diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_source-maps-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_source-maps-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,165 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that we can set breakpoints and step through source mapped
+ * coffee script.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_binary_search.html";
+const COFFEE_URL = EXAMPLE_URL + "code_binary_search.coffee";
+
+let gTab, gDebuggee, gPanel, gDebugger;
+let gEditor, gSources;
+
+function test() {
+  initDebugger(TAB_URL).then(([aTab, aDebuggee, aPanel]) => {
+    gTab = aTab;
+    gDebuggee = aDebuggee;
+    gPanel = aPanel;
+    gDebugger = gPanel.panelWin;
+    gEditor = gDebugger.DebuggerView.editor;
+    gSources = gDebugger.DebuggerView.Sources;
+
+    checkSourceMapsEnabled();
+
+    waitForSourceShown(gPanel, ".coffee")
+      .then(checkInitialSource)
+      .then(testSetBreakpoint)
+      .then(testSetBreakpointBlankLine)
+      .then(testHitBreakpoint)
+      .then(testStepping)
+      .then(() => resumeDebuggerThenCloseAndFinish(gPanel))
+      .then(null, aError => {
+        ok(false, "Got an error: " + aError.message + "\n" + aError.stack);
+      });
+  });
+}
+
+function checkSourceMapsEnabled() {
+  is(Services.prefs.getBoolPref("devtools.debugger.source-maps-enabled"), true,
+    "The source maps functionality should be enabled by default.");
+  is(gDebugger.Prefs.sourceMapsEnabled, true,
+    "The source maps pref should be true from startup.");
+  is(gDebugger.DebuggerView.Options._showOriginalSourceItem.getAttribute("checked"), "true",
+    "Source maps should be enabled from startup.")
+}
+
+function checkInitialSource() {
+  isnot(gSources.selectedValue.indexOf(".coffee"), -1,
+    "The debugger should show the source mapped coffee source file.");
+  is(gSources.selectedValue.indexOf(".js"), -1,
+    "The debugger should not show the generated js source file.");
+  is(gEditor.getText().indexOf("isnt"), 218,
+    "The debugger's editor should have the coffee source source displayed.");
+  is(gEditor.getText().indexOf("function"), -1,
+    "The debugger's editor should not have the JS source displayed.");
+}
+
+function testSetBreakpoint() {
+  let deferred = promise.defer();
+
+  gDebugger.gThreadClient.interrupt(aResponse => {
+    gDebugger.gThreadClient.setBreakpoint({ url: COFFEE_URL, line: 5 }, aResponse => {
+      ok(!aResponse.error,
+        "Should be able to set a breakpoint in a coffee source file.");
+      ok(!aResponse.actualLocation,
+        "Should be able to set a breakpoint on line 5.");
+
+      deferred.resolve();
+    });
+  });
+
+  return deferred.promise;
+}
+
+function testSetBreakpointBlankLine() {
+  let deferred = promise.defer();
+
+  gDebugger.gThreadClient.setBreakpoint({ url: COFFEE_URL, line: 3 }, aResponse => {
+    ok(!aResponse.error,
+      "Should be able to set a breakpoint in a coffee source file on a blank line.");
+    ok(aResponse.actualLocation,
+      "Because 3 is empty, we should have an actualLocation.");
+    is(aResponse.actualLocation.url, COFFEE_URL,
+      "actualLocation.url should be source mapped to the coffee file.");
+    is(aResponse.actualLocation.line, 2,
+      "actualLocation.line should be source mapped back to 2.");
+
+    deferred.resolve();
+  });
+
+  return deferred.promise;
+}
+
+function testHitBreakpoint() {
+  let deferred = promise.defer();
+
+  gDebugger.gThreadClient.resume(aResponse => {
+    ok(!aResponse.error, "Shouldn't get an error resuming.");
+    is(aResponse.type, "resumed", "Type should be 'resumed'.");
+
+    gDebugger.gThreadClient.addOneTimeListener("paused", (aEvent, aPacket) => {
+      is(aPacket.type, "paused",
+        "We should now be paused again.");
+      is(aPacket.why.type, "breakpoint",
+        "and the reason we should be paused is because we hit a breakpoint.");
+
+      // Check that we stopped at the right place, by making sure that the
+      // environment is in the state that we expect.
+      is(aPacket.frame.environment.bindings.variables.start.value, 0,
+         "'start' is 0.");
+      is(aPacket.frame.environment.bindings.variables.stop.value.type, "undefined",
+         "'stop' hasn't been assigned to yet.");
+      is(aPacket.frame.environment.bindings.variables.pivot.value.type, "undefined",
+         "'pivot' hasn't been assigned to yet.");
+
+      waitForCaretUpdated(gPanel, 5).then(deferred.resolve);
+    });
+
+    // This will cause the breakpoint to be hit, and put us back in the
+    // paused state.
+    gDebuggee.binary_search([0, 2, 3, 5, 7, 10], 5);
+  });
+
+  return deferred.promise;
+}
+
+function testStepping() {
+  let deferred = promise.defer();
+
+  gDebugger.gThreadClient.stepIn(aResponse => {
+    ok(!aResponse.error, "Shouldn't get an error resuming.");
+    is(aResponse.type, "resumed", "Type should be 'resumed'.");
+
+    // After stepping, we will pause again, so listen for that.
+    gDebugger.gThreadClient.addOneTimeListener("paused", (aEvent, aPacket) => {
+      is(aPacket.type, "paused",
+        "We should now be paused again.");
+      is(aPacket.why.type, "resumeLimit",
+        "and the reason we should be paused is because we hit the resume limit.");
+
+      // Check that we stopped at the right place, by making sure that the
+      // environment is in the state that we expect.
+      is(aPacket.frame.environment.bindings.variables.start.value, 0,
+         "'start' is 0.");
+      is(aPacket.frame.environment.bindings.variables.stop.value, 5,
+         "'stop' hasn't been assigned to yet.");
+      is(aPacket.frame.environment.bindings.variables.pivot.value.type, "undefined",
+         "'pivot' hasn't been assigned to yet.");
+
+      waitForCaretUpdated(gPanel, 6).then(deferred.resolve);
+    });
+  });
+
+  return deferred.promise;
+}
+
+registerCleanupFunction(function() {
+  gTab = null;
+  gDebuggee = null;
+  gPanel = null;
+  gDebugger = null;
+  gEditor = null;
+  gSources = null;
+});