diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_source-maps-03.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_source-maps-03.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,81 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that we can debug minified javascript with source maps.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_minified.html";
+const JS_URL = EXAMPLE_URL + "code_math.js";
+
+let gDebuggee, gPanel, gDebugger;
+let gEditor, gSources, gFrames;
+
+function test() {
+  initDebugger(TAB_URL).then(([aTab, aDebuggee, aPanel]) => {
+    gDebuggee = aDebuggee;
+    gPanel = aPanel;
+    gDebugger = gPanel.panelWin;
+    gEditor = gDebugger.DebuggerView.editor;
+    gSources = gDebugger.DebuggerView.Sources;
+    gFrames = gDebugger.DebuggerView.StackFrames;
+
+    waitForSourceShown(gPanel, JS_URL)
+      .then(checkInitialSource)
+      .then(testSetBreakpoint)
+      .then(() => resumeDebuggerThenCloseAndFinish(gPanel))
+      .then(null, aError => {
+        ok(false, "Got an error: " + aError.message + "\n" + aError.stack);
+      });
+  });
+}
+
+function checkInitialSource() {
+  isnot(gSources.selectedValue.indexOf(".js"), -1,
+    "The debugger should not show the minified js file.");
+  is(gSources.selectedValue.indexOf(".min.js"), -1,
+    "The debugger should show the original js file.");
+  is(gEditor.getText().split("\n").length, 46,
+    "The debugger's editor should have the original source displayed, " +
+    "not the whitespace stripped minified version.");
+}
+
+function testSetBreakpoint() {
+  let deferred = promise.defer();
+
+  gDebugger.gThreadClient.setBreakpoint({ url: JS_URL, line: 30, column: 21 }, aResponse => {
+    ok(!aResponse.error,
+      "Should be able to set a breakpoint in a js file.");
+    ok(!aResponse.actualLocation,
+      "Should be able to set a breakpoint on line 30 and column 10.");
+
+    gDebugger.gClient.addOneTimeListener("resumed", () => {
+      waitForCaretAndScopes(gPanel, 30).then(() => {
+        // Make sure that we have the right stack frames.
+        is(gFrames.itemCount, 9,
+          "Should have nine frames.");
+        is(gFrames.getItemAtIndex(0).attachment.url.indexOf(".min.js"), -1,
+          "First frame should not be a minified JS frame.");
+        isnot(gFrames.getItemAtIndex(0).attachment.url.indexOf(".js"), -1,
+          "First frame should be a JS frame.");
+
+        deferred.resolve();
+      });
+
+      // This will cause the breakpoint to be hit, and put us back in the
+      // paused state.
+      gDebuggee.arithmetic();
+    });
+  });
+
+  return deferred.promise;
+}
+
+registerCleanupFunction(function() {
+  gDebuggee = null;
+  gPanel = null;
+  gDebugger = null;
+  gEditor = null;
+  gSources = null;
+  gFrames = null;
+});