Add isEditable to field, and add tests

tests/jsunit/field_test.js

@@ -0,0 +1,77 @@
+/**
+ * @license
+ * Visual Blocks Editor
+ *
+ * Copyright 2017 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 Tests for Blockly.Field
+ * @author fenichel@google.com (Rachel Fenichel)
+ */
+'use strict';
+
+function test_field_iseditable() {
+  var field = new Blockly.Field("Dummy text");
+  // EDITABLE is true by default, but without a source block a field can't be
+  // edited.
+  assertFalse('Field without a block is not editable', field.isEditable());
+
+  // Setting EDITABLE to false doesn't matter.
+  field = new Blockly.Field("Dummy text");
+  field.EDITABLE = false;
+  assertFalse('Field without a block is not editable', field.isEditable());
+
+  // Tests with an editable source block.
+  var editableBlock = {
+    isEditable: function() {
+      return true;
+    }
+  };
+
+  field = new Blockly.Field("Dummy text");
+  field.sourceBlock_ = editableBlock;
+
+  assertTrue('Editable field with editable block is editable',
+      field.isEditable());
+
+  field = new Blockly.Field("Dummy text");
+  field.sourceBlock_ = editableBlock;
+  field.EDITABLE = false;
+
+  assertFalse('Non-editable field with editable block is not editable',
+      field.isEditable());
+
+  // Tests with a non-editable source block.
+  var nonEditableBlock = {
+    isEditable: function() {
+      return false;
+    }
+  };
+
+  field = new Blockly.Field("Dummy text");
+  field.sourceBlock_ = nonEditableBlock;
+
+  assertFalse('Editable field with non-editable block is not editable',
+      field.isEditable());
+
+  field = new Blockly.Field("Dummy text");
+  field.sourceBlock_ = nonEditableBlock;
+  field.EDITABLE = false;
+
+  assertFalse('Non-editable field with non-editable block is not editable',
+      field.isEditable());
+}

tests/jsunit/index.html

@@ -11,6 +11,7 @@
     <script src="connection_test.js"></script>
     <script src="connection_db_test.js"></script>
     <script src="extensions_test.js"></script>
+    <script src="field_test.js"></script>
     <script src="field_angle_test.js"></script>
     <script src="field_number_test.js"></script>
     <script src="generator_test.js"></script>