Adding new test block for dynamic dropdown (#493)

* Adding new test block for dynamic dropdown

* Change options

* update

* Add block to toolbox category

* Add fix

plugins/block-test/src/fields/dropdowns.js

@@ -418,6 +418,35 @@ Blockly.Blocks['test_dropdowns_dynamic_random'] = {
   },
 };
 
+Blockly.Blocks['test_dropdowns_dynamic_connect_dependant'] = {
+  init: function() {
+    const dropdown = new Blockly.FieldDropdown(this.dynamicOptions);
+    this.appendDummyInput()
+        .appendField('dynamic connect-dependant')
+        .appendField(dropdown, 'OPTIONS');
+    this.setNextStatement(true);
+    this.setPreviousStatement(true);
+  },
+
+  dynamicOptions: function() {
+    if (this.sourceBlock_ && this.sourceBlock_.getSurroundParent()) {
+      const parent = this.sourceBlock_.getSurroundParent();
+      const options = [
+        ['connected', 'CONNECTED_KEY'],
+        [`surroundParent: ${parent.type}`, `${parent.id}_type_key`],
+        [`surroundParent: ${parent.id}`, `${parent.id}_key`]];
+      const top = this.sourceBlock_.getTopStackBlock();
+      if (top.id !== parent.id) {
+        options.push([`topStack: ${top.type}`, `${top.id}_type_key`]);
+        options.push([`topStack: ${top.id}`, `${top.id}_key`]);
+      }
+      return options;
+    } else {
+      return [['unconnected', 'UNCONNECTED_KEY']];
+    }
+  },
+};
+
 /**
  * Mutator methods added to the test_dropdowns_in_mutator block.
  * @mixin
@@ -515,6 +544,10 @@ export const category = {
       'kind': 'BLOCK',
       'type': 'test_dropdowns_dynamic_random',
     },
+    {
+      'kind': 'BLOCK',
+      'type': 'test_dropdowns_dynamic_connect_dependant',
+    },
     {
       'kind': 'LABEL',
       'text': 'Other',

plugins/block-test/test/index.js

@@ -11,7 +11,8 @@
 import * as Blockly from 'blockly';
 import {createPlayground, toolboxCategories,
   toolboxSimple} from '@blockly/dev-tools';
-import {toolbox, onInit} from '../src/index';
+import {toolboxTestBlocks as toolbox,
+  toolboxTestBlocksInit as onInit} from '../src/index';
 
 
 /**