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whilst.js
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whilst.js
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import async from '../src/asyncp';
describe('whilst', function() {
it('supports delayed task and delayed condition', function() {
let order = [];
const p = async.whilst(
count => new Promise(resolve => setTimeout(_ => {
order.push(`condition${count}`);
resolve(count < 5);
}, 25)),
count => new Promise(resolve => setTimeout(_ => {
order.push(`task${count}`);
count++;
resolve(count);
}, 25)),
0
);
return Promise.all([
p.should.eventually.equal(undefined),
p.then(() => order.should.deep.equal([
'condition0',
'task0',
'condition1',
'task1',
'condition2',
'task2',
'condition3',
'task3',
'condition4',
'task4',
'condition5'
]))
]);
});
it('supports delayed task and promise condition', function() {
let order = [];
const p = async.whilst(
count => new Promise(resolve => {
order.push(`condition${count}`);
resolve(count < 5);
}),
count => new Promise(resolve => setTimeout(_ => {
order.push(`task${count}`);
count++;
resolve(count);
}, 25)),
0
);
return Promise.all([
p.should.eventually.equal(undefined),
p.then(() => order.should.deep.equal([
'condition0',
'task0',
'condition1',
'task1',
'condition2',
'task2',
'condition3',
'task3',
'condition4',
'task4',
'condition5'
]))
]);
});
it('supports promise task and promise condition', function() {
let order = [];
const p = async.whilst(
count => new Promise(resolve => {
order.push(`condition${count}`);
resolve(count < 5);
}),
count => new Promise(resolve => {
order.push(`task${count}`);
count++;
resolve(count);
}),
0
);
return Promise.all([
p.should.eventually.equal(undefined),
p.then(() => order.should.deep.equal([
'condition0',
'task0',
'condition1',
'task1',
'condition2',
'task2',
'condition3',
'task3',
'condition4',
'task4',
'condition5'
]))
]);
});
it('supports promised arguments', function() {
let order = [];
const p = async.whilst(
new Promise(resolve => setTimeout(
resolve.bind(
null,
count => new Promise(resolve => setTimeout(_ => {
order.push(`condition${count}`);
resolve(count < 5);
}, 25))
),
25
)),
new Promise(resolve => setTimeout(
resolve.bind(
null,
count => new Promise(resolve => setTimeout(_ => {
order.push(`task${count}`);
count++;
resolve(count);
}, 25))
),
25
)),
Promise.resolve(0)
);
return Promise.all([
p.should.eventually.equal(undefined),
p.then(() => order.should.deep.equal([
'condition0',
'task0',
'condition1',
'task1',
'condition2',
'task2',
'condition3',
'task3',
'condition4',
'task4',
'condition5'
]))
]);
});
it('rejects in delayed task', function() {
let order = [];
const p = async.whilst(
count => new Promise(resolve => setTimeout(_ => {
order.push(`condition${count}`);
resolve(count < 5);
}, 25)),
count => new Promise((resolve, reject) => setTimeout(_ => {
order.push(`task${count}`);
count++;
if (count == 3) {
reject(new Error('error'));
} else {
resolve(count);
}
}, 25)),
0
);
return Promise.all([
p.should.eventually.be.rejectedWith(Error),
new Promise(resolve => setTimeout(
() => resolve(order.should.deep.equal([
'condition0',
'task0',
'condition1',
'task1',
'condition2',
'task2'
])),
11 * 25
))
]);
});
it('rejects in promise task', function() {
let order = [];
const p = async.whilst(
count => new Promise(resolve => setTimeout(_ => {
order.push(`condition${count}`);
resolve(count < 5);
}, 25)),
count => new Promise((resolve, reject) => {
order.push(`task${count}`);
count++;
if (count == 3) {
reject(new Error('error'));
} else {
resolve(count);
}
}),
0
);
return Promise.all([
p.should.eventually.be.rejectedWith(Error),
new Promise(resolve => setTimeout(
() => resolve(order.should.deep.equal([
'condition0',
'task0',
'condition1',
'task1',
'condition2',
'task2'
])),
11 * 25
))
]);
});
it('rejects in native task', function() {
let order = [];
const p = async.whilst(
count => {
order.push(`condition${count}`);
return count < 5;
},
count => {
order.push(`task${count}`);
count++;
if (count == 3) {
throw new Error('error');
} else {
return count;
}
},
0
);
return Promise.all([
p.should.eventually.be.rejectedWith(Error),
new Promise(resolve => setTimeout(
() => resolve(order.should.deep.equal([
'condition0',
'task0',
'condition1',
'task1',
'condition2',
'task2'
])),
25
))
]);
});
it('rejects in delayed condition', function() {
let order = [];
const p = async.whilst(
count => new Promise((resolve, reject) => setTimeout(_ => {
order.push(`condition${count}`);
if (count == 3) {
reject(new Error('error'));
} else {
resolve(count < 5);
}
}, 25)),
count => new Promise(resolve => setTimeout(_ => {
order.push(`task${count}`);
count++;
resolve(count);
}, 25)),
0
);
return Promise.all([
p.should.eventually.be.rejectedWith(Error),
new Promise(resolve => setTimeout(
() => resolve(order.should.deep.equal([
'condition0',
'task0',
'condition1',
'task1',
'condition2',
'task2',
'condition3'
])),
11 * 25
))
]);
});
it('rejects in promise condition', function() {
let order = [];
const p = async.whilst(
count => new Promise((resolve, reject) => {
order.push(`condition${count}`);
if (count == 3) {
reject(new Error('error'));
} else {
resolve(count < 5);
}
}),
count => new Promise(resolve => {
order.push(`task${count}`);
count++;
resolve(count);
}),
0
);
return Promise.all([
p.should.eventually.be.rejectedWith(Error),
new Promise(resolve => setTimeout(
() => resolve(order.should.deep.equal([
'condition0',
'task0',
'condition1',
'task1',
'condition2',
'task2',
'condition3'
])),
11 * 25
))
]);
});
it('rejects in native condition', function() {
let order = [];
const p = async.whilst(
count => {
order.push(`condition${count}`);
if (count == 3) {
throw new Error('error');
} else {
return count < 5;
}
},
count => {
order.push(`task${count}`);
count++;
return count;
},
0
);
return Promise.all([
p.should.eventually.be.rejectedWith(Error),
new Promise(resolve => setTimeout(
() => resolve(order.should.deep.equal([
'condition0',
'task0',
'condition1',
'task1',
'condition2',
'task2',
'condition3'
])),
11 * 25
))
]);
});
it('has during alias', function(done) {
assert.strictEqual(async.whilst, async.during);
done();
});
});