dla
Version:
node.js data loader with caching and support of lists
284 lines • 9.56 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
require("source-map-support/register");
const assert = require("assert");
const __1 = require("..");
function initCollection(cache) {
const result = {
collection: new __1.Collection({
cache,
extractId: (item) => item.id,
loadFew: (ids) => {
result.queryCounter++;
result.objectsCounter += ids.length;
return new Promise((resolve) => {
setTimeout(() => {
resolve(__1.index(ids.map((id) => ({
id,
})), (item) => item.id));
}, 300);
});
},
}),
objectsCounter: 0,
queryCounter: 0,
};
return result;
}
function initListableCollection(cache) {
const data = [{
id: '1',
age: 28,
sex: 'm',
}, {
id: '2',
age: 25,
sex: 'f',
}, {
id: '3',
age: 16,
sex: 'm',
}, {
id: '4',
age: 52,
sex: 'f',
}];
const result = {
collection: new __1.ListableCollection({
cache,
extractId: (human) => human.id,
loadOne: (id) => {
result.objectsCounter++;
return new Promise((resolve) => {
setTimeout(() => {
resolve(data.find((item) => item.id === id));
}, 300);
});
},
loadList: (filter) => {
result.listsCounter++;
return {
items: data.filter((item) => (!('minAge' in filter) || item.age >= filter.minAge) &&
(!('sex' in filter) || item.sex === filter.sex)),
};
},
invalidationTags: (filter) => {
const invalidators = [];
if ('sex' in filter) {
invalidators.push(`sex=${filter.sex}`);
}
return invalidators;
},
}),
listsCounter: 0,
objectsCounter: 0,
};
return result;
}
describe('cache', () => {
it('get/set/remove', () => __awaiter(this, void 0, void 0, function* () {
const cache = new __1.MemoryCache();
assert(!(yield cache.get('a')));
yield cache.set('a', { a: 55 });
assert.deepEqual(yield cache.get('a'), { a: 55 });
yield cache.remove('a');
assert(!(yield cache.get('a')));
}));
it('objects cache', () => __awaiter(this, void 0, void 0, function* () {
const cache = new __1.MemoryCache();
const test1 = initCollection(cache);
assert.deepEqual(yield test1.collection.getFewAsArray(['5', '5', '6', '7']), [{ id: '5' }, { id: '5' }, { id: '6' }, { id: '7' }]);
assert.equal(test1.queryCounter, 1);
assert.equal(test1.objectsCounter, 3);
const test2 = initCollection(cache);
assert.deepEqual(yield test2.collection.getFewAsArray(['4', '6', '8']), [{ id: '4' }, { id: '6' }, { id: '8' }]);
assert.equal(test2.queryCounter, 1);
assert.equal(test2.objectsCounter, 2);
yield test2.collection.clearCache('5');
yield test2.collection.clearCache(['6', '8']);
assert.deepEqual(yield test2.collection.getFewAsArray(['4', '5', '6', '7', '8']), [{ id: '4' }, { id: '5' }, { id: '6' }, { id: '7' }, { id: '8' }]);
assert.equal(test2.queryCounter, 2);
assert.equal(test2.objectsCounter, 5);
}));
it('lists cache', () => __awaiter(this, void 0, void 0, function* () {
const cache = new __1.MemoryCache();
const test1 = initListableCollection(cache);
assert.deepEqual(yield test1.collection.getList({
minAge: 27,
}), [{
id: '1',
age: 28,
sex: 'm',
}, {
id: '4',
age: 52,
sex: 'f',
}]);
assert.equal(test1.objectsCounter, 0);
assert.equal(test1.listsCounter, 1);
assert.deepEqual(yield test1.collection.getList({
minAge: 27,
}), [{
id: '1',
age: 28,
sex: 'm',
}, {
id: '4',
age: 52,
sex: 'f',
}]);
assert.equal(test1.objectsCounter, 0);
assert.equal(test1.listsCounter, 1);
const test2 = initListableCollection(cache);
assert.deepEqual(yield test2.collection.getList({
minAge: 27,
}), [{
id: '1',
age: 28,
sex: 'm',
}, {
id: '4',
age: 52,
sex: 'f',
}]);
assert.equal(test2.objectsCounter, 0);
assert.equal(test2.listsCounter, 0);
assert.deepEqual(yield test2.collection.getList({
minAge: 29,
}), [{
id: '4',
age: 52,
sex: 'f',
}]);
assert.equal(test2.objectsCounter, 0);
assert.equal(test2.listsCounter, 1);
yield test2.collection.clearCache('1');
assert.deepEqual(yield test2.collection.getList({
minAge: 27,
}), [{
id: '1',
age: 28,
sex: 'm',
}, {
id: '4',
age: 52,
sex: 'f',
}]);
assert.equal(test2.objectsCounter, 0);
assert.equal(test2.listsCounter, 2);
assert.deepEqual(yield test2.collection.getList({
minAge: 29,
}), [{
id: '4',
age: 52,
sex: 'f',
}]);
assert.equal(test2.objectsCounter, 0);
assert.equal(test2.listsCounter, 2);
}));
it('invalidate list cache', () => __awaiter(this, void 0, void 0, function* () {
const cache = new __1.MemoryCache();
const test1 = initListableCollection(cache);
assert.deepEqual(yield test1.collection.getList({
sex: 'm',
}), [{
id: '1',
age: 28,
sex: 'm',
}, {
id: '3',
age: 16,
sex: 'm',
}]);
assert.deepEqual(yield test1.collection.getList({
sex: 'f',
}), [{
id: '2',
age: 25,
sex: 'f',
}, {
id: '4',
age: 52,
sex: 'f',
}]);
assert.equal(test1.objectsCounter, 0);
assert.equal(test1.listsCounter, 2);
yield test1.collection.invalidateCacheTag('sex=m');
assert.deepEqual(yield test1.collection.getList({
sex: 'm',
}), [{
id: '1',
age: 28,
sex: 'm',
}, {
id: '3',
age: 16,
sex: 'm',
}]);
assert.equal(test1.objectsCounter, 0);
assert.equal(test1.listsCounter, 3);
assert.deepEqual(yield test1.collection.getList({
sex: 'f',
}), [{
id: '2',
age: 25,
sex: 'f',
}, {
id: '4',
age: 52,
sex: 'f',
}]);
assert.equal(test1.objectsCounter, 0);
assert.equal(test1.listsCounter, 3);
const test2 = initListableCollection(cache);
assert.deepEqual(yield test2.collection.getList({
sex: 'm',
}), [{
id: '1',
age: 28,
sex: 'm',
}, {
id: '3',
age: 16,
sex: 'm',
}]);
assert.equal(test2.objectsCounter, 0);
assert.equal(test2.listsCounter, 0);
assert.deepEqual(yield test1.collection.getList({
sex: 'f',
}), [{
id: '2',
age: 25,
sex: 'f',
}, {
id: '4',
age: 52,
sex: 'f',
}]);
assert.equal(test2.objectsCounter, 0);
assert.equal(test2.listsCounter, 0);
test2.collection.invalidateCacheTag('sex=f');
assert.deepEqual(yield test2.collection.getList({
sex: 'f',
}), [{
id: '2',
age: 25,
sex: 'f',
}, {
id: '4',
age: 52,
sex: 'f',
}]);
assert.equal(test2.objectsCounter, 0);
assert.equal(test2.listsCounter, 1);
}));
});
//# sourceMappingURL=cache.t.js.map