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var async = require('../lib');
var {expect} = require('chai');
var assert = require('assert');
describe('ensureAsync', () => {
var passContext = function(cb) {
cb(this);
};
it('defer sync functions', (done) => {
var sync = true;
async.ensureAsync((arg1, arg2, cb) => {
expect(arg1).to.equal(1);
expect(arg2).to.equal(2);
cb(null, 4, 5);
})(1, 2, (err, arg4, arg5) => {
expect(err).to.equal(null);
expect(arg4).to.equal(4);
expect(arg5).to.equal(5);
assert(!sync, 'callback called on same tick');
done();
});
sync = false;
});
it('do not defer async functions', (done) => {
var sync = false;
async.ensureAsync((arg1, arg2, cb) => {
expect(arg1).to.equal(1);
expect(arg2).to.equal(2);
async.setImmediate(() => {
sync = true;
cb(null, 4, 5);
sync = false;
});
})(1, 2, (err, arg4, arg5) => {
expect(err).to.equal(null);
expect(arg4).to.equal(4);
expect(arg5).to.equal(5);
assert(sync, 'callback called on next tick');
done();
});
});
it('double wrapping', (done) => {
var sync = true;
async.ensureAsync(async.ensureAsync((arg1, arg2, cb) => {
expect(arg1).to.equal(1);
expect(arg2).to.equal(2);
cb(null, 4, 5);
}))(1, 2, (err, arg4, arg5) => {
expect(err).to.equal(null);
expect(arg4).to.equal(4);
expect(arg5).to.equal(5);
assert(!sync, 'callback called on same tick');
done();
});
sync = false;
});
it('should propely bind context to the wrapped function', (done) => {
// call bind after wrapping with ensureAsync
var context = {context: "post"};
var postBind = async.ensureAsync(passContext);
postBind = postBind.bind(context);
postBind((ref) => {
expect(ref).to.equal(context);
done();
});
});
it('should not override the bound context of a function when wrapping', (done) => {
// call bind before wrapping with ensureAsync
var context = {context: "pre"};
var preBind = passContext.bind(context);
preBind = async.ensureAsync(preBind);
preBind((ref) => {
expect(ref).to.equal(context);
done();
});
});
});
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