chore: test case for command suggestion (#5228)

Author: jamesgeorge007

packages/@vue/cli/__tests__/args.spec.js

@@ -0,0 +1,11 @@
+const path = require('path')
+const execa = require('execa')
+
+const CLI_PATH = path.resolve(__dirname, '..', 'bin', 'vue.js')
+
+const runAsync = async args => await execa(CLI_PATH, args)
+
+test('suggests matching command', async () => {
+  const { stdout } = await runAsync(['confgi'])
+  expect(stdout).toContain('Did you mean config?')
+})