diff -r 000000000000 -r 6474c204b198 browser/devtools/inspector/test/browser_inspector_cmd_inspect.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/inspector/test/browser_inspector_cmd_inspect.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,133 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that the inspect command works as it should
+
+const TEST_URI = "http://example.com/browser/browser/devtools/inspector/" +
+                 "test/browser_inspector_cmd_inspect.html";
+
+function test() {
+  helpers.addTabWithToolbar(TEST_URI, function(options) {
+    return helpers.audit(options, [
+      {
+        setup: "inspect",
+        check: {
+          input:  'inspect',
+          hints:         ' <selector>',
+          markup: 'VVVVVVV',
+          status: 'ERROR',
+          args: {
+            selector: {
+              message: 'Value required for \'selector\'.'
+            },
+          }
+        },
+      },
+      {
+        setup: "inspect h1",
+        check: {
+          input:  'inspect h1',
+          hints:            '',
+          markup: 'VVVVVVVVII',
+          status: 'ERROR',
+          args: {
+            selector: { message: 'No matches' },
+          }
+        },
+      },
+      {
+        setup: "inspect span",
+        check: {
+          input:  'inspect span',
+          hints:              '',
+          markup: 'VVVVVVVVEEEE',
+          status: 'ERROR',
+          args: {
+            selector: { message: 'Too many matches (2)' },
+          }
+        },
+      },
+      {
+        setup: "inspect div",
+        check: {
+          input:  'inspect div',
+          hints:             '',
+          markup: 'VVVVVVVVVVV',
+          status: 'VALID',
+          args: {
+            selector: { message: '' },
+          }
+        },
+      },
+      {
+        setup: "inspect .someclas",
+        check: {
+          input:  'inspect .someclas',
+          hints:                   '',
+          markup: 'VVVVVVVVIIIIIIIII',
+          status: 'ERROR',
+          args: {
+            selector: { message: 'No matches' },
+          }
+        },
+      },
+      {
+        setup: "inspect .someclass",
+        check: {
+          input:  'inspect .someclass',
+          hints:                    '',
+          markup: 'VVVVVVVVVVVVVVVVVV',
+          status: 'VALID',
+          args: {
+            selector: { message: '' },
+          }
+        },
+      },
+      {
+        setup: "inspect #someid",
+        check: {
+          input:  'inspect #someid',
+          hints:                 '',
+          markup: 'VVVVVVVVVVVVVVV',
+          status: 'VALID',
+          args: {
+            selector: { message: '' },
+          }
+        },
+      },
+      {
+        setup: "inspect button[disabled]",
+        check: {
+          input:  'inspect button[disabled]',
+          hints:                          '',
+          markup: 'VVVVVVVVVVVVVVVVVVVVVVVV',
+          status: 'VALID',
+          args: {
+            selector: { message: '' },
+          }
+        },
+      },
+      {
+        setup: "inspect p>strong",
+        check: {
+          input:  'inspect p>strong',
+          hints:                  '',
+          markup: 'VVVVVVVVVVVVVVVV',
+          status: 'VALID',
+          args: {
+            selector: { message: '' },
+          }
+        },
+      },
+      {
+        setup: "inspect :root",
+        check: {
+          input:  'inspect :root',
+          hints:               '',
+          markup: 'VVVVVVVVVVVVV',
+          status: 'VALID'
+        },
+      },
+    ]);
+  }).then(finish);
+}