test.js
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'use strict';
var expect = require('expect.js');
var promiseRetry = require('../');
var promiseDelay = require('sleep-promise');
describe('promise-retry', function () {
it('should call fn again if retry was called', function () {
var count = 0;
return promiseRetry(function (retry) {
count += 1;
return promiseDelay(10)
.then(function () {
if (count <= 2) {
retry(new Error('foo'));
}
return 'final';
});
}, { factor: 1 })
.then(function (value) {
expect(value).to.be('final');
expect(count).to.be(3);
}, function () {
throw new Error('should not fail');
});
});
it('should call fn with the attempt number', function () {
var count = 0;
return promiseRetry(function (retry, number) {
count += 1;
expect(count).to.equal(number);
return promiseDelay(10)
.then(function () {
if (count <= 2) {
retry(new Error('foo'));
}
return 'final';
});
}, { factor: 1 })
.then(function (value) {
expect(value).to.be('final');
expect(count).to.be(3);
}, function () {
throw new Error('should not fail');
});
});
it('should not retry on fulfillment if retry was not called', function () {
var count = 0;
return promiseRetry(function () {
count += 1;
return promiseDelay(10)
.then(function () {
return 'final';
});
})
.then(function (value) {
expect(value).to.be('final');
expect(count).to.be(1);
}, function () {
throw new Error('should not fail');
});
});
it('should not retry on rejection if retry was not called', function () {
var count = 0;
return promiseRetry(function () {
count += 1;
return promiseDelay(10)
.then(function () {
throw new Error('foo');
});
})
.then(function () {
throw new Error('should not succeed');
}, function (err) {
expect(err.message).to.be('foo');
expect(count).to.be(1);
});
});
it('should not retry on rejection if nr of retries is 0', function () {
var count = 0;
return promiseRetry(function (retry) {
count += 1;
return promiseDelay(10)
.then(function () {
throw new Error('foo');
})
.catch(retry);
}, { retries : 0 })
.then(function () {
throw new Error('should not succeed');
}, function (err) {
expect(err.message).to.be('foo');
expect(count).to.be(1);
});
});
it('should reject the promise if the retries were exceeded', function () {
var count = 0;
return promiseRetry(function (retry) {
count += 1;
return promiseDelay(10)
.then(function () {
throw new Error('foo');
})
.catch(retry);
}, { retries: 2, factor: 1 })
.then(function () {
throw new Error('should not succeed');
}, function (err) {
expect(err.message).to.be('foo');
expect(count).to.be(3);
});
});
it('should pass options to the underlying retry module', function () {
var count = 0;
return promiseRetry(function (retry) {
return promiseDelay(10)
.then(function () {
if (count < 2) {
count += 1;
retry(new Error('foo'));
}
return 'final';
});
}, { retries: 1, factor: 1 })
.then(function () {
throw new Error('should not succeed');
}, function (err) {
expect(err.message).to.be('foo');
});
});
it('should convert direct fulfillments into promises', function () {
return promiseRetry(function () {
return 'final';
}, { factor: 1 })
.then(function (value) {
expect(value).to.be('final');
}, function () {
throw new Error('should not fail');
});
});
it('should convert direct rejections into promises', function () {
promiseRetry(function () {
throw new Error('foo');
}, { retries: 1, factor: 1 })
.then(function () {
throw new Error('should not succeed');
}, function (err) {
expect(err.message).to.be('foo');
});
});
it('should not crash on undefined rejections', function () {
return promiseRetry(function () {
throw undefined;
}, { retries: 1, factor: 1 })
.then(function () {
throw new Error('should not succeed');
}, function (err) {
expect(err).to.be(undefined);
})
.then(function () {
return promiseRetry(function (retry) {
retry();
}, { retries: 1, factor: 1 });
})
.then(function () {
throw new Error('should not succeed');
}, function (err) {
expect(err).to.be(undefined);
});
});
it('should retry if retry() was called with undefined', function () {
var count = 0;
return promiseRetry(function (retry) {
count += 1;
return promiseDelay(10)
.then(function () {
if (count <= 2) {
retry();
}
return 'final';
});
}, { factor: 1 })
.then(function (value) {
expect(value).to.be('final');
expect(count).to.be(3);
}, function () {
throw new Error('should not fail');
});
});
it('should work with several retries in the same chain', function () {
var count = 0;
return promiseRetry(function (retry) {
count += 1;
return promiseDelay(10)
.then(function () {
retry(new Error('foo'));
})
.catch(function (err) {
retry(err);
});
}, { retries: 1, factor: 1 })
.then(function () {
throw new Error('should not succeed');
}, function (err) {
expect(err.message).to.be('foo');
expect(count).to.be(2);
});
});
it('should allow options to be passed first', function () {
var count = 0;
return promiseRetry({ factor: 1 }, function (retry) {
count += 1;
return promiseDelay(10)
.then(function () {
if (count <= 2) {
retry(new Error('foo'));
}
return 'final';
});
}).then(function (value) {
expect(value).to.be('final');
expect(count).to.be(3);
}, function () {
throw new Error('should not fail');
});
});
});