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gaia/apps/system/test/unit/debugging_icon_test.js

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+/* global DebuggingIcon */
+'use strict';
+
+requireApp('system/js/service.js');
+requireApp('system/js/base_ui.js');
+requireApp('system/js/base_icon.js');
+requireApp('system/js/debugging_icon.js');
+
+suite('system/DebuggingIcon', function() {
+  var subject, manager;
+
+  setup(function() {
+    manager = {
+      enabled: false
+    };
+    subject = new DebuggingIcon(manager);
+    subject.start();
+    subject.element = document.createElement('div');
+  });
+
+  teardown(function() {
+    subject.stop();
+  });
+
+  test('Debugging is enabled', function() {
+    manager.enabled = true;
+    subject.update();
+    assert.isTrue(subject.isVisible());
+  });
+
+  test('Debugging is disabled', function() {
+    manager.enabled = false;
+    subject.update();
+    assert.isFalse(subject.isVisible());
+  });
+});