must-call

must-call is an assertion library for async test. This method is inspired from node.js project test/common.js.

const mustCall = require('must-call');

someCallback(mustCall(() => {
  // when callback does not called at the end of the process, 
  // throw exception.
}));

somePromiseTest().then(mustCall(() => {
  // when async test does not resolved at the end of the process, 
  // throw exception.
}));