diff -r 000000000000 -r 6474c204b198 browser/devtools/styleeditor/test/browser_styleeditor_cmd_edit.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/styleeditor/test/browser_styleeditor_cmd_edit.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,206 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that the edit command works
+
+const TEST_URI = "http://example.com/browser/browser/devtools/styleeditor/" +
+                 "test/browser_styleeditor_cmd_edit.html";
+
+function test() {
+  return Task.spawn(spawnTest).then(finish, helpers.handleError);
+}
+
+function spawnTest() {
+  let options = yield helpers.openTab(TEST_URI);
+  yield helpers.openToolbar(options);
+
+  yield helpers.audit(options, [
+    {
+      setup: "edit",
+      check: {
+        input:  'edit',
+        hints:      ' <resource> [line]',
+        markup: 'VVVV',
+        status: 'ERROR',
+        args: {
+          resource: { status: 'INCOMPLETE' },
+          line: { status: 'VALID' },
+        }
+      },
+    },
+    {
+      setup: "edit i",
+      check: {
+        input:  'edit i',
+        hints:        'nline-css [line]',
+        markup: 'VVVVVI',
+        status: 'ERROR',
+        args: {
+          resource: { arg: ' i', status: 'INCOMPLETE' },
+          line: { status: 'VALID' },
+        }
+      },
+    },
+    {
+      setup: "edit c",
+      check: {
+        input:  'edit c',
+        hints:        'ss#style2 [line]',
+        markup: 'VVVVVI',
+        status: 'ERROR',
+        args: {
+          resource: { arg: ' c', status: 'INCOMPLETE' },
+          line: { status: 'VALID' },
+        }
+      },
+    },
+    {
+      setup: "edit http",
+      check: {
+        input:  'edit http',
+        hints:           '://example.com/browser/browser/devtools/styleeditor/test/resources_inpage1.css [line]',
+        markup: 'VVVVVIIII',
+        status: 'ERROR',
+        args: {
+          resource: {
+            arg: ' http',
+            status: 'INCOMPLETE',
+            message: 'Value required for \'resource\'.'
+          },
+          line: { status: 'VALID' },
+        }
+      },
+    },
+    {
+      setup: "edit page1",
+      check: {
+        input:  'edit page1',
+        hints:            ' [line] -> http://example.com/browser/browser/devtools/styleeditor/test/resources_inpage1.css',
+        markup: 'VVVVVIIIII',
+        status: 'ERROR',
+        args: {
+          resource: {
+            arg: ' page1',
+            status: 'INCOMPLETE',
+            message: 'Value required for \'resource\'.'
+          },
+          line: { status: 'VALID' },
+        }
+      },
+    },
+    {
+      setup: "edit page2",
+      check: {
+        input:  'edit page2',
+        hints:            ' [line] -> http://example.com/browser/browser/devtools/styleeditor/test/resources_inpage2.css',
+        markup: 'VVVVVIIIII',
+        status: 'ERROR',
+        args: {
+          resource: {
+            arg: ' page2',
+            status: 'INCOMPLETE',
+            message: 'Value required for \'resource\'.'
+          },
+          line: { status: 'VALID' },
+        }
+      },
+    },
+    {
+      setup: "edit stylez",
+      check: {
+        input:  'edit stylez',
+        hints:             ' [line]',
+        markup: 'VVVVVEEEEEE',
+        status: 'ERROR',
+        args: {
+          resource: { arg: ' stylez', status: 'ERROR', message: 'Can\'t use \'stylez\'.' },
+          line: { status: 'VALID' },
+        }
+      },
+    },
+    {
+      setup: "edit css#style2",
+      check: {
+        input:  'edit css#style2',
+        hints:                 ' [line]',
+        markup: 'VVVVVVVVVVVVVVV',
+        status: 'VALID',
+        args: {
+          resource: { arg: ' css#style2', status: 'VALID', message: '' },
+          line: { status: 'VALID' },
+        }
+      },
+    },
+    {
+      setup: "edit css#style2 5",
+      check: {
+        input:  'edit css#style2 5',
+        hints:                   '',
+        markup: 'VVVVVVVVVVVVVVVVV',
+        status: 'VALID',
+        args: {
+          resource: { arg: ' css#style2', status: 'VALID', message: '' },
+          line: { value: 5, arg: ' 5', status: 'VALID' },
+        }
+      },
+    },
+    {
+      setup: "edit css#style2 0",
+      check: {
+        input:  'edit css#style2 0',
+        hints:                   '',
+        markup: 'VVVVVVVVVVVVVVVVE',
+        status: 'ERROR',
+        args: {
+          resource: { arg: ' css#style2', status: 'VALID', message: '' },
+          line: { arg: ' 0', status: 'ERROR', message: '0 is smaller than minimum allowed: 1.' },
+        }
+      },
+    },
+    {
+      setup: "edit css#style2 -1",
+      check: {
+        input:  'edit css#style2 -1',
+        hints:                    '',
+        markup: 'VVVVVVVVVVVVVVVVEE',
+        status: 'ERROR',
+        args: {
+          resource: { arg: ' css#style2', status: 'VALID', message: '' },
+          line: { arg: ' -1', status: 'ERROR', message: '-1 is smaller than minimum allowed: 1.' },
+        }
+      },
+    }
+  ]);
+
+  let toolbox = gDevTools.getToolbox(options.target);
+  ok(toolbox == null, 'toolbox is closed');
+
+  yield helpers.audit(options, [
+    {
+      setup: "edit css#style2",
+      check: {
+        input: "edit css#style2",
+        args: {
+          resource: {
+            value: function(resource) {
+              let style2 = options.window.document.getElementById("style2");
+              return resource.element.ownerNode == style2;
+            }
+          }
+        }
+      },
+      exec: { output: "" }
+    },
+  ]);
+
+  let toolbox = gDevTools.getToolbox(options.target);
+  ok(toolbox != null, "toolbox is open");
+
+  let styleEditor = toolbox.getCurrentPanel();
+  ok(typeof styleEditor.selectStyleSheet === "function", "styleeditor is open");
+
+  yield toolbox.destroy();
+
+  yield helpers.closeToolbar(options);
+  yield helpers.closeTab(options);
+}