diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_debugger-statement.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_debugger-statement.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,89 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests the behavior of the debugger statement.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_inline-debugger-statement.html";
+
+let gClient;
+
+function test() {
+  if (!DebuggerServer.initialized) {
+    DebuggerServer.init(() => true);
+    DebuggerServer.addBrowserActors();
+  }
+
+  let transport = DebuggerServer.connectPipe();
+  gClient = new DebuggerClient(transport);
+  gClient.connect((aType, aTraits) => {
+    is(aType, "browser",
+      "Root actor should identify itself as a browser.");
+
+    addTab(TAB_URL)
+      .then(() => attachTabActorForUrl(gClient, TAB_URL))
+      .then(testEarlyDebuggerStatement)
+      .then(testDebuggerStatement)
+      .then(closeConnection)
+      .then(finish)
+      .then(null, aError => {
+        ok(false, "Got an error: " + aError.message + "\n" + aError.stack);
+      });
+  });
+}
+
+function testEarlyDebuggerStatement([aGrip, aResponse]) {
+  let deferred = promise.defer();
+
+  let onPaused = function(aEvent, aPacket) {
+    ok(false, "Pause shouldn't be called before we've attached!");
+    deferred.reject();
+  };
+
+  gClient.addListener("paused", onPaused);
+
+  // This should continue without nesting an event loop and calling
+  // the onPaused hook, because we haven't attached yet.
+  let debuggee = gBrowser.selectedTab.linkedBrowser.contentWindow.wrappedJSObject;
+  debuggee.runDebuggerStatement();
+
+  gClient.removeListener("paused", onPaused);
+
+  // Now attach and resume...
+  gClient.request({ to: aResponse.threadActor, type: "attach" }, () => {
+    gClient.request({ to: aResponse.threadActor, type: "resume" }, () => {
+      ok(true, "Pause wasn't called before we've attached.");
+      deferred.resolve([aGrip, aResponse]);
+    });
+  });
+
+  return deferred.promise;
+}
+
+function testDebuggerStatement([aGrip, aResponse]) {
+  let deferred = promise.defer();
+
+  gClient.addListener("paused", (aEvent, aPacket) => {
+    gClient.request({ to: aResponse.threadActor, type: "resume" }, () => {
+      ok(true, "The pause handler was triggered on a debugger statement.");
+      deferred.resolve();
+    });
+  });
+
+  // Reach around the debugging protocol and execute the debugger statement.
+  let debuggee = gBrowser.selectedTab.linkedBrowser.contentWindow.wrappedJSObject;
+  debuggee.runDebuggerStatement();
+}
+
+function closeConnection() {
+  let deferred = promise.defer();
+  gClient.close(deferred.resolve);
+  return deferred.promise;
+}
+
+registerCleanupFunction(function() {
+  removeTab(gBrowser.selectedTab);
+  gClient = null;
+});
+