pulsar/spec/state-store-spec.js

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/** @babel */
import {it, fit, ffit, fffit, beforeEach, afterEach} from './async-spec-helpers'
const StateStore = require('../src/state-store.js')
describe("StateStore", () => {
let databaseName = `test-database-${Date.now()}`
let version = 1
it("can save, load, and delete states", () => {
const store = new StateStore(databaseName, version)
return store.save('key', {foo:'bar'})
.then(() => store.load('key'))
.then((state) => {
expect(state).toEqual({foo:'bar'})
})
.then(() => store.delete('key'))
.then(() => store.load('key'))
.then((value) => {
expect(value).toBeNull()
})
.then(() => store.count())
.then((count) => {
expect(count).toBe(0)
})
})
it("resolves with null when a non-existent key is loaded", () => {
const store = new StateStore(databaseName, version)
return store.load('no-such-key').then((value) => {
expect(value).toBeNull()
})
})
it("can clear the state object store", () => {
const store = new StateStore(databaseName, version)
return store.save('key', {foo:'bar'})
.then(() => store.count())
.then((count) =>
expect(count).toBe(1)
)
.then(() => store.clear())
.then(() => store.count())
.then((count) => {
expect(count).toBe(0)
})
})
describe("when there is an error reading from the database", () => {
it("rejects the promise returned by load", () => {
const store = new StateStore(databaseName, version)
const fakeErrorEvent = {target: {errorCode: "Something bad happened"}}
spyOn(IDBObjectStore.prototype, 'get').andCallFake((key) => {
let request = {}
process.nextTick(() => request.onerror(fakeErrorEvent))
return request
})
return store.load('nonexistentKey')
.then(() => {
throw new Error("Promise should have been rejected")
})
.catch((event) => {
expect(event).toBe(fakeErrorEvent)
})
})
})
})