Initial commit of 001code-html Scratch frontend project.

Includes scratch-gui, scratch-vm, scratch-blocks, scratch-render, scratch-l10n, and deployment config.

Co-authored-by: Cursor <cursoragent@cursor.com>

scratch-vm/test/integration/unknown-opcode-as-reporter-block.js

@@ -0,0 +1,54 @@
+const path = require('path');
+const test = require('tap').test;
+const makeTestStorage = require('../fixtures/make-test-storage');
+const readFileToBuffer = require('../fixtures/readProjectFile').readFileToBuffer;
+const VirtualMachine = require('../../src/index');
+
+const uri = path.resolve(__dirname, '../fixtures/unknown-opcode-as-reporter-block.sb2');
+const project = readFileToBuffer(uri);
+
+test('unknown opcode', t => {
+    const vm = new VirtualMachine();
+    vm.attachStorage(makeTestStorage());
+
+    vm.start();
+    vm.clear();
+    vm.setCompatibilityMode(false);
+    vm.setTurboMode(false);
+    vm.loadProject(project).then(() => {
+        vm.greenFlag();
+
+        // The project has 4 blocks in a single stack:
+        //      when green flag
+        //      if "unknown block"
+        //      set volume to "unknown block"
+        //      play sound "unknown block"
+        // the "unknown block" has unknown opcode and was created by
+        // dragging a discontinued extension.
+        // It should be parsed in without error and a shadow block
+        // should be created where appropriate.
+        const blocks = vm.runtime.targets[0].blocks;
+        const topBlockId = blocks.getScripts()[0];
+        const secondBlockId = blocks.getNextBlock(topBlockId);
+        const thirdBlockId = blocks.getNextBlock(secondBlockId);
+        const fourthBlockId = blocks.getNextBlock(thirdBlockId);
+
+        t.equal(blocks.getBlock(topBlockId).opcode, 'event_whenflagclicked');
+        t.equal(blocks.getBlock(secondBlockId).opcode, 'control_wait_until');
+        t.equal(blocks.getBlock(thirdBlockId).opcode, 'sound_setvolumeto');
+        t.equal(blocks.getBlock(fourthBlockId).opcode, 'sound_play');
+
+        const secondBlockInputId = blocks.getBlock(secondBlockId).inputs.CONDITION.block;
+        const thirdBlockInputId = blocks.getBlock(thirdBlockId).inputs.VOLUME.block;
+        const fourthBlockInputId = blocks.getBlock(fourthBlockId).inputs.SOUND_MENU.block;
+
+        t.equal(secondBlockInputId, null);
+        t.true(blocks.getBlock(thirdBlockInputId).shadow);
+        t.equal(blocks.getBlock(thirdBlockInputId).opcode, 'math_number');
+        t.true(blocks.getBlock(fourthBlockInputId).shadow);
+        t.equal(blocks.getBlock(fourthBlockInputId).opcode, 'sound_sounds_menu');
+
+        vm.quit();
+        t.end();
+    });
+});