.eslintignore无法忽略指定路径及文件

[lwh2015]

### Version 3.2.1

Environment info

 System:
    OS: macOS 10.14.2
    CPU: (12) x64 Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
  Binaries:
    Node: 10.14.1 - /usr/local/bin/node
    Yarn: Not Found
    npm: 6.4.1 - /usr/local/bin/npm
  Browsers:
    Chrome: 71.0.3578.98
    Firefox: Not Found
    Safari: 12.0.2
  npmPackages:
    @vue/babel-preset-app:  3.2.0
    @vue/cli-overlay:  3.2.0
    @vue/cli-plugin-babel: ^3.2.0 => 3.2.0
    @vue/cli-plugin-e2e-cypress: ^3.2.0 => 3.2.0
    @vue/cli-plugin-eslint: ^3.2.0 => 3.2.1
    @vue/cli-plugin-pwa: ^3.2.0 => 3.2.0
    @vue/cli-plugin-unit-mocha: ^3.2.0 => 3.2.0
    @vue/cli-service: ^3.2.0 => 3.2.0
    @vue/cli-shared-utils:  3.2.0
    @vue/component-compiler-utils:  2.3.1
    @vue/eslint-config-prettier: ^4.0.1 => 4.0.1
    @vue/preload-webpack-plugin:  1.1.0
    @vue/test-utils: ^1.0.0-beta.20 => 1.0.0-beta.27
    @vue/web-component-wrapper:  1.2.0
    babel-helper-vue-jsx-merge-props:  2.0.3
    babel-plugin-transform-vue-jsx:  4.0.1
    eslint-plugin-vue: ^5.0.0-0 => 5.0.0
    vue: ^2.5.17 => 2.5.21
    vue-eslint-parser:  2.0.3
    vue-hot-reload-api:  2.3.1
    vue-loader:  15.4.2
    vue-router: ^3.0.1 => 3.0.2
    vue-style-loader:  4.1.2
    vue-template-compiler: ^2.5.17 => 2.5.21
    vue-template-es2015-compiler:  1.6.0
    vuex: ^3.0.1 => 3.0.1
  npmGlobalPackages:
    @vue/cli: 3.2.1

Steps to reproduce

1、在根目录下创建.eslintignore
2、忽略tests文件夹及其下面的所有文件
3、执行npm run lint

What is expected?

正常忽略指定路径文件

What is actually happening?

Error: No files matching 'tests' were found

[lwh2015]

补充：放上指定文件会报All files matched by '.*.js' are ignored，请问是为什么