1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253
var assert = require('assert');
var R = require('../source');var eq = require('./shared/eq');

describe('andThen', function() {  it('invokes then on the promise with the function passed to it', function(done) {    R.andThen(      function(n) {        eq(n, 1);        done();      },      Promise.resolve(1)    );  });
  it('flattens promise returning functions', function(done) {    var incAndWrap = R.compose(Promise.resolve.bind(Promise), R.inc);    var asyncAddThree = R.pipe(incAndWrap, R.andThen(incAndWrap), R.andThen(incAndWrap));
    R.andThen(function(result) {      eq(result, 4);      done();    })(asyncAddThree(1));  });
  it('throws a typeError if the then method does not exist', function() {    assert.throws(      function() { R.andThen(R.inc, 1); },      function(err) {        return err.constructor === TypeError &&          err.message === '`andThen` expected a Promise, received 1';      }    );  });
  it('is not dependent on a particular promise implementation', function(done) {    var thennable = {      then: function(f) {        return f(42);      }    };
    var f = function(n) {      eq(n, 42);      done();    };
    R.andThen(f, thennable);  });});