test: smoke-test the built VS Code extension bundle

packages/hdrify-vscode-extension/src/extensionBundle.test.ts

@@ -0,0 +1,34 @@
+import Module, { createRequire } from 'node:module';
+import path from 'node:path';
+import { expect, it } from 'vitest';
+
+// Loads the built bundle (what ships), not the TS source, so packaging/interop
+// breakage like `x_1.default is not a function` fails here instead of in users' editors.
+// Requires `pnpm build` first (CI runs it before `pnpm test`).
+type Loader = { _load: (...args: unknown[]) => unknown };
+const loader = Module as unknown as Loader;
+
+// Any property is a callable stub returning another stub: enough for activate() to run.
+const stub = (): object =>
+  new Proxy(function () {}, { get: (_t, key) => (key === 'then' ? undefined : stub()), apply: stub, construct: stub });
+// esbuild's interop copies own keys of the required module, so the namespaces must be real properties.
+const vscodeStub = Object.fromEntries(
+  ['window', 'workspace', 'commands', 'env', 'Uri', 'ProgressLocation', 'ViewColumn', 'Disposable', 'EventEmitter'].map(
+    (k) => [k, stub()],
+  ),
+);
+
+it('built extension bundle loads and activates', () => {
+  const load = loader._load;
+  loader._load = function (this: unknown, request: unknown, ...rest: unknown[]) {
+    return request === 'vscode' ? vscodeStub : load.call(this, request, ...rest);
+  };
+  try {
+    const bundle = createRequire(__filename)(path.resolve(__dirname, '../dist/extension.js'));
+    const context = { subscriptions: [] as unknown[], extensionUri: stub(), extensionPath: '' };
+    expect(() => bundle.activate(context)).not.toThrow();
+    expect(context.subscriptions.length).toBeGreaterThan(0);
+  } finally {
+    loader._load = load;
+  }
+});

vitest.config.ts

@@ -8,6 +8,7 @@ export default defineConfig({
       'packages/hdrify/src/**/*.test.ts',
       'packages/hdrify-tests/src/**/*.test.ts',
       'packages/cli-tests/src/**/*.test.ts',
+      'packages/hdrify-vscode-extension/src/**/*.test.ts',
     ],
     environment: 'node',
     watch: false,