Add integration test for a non-worker extension

test/integration/internal-extension.js

@@ -0,0 +1,51 @@
+const test = require('tap').test;
+const Worker = require('tiny-worker');
+
+const dispatch = require('../../src/dispatch/central-dispatch');
+const VirtualMachine = require('../../src/virtual-machine');
+
+// By default Central Dispatch works with the Worker class built into the browser. Tell it to use TinyWorker instead.
+dispatch.workerClass = Worker;
+
+class TestInternalExtension {
+    constructor () {
+        this.status = {};
+        this.status.constructorCalled = true;
+    }
+
+    getInfo () {
+        this.status.getInfoCalled = true;
+        return {
+            id: 'test-internal-extension',
+            name: 'Test Internal Extension',
+            blocks: [
+                {
+                    opcode: 'go'
+                }
+            ]
+        };
+    }
+
+    go () {
+        this.status.goCalled = true;
+    }
+}
+
+test('internal extension', t => {
+    const vm = new VirtualMachine();
+
+    const extension = new TestInternalExtension();
+    t.ok(extension.status.constructorCalled);
+
+    t.notOk(extension.status.getInfoCalled);
+    return vm.extensionManager._registerInternalExtension(extension).then(() => {
+        t.ok(extension.status.getInfoCalled);
+
+        const func = vm.runtime.getOpcodeFunction('test-internal-extension.go');
+        t.type(func, 'function');
+
+        t.notOk(extension.status.goCalled);
+        func();
+        t.ok(extension.status.goCalled);
+    });
+});