Assertions counter
A simple assertions counter for asynchronous code testing
Installation
npm install assertions-counter
Usage
Example with mocha
It's convenient to count your assertions especially for mocked objects. In the example below a counter is called 2 times:
first in the mocked worker.changeState method, second in the callback function for worker.cleanIO method.
As the counter is equal to zero — mocha done function is called. Thus we match assertions number and test finish.
it('cleanIO', function (done) {
var ac = new AssertionsCounter(2, done);
var worker = {
changeState: function (newState) {
assert.instanceOf(newState, IdleState);
ac.add();
}
},
program = {
cleanIO: function (callback) {
callback(null);
}
},
storage,
state = new TerminatedState(worker, storage, program);
state.cleanIO(function (err) {
assert.isNull(err);
ac.add();
});
});