Conversion for Mocha

[jamestalmage]

From avajs/ava#644

@spudly has a start here: https://astexplorer.net/#/Uwl4f415pa

For completeness, here's a list of everything that I think would be needed for a complete mocha codemod:

• transform it() to test()
• add t parameter to a ArrowFunctionExpression passed to test()
• don't de-sync async functions (the codemod above will mess those up currently)
• add t parameter to a FunctionExpression passed to test()
• transform beforeEach() to test.beforeEach()
• transform afterEach() to test.afterEach()
• transform after() to test.after()
• transform before() to test.before()
• remove describe() blocks, prepending their text to each test block's description
• intelligently handle nested describe blocks if possible. how do we handle nested describe blocks with their own lifecycle hooks?
• if the test body FunctionExpression or ArrowFunctionExpression is async, it should use test.serial instead of test

Also, it would be nice to have a separate codemod to transform chai assertions to ava assertions.

@spudly - avajs/ava#644 (comment)

• Transform tests containing a callback ( it('foo', function (done) { ... }) ) to test.cb(t => ... t.end();

@jfmengels - avajs/ava#644 (comment)

[jamestalmage]

Ideas for handling lifecycle functions and groups:

• Codemods for transitioning from tap/tape/mocha ava#644 (comment)
• Codemods for transitioning from tap/tape/mocha ava#644 (comment)
• Codemods for transitioning from tap/tape/mocha ava#644 (comment)