diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_cmd-break.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_cmd-break.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,200 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests that the break commands works as they should.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_cmd-break.html";
+
+function test() {
+  let gPanel, gDebugger, gThreadClient;
+  let gLineNumber;
+
+  helpers.addTabWithToolbar(TAB_URL, aOptions => {
+    return helpers.audit(aOptions, [
+      {
+        setup: 'break',
+        check: {
+          input:  'break',
+          hints:       ' add line',
+          markup: 'IIIII',
+          status: 'ERROR',
+        }
+      },
+      {
+        setup: 'break add',
+        check: {
+          input:  'break add',
+          hints:           ' line',
+          markup: 'IIIIIVIII',
+          status: 'ERROR'
+        }
+      },
+      {
+        setup: 'break add line',
+        check: {
+          input:  'break add line',
+          hints:                ' <file> <line>',
+          markup: 'VVVVVVVVVVVVVV',
+          status: 'ERROR'
+        }
+      },
+      {
+        name: 'open toolbox',
+        setup: function() {
+          return initDebugger(gBrowser.selectedTab).then(([aTab, aDebuggee, aPanel]) => {
+            // Spin the event loop before causing the debuggee to pause, to allow
+            // this function to return first.
+            executeSoon(() => aDebuggee.firstCall());
+
+            return waitForSourceAndCaretAndScopes(aPanel, ".html", 1).then(() => {
+              gPanel = aPanel;
+              gDebugger = gPanel.panelWin;
+              gThreadClient = gPanel.panelWin.gThreadClient;
+              gLineNumber = '' + aOptions.window.wrappedJSObject.gLineNumber;
+            });
+          });
+        },
+        post: function() {
+          ok(gThreadClient, "Debugger client exists.");
+          is(gLineNumber, 1, "gLineNumber is correct.");
+        },
+      },
+      {
+        name: 'break add line .../doc_cmd-break.html 14',
+        setup: function() {
+          // We have to setup in a function to allow gLineNumber to be initialized.
+          let line = 'break add line ' + TAB_URL + ' ' + gLineNumber;
+          return helpers.setInput(aOptions, line);
+        },
+        check: {
+          hints: '',
+          status: 'VALID',
+          message: '',
+          args: {
+            file: { value: TAB_URL, message: '' },
+            line: { value: 1 }
+          }
+        },
+        exec: {
+          output: 'Added breakpoint'
+        }
+      },
+      {
+        setup: 'break add line ' + TAB_URL + ' 17',
+        check: {
+          hints: '',
+          status: 'VALID',
+          message: '',
+          args: {
+            file: { value: TAB_URL, message: '' },
+            line: { value: 17 }
+          }
+        },
+        exec: {
+          output: 'Added breakpoint'
+        }
+      },
+      {
+        setup: 'break list',
+        check: {
+          input:  'break list',
+          hints:            '',
+          markup: 'VVVVVVVVVV',
+          status: 'VALID'
+        },
+        exec: {
+          output: [
+            /Source/, /Remove/,
+            /doc_cmd-break\.html:1/,
+            /doc_cmd-break\.html:1/
+          ]
+        }
+      },
+      {
+        name: 'cleanup',
+        setup: function() {
+          let deferred = promise.defer();
+          gThreadClient.resume(deferred.resolve);
+          return deferred.promise;
+        }
+      },
+      {
+        setup: 'break del 1',
+        check: {
+          input:  'break del 1',
+          hints:              ' -> doc_cmd-break.html:1',
+          markup: 'VVVVVVVVVVI',
+          status: 'ERROR',
+          args: {
+            breakpoint: {
+              status: 'INCOMPLETE',
+              message: 'Value required for \'breakpoint\'.'
+            }
+          }
+        }
+      },
+      {
+        setup: 'break del doc_cmd-break.html:1',
+        check: {
+          input:  'break del doc_cmd-break.html:1',
+          hints:                                 '',
+          markup: 'VVVVVVVVVVVVVVVVVVVVVVVVVVVVVV',
+          status: 'VALID',
+          args: {
+            breakpoint: { arg: ' doc_cmd-break.html:1' },
+          }
+        },
+        exec: {
+          output: 'Breakpoint removed'
+        }
+      },
+      {
+        setup: 'break list',
+        check: {
+          input:  'break list',
+          hints:            '',
+          markup: 'VVVVVVVVVV',
+          status: 'VALID'
+        },
+        exec: {
+          output: [
+            /Source/, /Remove/,
+            /doc_cmd-break\.html:17/
+          ]
+        }
+      },
+      {
+        setup: 'break del doc_cmd-break.html:17',
+        check: {
+          input:  'break del doc_cmd-break.html:17',
+          hints:                                 '',
+          markup: 'VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV',
+          status: 'VALID',
+          args: {
+            breakpoint: { arg: ' doc_cmd-break.html:17' },
+          }
+        },
+        exec: {
+          output: 'Breakpoint removed'
+        }
+      },
+      {
+        setup: 'break list',
+        check: {
+          input:  'break list',
+          hints:            '',
+          markup: 'VVVVVVVVVV',
+          status: 'VALID'
+        },
+        exec: {
+          output: 'No breakpoints set'
+        },
+        post: function() {
+          return teardown(gPanel, { noTabRemoval: true });
+        }
+      },
+    ]);
+  }).then(finish);
+}