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diff --git a/blockly/tests/generators/unittest.js b/blockly/tests/generators/unittest.js
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+++ b/blockly/tests/generators/unittest.js
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+/**
+ * @license
+ * Visual Blocks Language
+ *
+ * Copyright 2012 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Unit test blocks for Blockly.
+ * @author fraser@google.com (Neil Fraser)
+ */
+'use strict';
+
+Blockly.Blocks['unittest_main'] = {
+  // Container for unit tests.
+  init: function() {
+    this.setColour(65);
+    this.appendDummyInput()
+        .appendField('run tests');
+    this.appendStatementInput('DO');
+    this.setTooltip('Executes the enclosed unit tests,\n' +
+                    'then prints a summary.');
+  },
+  getVars: function() {
+    return ['unittestResults'];
+  }
+};
+
+Blockly.Blocks['unittest_assertequals'] = {
+  // Asserts that a value equals another value.
+  init: function() {
+    this.setColour(65);
+    this.setPreviousStatement(true);
+    this.setNextStatement(true);
+    this.appendValueInput('MESSAGE')
+        .appendField('name')
+        .setCheck('String');
+    this.appendValueInput('ACTUAL')
+        .appendField('actual');
+    this.appendValueInput('EXPECTED')
+        .appendField('expected');
+    this.setTooltip('Tests that "actual == expected".');
+  },
+  getVars: function() {
+    return ['unittestResults'];
+  }
+};
+
+Blockly.Blocks['unittest_assertvalue'] = {
+  // Asserts that a value is true, false, or null.
+  init: function() {
+    this.setColour(65);
+    this.setPreviousStatement(true);
+    this.setNextStatement(true);
+    this.appendValueInput('MESSAGE', 'test name')
+        .appendField('name')
+        .setCheck('String');
+    this.appendValueInput('ACTUAL')
+        .appendField('assert')
+        .appendField(new Blockly.FieldDropdown(
+        [['true', 'TRUE'], ['false', 'FALSE'], ['null', 'NULL']]), 'EXPECTED');
+    this.setTooltip('Tests that the value is true, false, or null.');
+  },
+  getVars: function() {
+    return ['unittestResults'];
+  }
+};
+
+Blockly.Blocks['unittest_fail'] = {
+  // Always assert an error.
+  init: function() {
+    this.setColour(65);
+    this.setPreviousStatement(true);
+    this.setNextStatement(true);
+    this.appendDummyInput()
+        .appendField(new Blockly.FieldTextInput('test name'), 'MESSAGE')
+        .appendField('fail');
+    this.setTooltip('Records an error.');
+  },
+  getVars: function() {
+    return ['unittestResults'];
+  }
+};
+
+Blockly.Blocks['unittest_adjustindex'] = {
+  // Adjusts the indexing based on current setting.
+  init: function() {
+    this.jsonInit({
+      "message0": "adjusted %1",
+      "args0": [
+        {
+          "type": "input_value",
+          "name": "INDEX",
+          "check": "Number"
+        }
+      ],
+      "inputsInline": true,
+      "output": "Number",
+      "colour": 65,
+      "tooltip": "Adjusts the value based on whether generated code is using " +
+          "zero or one based indexing"
+    });
+  }
+};