output

> cross-env NODE_ENV=test nyc mocha test/unit/**/*.js



  add
    √ should be a function
    √ should return a promise
    √ should resolve a number


  3 passing (37ms)

----------|----------|----------|----------|----------|----------------|
File      |  % Stmts | % Branch |  % Funcs |  % Lines |Uncovered Lines |
----------|----------|----------|----------|----------|----------------|
All files |      100 |      100 |      100 |      100 |                |
 add.js   |      100 |      100 |      100 |      100 |                |
----------|----------|----------|----------|----------|----------------|

=============================== Coverage summary ===============================
Statements   : 100% ( 5/5 )
Branches     : 100% ( 0/0 )
Functions    : 100% ( 3/3 )
Lines        : 100% ( 3/3 )
================================================================================