diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_blackboxing-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_blackboxing-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,51 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that if we black box a source and then refresh, it is still black boxed.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_binary_search.html";
+
+let gTab, gDebuggee, gPanel, gDebugger;
+
+function test() {
+  initDebugger(TAB_URL).then(([aTab, aDebuggee, aPanel]) => {
+    gTab = aTab;
+    gDebuggee = aDebuggee;
+    gPanel = aPanel;
+    gDebugger = gPanel.panelWin;
+
+    waitForSourceShown(gPanel, ".coffee")
+      .then(testBlackBoxSource)
+      .then(testBlackBoxReload)
+      .then(() => closeDebuggerAndFinish(gPanel))
+      .then(null, aError => {
+        ok(false, "Got an error: " + aError.message + "\n" + aError.stack);
+      });
+  });
+}
+
+function testBlackBoxSource() {
+  const bbButton = getBlackBoxButton(gPanel);
+  ok(!bbButton.checked, "Should not be black boxed by default");
+
+  return toggleBlackBoxing(gPanel).then(aSource => {
+    ok(aSource.isBlackBoxed, "The source should be black boxed now.");
+    ok(bbButton.checked, "The checkbox should no longer be checked.");
+  });
+}
+
+function testBlackBoxReload() {
+  return reloadActiveTab(gPanel, gDebugger.EVENTS.SOURCE_SHOWN).then(() => {
+    const bbButton = getBlackBoxButton(gPanel);
+    ok(bbButton.checked, "Should still be black boxed.");
+  });
+}
+
+registerCleanupFunction(function() {
+  gTab = null;
+  gDebuggee = null;
+  gPanel = null;
+  gDebugger = null;
+});