Add test for side effects directive

Author: mischnic

Diff for: turbopack/crates/turbopack-tests/tests/execution/turbopack/side-effects-optimization/directive/input/index.js

@@ -0,0 +1,10 @@
+import { foo } from './lib/index.js'
+
+it('should respect side effects directive', () => {
+  expect(foo).toBe(789)
+
+  const modules = Object.keys(__turbopack_modules__)
+  expect(modules).toContainEqual(expect.stringContaining('input/lib/foo'))
+  expect(modules).not.toContainEqual(expect.stringContaining('input/lib/index'))
+  expect(modules).not.toContainEqual(expect.stringContaining('input/lib/bar'))
+})

Diff for: turbopack/crates/turbopack-tests/tests/execution/turbopack/side-effects-optimization/directive/input/lib/bar.js

@@ -0,0 +1,3 @@
+"use turbopack no side effects"
+
+export const bar = 123;

Diff for: turbopack/crates/turbopack-tests/tests/execution/turbopack/side-effects-optimization/directive/input/lib/foo.js

@@ -0,0 +1,3 @@
+"use turbopack no side effects"
+
+export const foo = 789;

Diff for: turbopack/crates/turbopack-tests/tests/execution/turbopack/side-effects-optimization/directive/input/lib/index.js

@@ -0,0 +1,4 @@
+"use turbopack no side effects"
+
+export {foo} from "./foo";
+export {bar} from "./bar";

Diff for: turbopack/crates/turbopack-tests/tests/execution/turbopack/side-effects-optimization/directive/options.json

@@ -0,0 +1,3 @@
+{
+  "treeShakingMode": "reexports-only"
+}