Fix incomplete activity mock in GraphicsBlocks.test.js

Author: gourijain026@gmail.com

js/blocks/__tests__/GraphicsBlocks.test.js

@@ -42,7 +42,7 @@ global.ValueBlock = class {
     }
 };
 
-global.FlowBlock = class extends global.ValueBlock {};
+global.FlowBlock = class extends global.ValueBlock { };
 global.FlowClampBlock = class extends global.FlowBlock {
     makeMacro = jest.fn();
 };
@@ -80,7 +80,11 @@ describe("GraphicsBlocks", () => {
         };
 
         activity = {
-            blocks: {},
+            blocks: {
+                blockList: {
+                    0: { connections: [null] }
+                }
+            },
             errorMsg: jest.fn(),
             turtles: {
                 companionTurtle: jest.fn(() => 0),