Add test for reading pkg.files

Author: ai

process-dir.js

@@ -178,14 +178,11 @@ async function process (dir) {
   let pattern = '**/*.js'
 
   let pkgPath = join(dir, 'package.json')
-  let pkgFile = {}
-
   if (fs.existsSync(pkgPath)) {
-    pkgFile = JSON.parse(await readFile(pkgPath))
-  }
-
-  if ('files' in pkgFile) {
-    pattern = pkgFile.files
+    let pkg = JSON.parse(await readFile(pkgPath))
+    if (pkg.files) {
+      pattern = pkg.files
+    }
   }
 
   let all = await globby(pattern, { ignore, cwd: dir })

test/fixtures/files/a/file.js

@@ -0,0 +1,5 @@
+function a () {
+  console.log('cjs a')
+}
+
+module.exports = { a, toShare }

test/fixtures/files/a/index.js

@@ -0,0 +1 @@
+const { a } = require('./a')

test/fixtures/files/file.js

@@ -0,0 +1,8 @@
+{
+  "name": "files",
+  "version": "0.0.0",
+  "files": [
+    "index.js",
+    "a/index.js"
+  ]
+}

test/fixtures/files/index.js

@@ -129,6 +129,11 @@ it('reads npmignore', async () => {
   expect(files).not.toContain('e/index.cjs')
 })
 
+it('reads package.files', async () => {
+  let [lib] = await copyDirs('files')
+  await processDir(lib)
+})
+
 it('throws on non-index file', async () => {
   let [lib] = await copyDirs('non-index-error')
   let err