Files
KaTeX/test
ylemkimon 71035c7111 Refactor test helpers (#1336)
* Refactor test helpers

* Combine common codes from `parse` and `build`, and dispatch using
`Mode`
* Remove `toNotBuild` and `toNotParse` and use `expect.not`
* Remove `Warning` and instead mock `console.warn`
* Add `expect.toHavePassed` and check whether parse/build succeeded
lazily
* Improve failed test `message`:
  - Use color
  - Print stack traces(excluding internals)
  - Print diff
  - Follow jest matcher output style

* Update helpers.js

* Remove toBeTruthy checks

getParsed throws an error if parsing fails.

* Used tagged literals

* Use .toHaveLength

* Use tagged literals

* Use to{Build,Parse}Like where possible

* Remove compareParseTree

* Use snapshot where possible

* Join into one line where <88 chars

* Revert console.warn() to throw an error

Merge `expectToWarn` to `expectKaTeX`, like
`expect.toFailWithParseError`

* Remove call to console.warn from stack traces

* Fix merge errors

* Remove `getTree`

* Move `_getBuilt` into `getBuilt`
* Move default settings and tagging literal support in to `getParsed` 
and `getBuilt`
* Remove stack traces clean-up
* Remove `toHavePassed` matcher

* Extract `expected` string construction into `printExpectedResult`
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