Add skip test

npm/index.js

@@ -32,6 +32,8 @@ void async function main() {
   }
 }()
 
+const skip = Symbol('skip')
+
 async function runTransforms(json, args) {
   const process = await import('node:process')
   let i, code, output = json
@@ -137,8 +139,6 @@ async function transform(json, code) {
   }
 }
 
-const skip = Symbol('skip')
-
 async function readStdinGenerator() {
   const fs = await import('node:fs')
   const {Buffer} = await import('node:buffer')

npm/test.js

@@ -120,6 +120,11 @@ void async function main() {
     t.deepEqual(JSON.parse(stdout), [1, 2, 3])
   })
 
+  await test('transform - skip', async t => {
+    const {stdout} = await run(42, `skip`)
+    t.equal(stdout, '')
+  })
+
   await test('transform - invalid code argument', async t => {
     const json = {foo: 'bar'}
     const code = '".foo.toUpperCase("'