_paused() {
+  gThreadClient.getSources(function ({error, sources}) {
+    do_check_true(!error, "Should not get an error: " + error);
+    let sourceClient = gThreadClient.source(sources.filter(s => s.url == BLACK_BOXED_URL)[0]);
+
+    sourceClient.blackBox(function ({error, pausedInSource}) {
+      do_check_true(!error, "Should not get an error: " + error);
+      do_check_true(pausedInSource, "We should be notified that we are currently paused in this source");
+      finishClient(gClient);
+    });
+  });
+}