Turbopack: improve unit tests (#80940)

Author: mischnic

turbopack/crates/turbopack-tests/tests/execution/turbopack/side-effects-optimization/comptime/input/index.js

@@ -1,10 +1,31 @@
 import { something } from 'package/dep.js'
 import { something2 } from 'package/dep2.js'
+import { something3 } from 'package-directive/dep.js'
 
 it('should not include a module that is side effect free and exports are not used due to static analysis', () => {
+  const modules = Object.keys(__turbopack_modules__)
+  expect(modules).toContainEqual(
+    expect.stringMatching(/input\/node_modules\/package\/dep2\.js/)
+  )
+  expect(modules).not.toContainEqual(
+    expect.stringMatching(/input\/node_modules\/package\/dep\.js/)
+  )
+
   if (true) {
     something2()
     return
   }
   something()
 })
+
+it('should not include a module that is side effect free via directive and exports are not used due to static analysis', () => {
+  const modules = Object.keys(__turbopack_modules__)
+  expect(modules).not.toContainEqual(
+    expect.stringMatching(/input\/node_modules\/package-directive\/dep\.js/)
+  )
+
+  if (true) {
+  } else {
+    something3()
+  }
+})

turbopack/crates/turbopack-tests/tests/execution/turbopack/side-effects-optimization/comptime/input/node_modules/package-directive/dep.js

@@ -1,3 +1,4 @@
 {
-  "treeShakingMode": "reexports-only"
+  "treeShakingMode": "reexports-only",
+  "scopeHoisting": false
 }