Chai Assert - thelastmile/FreeCodeCamp GitHub Wiki
Assert(expression, message)
- @param{ Mixed }expressionto test for truthiness
- @param{ String }messageto display on error
Write your own test expressions.
assert('foo' !== 'bar', 'foo is not bar');
assert(Array.isArray([]), 'empty arrays are arrays');
details: http://chaijs.com/api/assert/