chore(TypeScript): remove mock-fs

test/stub/mockfs.ts

@@ -0,0 +1,31 @@
+import { fs } from 'src/parser/template'
+import { isString } from 'src/util/underscore'
+
+const readFile = fs.readFile
+const stat = fs.stat
+
+type fileDescriptor = { mode: string, content: string }
+
+export function mock (files: { [path: string]: (string | fileDescriptor) }) {
+  for (const [key, val] of Object.entries(files)) {
+    files[key] = isString(val)
+      ? { mode: '33188', content: val as string }
+      : val
+  }
+  fs.readFile = async function (path) {
+    const file = files[path] as fileDescriptor
+    if (file === undefined) throw new Error('ENOENT')
+    if (file.mode === '000') throw new Error('EACCES')
+    return file.content
+  }
+  fs.stat = async function (path) {
+    const file = files[path] as fileDescriptor
+    if (file === undefined) throw new Error('ENOENT')
+    return file
+  }
+}
+
+export function restore () {
+  fs.readFile = readFile
+  fs.stat = stat
+}