Sorted all current test cases into some groups

[Jinjiang]

... to make tests more maintainable.

The structure after sorting:

• vue-loader
  • basic usage
    • basic
    • pre-processors
    • style import
    • template import
    • script import
  • advanced features
    • pre/post loaders
    • support chaining with other loaders
    • expose filename
    • extract CSS
    • extract CSS using option
    • extract CSS using option (passing plugin instance)
    • pre-processors with extract css
    • source map
    • dependency injection
    • hot reload enabled
    • hot reload disabled
    • cacheBusting: false
  • template block features
    • template with comments
    • transpile ES2015 features in template
    • translates relative URLs and respects resolve alias
    • transformToRequire option
    • should allow adding custom html loaders
    • custom compiler modules
    • custom compiler modules (string)
    • custom compiler directives
    • functional component with styles
    • functional template
  • style block features
    • scoped style
    • media-query
    • supports-query
    • postcss options
    • load postcss config file
    • load postcss config file by path
    • load postcss config file with js syntax error
    • postcss lang
    • css-modules
  • script block features
    • allows to export extended constructor
    • support es compatible modules
    • named exports
  • custom block features
    • extract custom blocks to a separate file
    • add custom blocks to the webpack output
    • custom blocks work with src imports
    • passes Component to custom block loaders
    • custom blocks can be ignored
    • custom blocks with ES module default export
    • passes attributes as options to the loader
    • pre/post loaders for custom blocks
  • SSR
    • css-modules in SSR
    • SSR style and moduleId extraction

Thanks.

[yyx990803]

Looks like there's a conflict - I think it would be even better to split the tests and helpers into separate files - right now a single file is becoming hard to navigate.

[Jinjiang]

Agree, I will resolve the conflict and separate the code soon.