resource-lock.test.js
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'use strict';
const ResourceLock = require('../../../../lib/dialects/mssql/resource-lock'),
Promise = require('../../../../lib/promise'),
assert = require('assert'),
Support = require('../../support'),
dialect = Support.getTestDialect();
if (dialect === 'mssql') {
describe('[MSSQL Specific] ResourceLock', () => {
it('should process requests serially', () => {
const expected = {};
const lock = new ResourceLock(expected);
let last = 0;
function validateResource(actual) {
assert.equal(actual, expected);
}
return Promise.all([
Promise.using(lock.lock(), resource => {
validateResource(resource);
assert.equal(last, 0);
last = 1;
return Promise.delay(15);
}),
Promise.using(lock.lock(), resource => {
validateResource(resource);
assert.equal(last, 1);
last = 2;
}),
Promise.using(lock.lock(), resource => {
validateResource(resource);
assert.equal(last, 2);
last = 3;
return Promise.delay(5);
})
]);
});
it('should still return resource after failure', () => {
const expected = {};
const lock = new ResourceLock(expected);
function validateResource(actual) {
assert.equal(actual, expected);
}
return Promise.all([
Promise.using(lock.lock(), resource => {
validateResource(resource);
throw new Error('unexpected error');
}).catch(() => {}),
Promise.using(lock.lock(), validateResource)
]);
});
it('should be able to.lock resource without waiting on lock', () => {
const expected = {};
const lock = new ResourceLock(expected);
assert.equal(lock.unwrap(), expected);
});
});
}