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/unit/tw_extension_manager.js

@@ -0,0 +1,80 @@
+const {test} = require('tap');
+const ExtensionManager = require('../../src/extension-support/extension-manager');
+const VM = require('../../src/virtual-machine');
+
+test('isBuiltinExtension', t => {
+    const fakeRuntime = {};
+    const manager = new ExtensionManager(fakeRuntime);
+    t.equal(manager.isBuiltinExtension('pen'), true);
+    t.equal(manager.isBuiltinExtension('lksdfjlskdf'), false);
+    t.end();
+});
+
+test('_isValidExtensionURL', t => {
+    const fakeRuntime = {};
+    const manager = new ExtensionManager(fakeRuntime);
+    t.equal(manager._isValidExtensionURL('fetch'), false);
+    t.equal(manager._isValidExtensionURL(''), false);
+    t.equal(manager._isValidExtensionURL('extensions.turbowarp.org/fetch.js'), false);
+    t.equal(manager._isValidExtensionURL('https://extensions.turbowarp.org/fetch.js'), true);
+    t.equal(manager._isValidExtensionURL('http://extensions.turbowarp.org/fetch.js'), true);
+    t.equal(manager._isValidExtensionURL('http://localhost:8000'), true);
+    t.equal(manager._isValidExtensionURL('data:application/javascript;base64,YWxlcnQoMSk='), true);
+    t.equal(manager._isValidExtensionURL('file:///home/test/extension.js'), true);
+    t.end();
+});
+
+test('loadExtensionURL, getExtensionURLs, deduplication', async t => {
+    const vm = new VM();
+
+    let loadedExtensions = 0;
+    vm.extensionManager.securityManager.getSandboxMode = () => 'unsandboxed';
+    global.document = {
+        createElement: () => {
+            loadedExtensions++;
+            const element = {};
+            setTimeout(() => {
+                global.Scratch.extensions.register({
+                    getInfo: () => ({
+                        id: `extension${loadedExtensions}`
+                    })
+                });
+            });
+            return element;
+        },
+        body: {
+            appendChild: () => {}
+        }
+    };
+
+    const url1 = 'https://turbowarp.org/1.js';
+    t.equal(vm.extensionManager.isExtensionURLLoaded(url1), false);
+    t.same(vm.extensionManager.getExtensionURLs(), {});
+    await vm.extensionManager.loadExtensionURL(url1);
+    t.equal(vm.extensionManager.isExtensionURLLoaded(url1), true);
+    t.equal(loadedExtensions, 1);
+    t.same(vm.extensionManager.getExtensionURLs(), {
+        extension1: url1
+    });
+
+    // Loading the extension again should do nothing.
+    await vm.extensionManager.loadExtensionURL(url1);
+    t.equal(vm.extensionManager.isExtensionURLLoaded(url1), true);
+    t.equal(loadedExtensions, 1);
+    t.same(vm.extensionManager.getExtensionURLs(), {
+        extension1: url1
+    });
+
+    // Loading another extension should work
+    const url2 = 'https://turbowarp.org/2.js';
+    t.equal(vm.extensionManager.isExtensionURLLoaded(url2), false);
+    await vm.extensionManager.loadExtensionURL(url2);
+    t.equal(vm.extensionManager.isExtensionURLLoaded(url2), true);
+    t.equal(loadedExtensions, 2);
+    t.same(vm.extensionManager.getExtensionURLs(), {
+        extension1: url1,
+        extension2: url2
+    });
+
+    t.end();
+});