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import {RootStoreModel} from '../../../src/state/models/root-store'
import {LinkMetasViewModel} from '../../../src/state/models/link-metas-view'
import * as LinkMetaLib from '../../../src/lib/link-meta'
import {LikelyType} from './../../../src/lib/link-meta'
import {sessionClient, SessionServiceClient} from '@atproto/api'
import {DEFAULT_SERVICE} from '../../../src/state'
describe('LinkMetasViewModel', () => {
let viewModel: LinkMetasViewModel
let rootStore: RootStoreModel
const getLinkMetaMockSpy = jest.spyOn(LinkMetaLib, 'getLinkMeta')
const mockedMeta = {
title: 'Test Title',
url: 'testurl',
likelyType: LikelyType.Other,
}
beforeEach(() => {
const api = sessionClient.service(DEFAULT_SERVICE) as SessionServiceClient
rootStore = new RootStoreModel(api)
viewModel = new LinkMetasViewModel(rootStore)
})
afterAll(() => {
jest.clearAllMocks()
})
describe('getLinkMeta', () => {
it('should return link meta if it is cached', async () => {
const url = 'http://example.com'
viewModel.cache.set(url, mockedMeta)
const result = await viewModel.getLinkMeta(url)
expect(getLinkMetaMockSpy).not.toHaveBeenCalled()
expect(result).toEqual(mockedMeta)
})
it('should return link meta if it is not cached', async () => {
getLinkMetaMockSpy.mockResolvedValueOnce(mockedMeta)
const result = await viewModel.getLinkMeta(mockedMeta.url)
expect(getLinkMetaMockSpy).toHaveBeenCalledWith(rootStore, mockedMeta.url)
expect(result).toEqual(mockedMeta)
})
it('should cache the link meta if it is successfully returned', async () => {
getLinkMetaMockSpy.mockResolvedValueOnce(mockedMeta)
await viewModel.getLinkMeta(mockedMeta.url)
expect(viewModel.cache.get(mockedMeta.url)).toEqual(mockedMeta)
})
it('should not cache the link meta if it fails to return', async () => {
const url = 'http://example.com'
const error = new Error('Failed to fetch link meta')
getLinkMetaMockSpy.mockRejectedValueOnce(error)
try {
await viewModel.getLinkMeta(url)
fail('Error was not thrown')
} catch (e) {
expect(e).toEqual(error)
expect(viewModel.cache.get(url)).toBeUndefined()
}
})
})
})
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