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Commit8b9c28c

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committed
setup: useEffect to load messages
1 parent132ce3d commit8b9c28c

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9 files changed

+153
-4
lines changed

9 files changed

+153
-4
lines changed

‎package.json

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@@ -29,6 +29,7 @@
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"@fortawesome/free-solid-svg-icons":"^5.12.0",
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"@fortawesome/react-fontawesome":"^0.1.8",
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"bootstrap":"^4.4.1",
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"faker":"^4.1.0",
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"react":"^16.12.0",
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"react-bootstrap":"^1.0.0-beta.16",
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"react-dom":"^16.12.0",

‎src/components/Feed/index.js

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importReactfrom"react";
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import{Icon}from"../Icon";
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import{Message}from"../Message";
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import"./styles.css";
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importfetchDatafrom"../../services/api";
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exportconstFeed=()=>{
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constloading=true;
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consterror=null;
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constdata=null;
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// TODO: useEffect to load state from fetchData
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fetchData("messages")
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.then(messages=>{
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data=messages;
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loading=false;
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})
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.catch(error=>{
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error=error;
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});
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if(loading){
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return(
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<divclassName="Feed">
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<divclassName="Feed_Loading"title="loading">
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<Iconicon="loading"spinsize="lg"data-testid="loading"/>
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</div>
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</div>
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);
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}
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if(error){
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return<divtitle="error">{error.message}</div>;
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}
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return(
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<divclassName="Feed"title="feed">
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{data.map(post=>(
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<Messagekey={post.id_str}{...post}/>
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))}
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</div>
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);
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};

‎src/components/Feed/styles.css

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.Feed {
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background-color:"red";
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}
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.Feed_Loading {
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display: flex;
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justify-content: center;
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padding-top:30px;
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}
File renamed without changes.

‎src/services/api.js

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import*asfakerfrom'faker'
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constapi=asyncurl=>{
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// sign up for a developer twitter account to get real tweets
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// examples at https://api.twitter.com/1.1/search/tweets.json
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// fake api delay
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awaitnewPromise((resolve,reject)=>{
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setTimeout(resolve,1500)
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})
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// fake api
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switch(url){
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case'messages':
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// generate fake data
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constfakeMessages=[1,2,3,4,5,6].map(()=>({
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id_str:faker.random.uuid(),
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created_at:faker.date.recent().toISOString(),
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text:faker.lorem.paragraph(),
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retweet_count:faker.random.number(50),
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retweeted:false,
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favorite_count:faker.random.number(50),
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favorited:false,
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user:{
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id_str:faker.random.uuid(),
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name:faker.internet.userName(),
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screen_name:faker.internet.userName(),
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profile_image_url_https:faker.image.avatar(),
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},
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}))
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returnfakeMessages
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default:
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thrownewError('Unknown API endpoint')
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}
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}
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exportdefaultapi

‎src/stories/2-Message.stories.js

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@@ -1,6 +1,6 @@
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importReactfrom"react";
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import{MessageasUseStateMessage}from"../components/Message/useState";
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import{MessageasUseReducerMessage}from"../components/Message/useReducer";
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import{MessageasUseReducerMessage}from"../components/Message";
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import{USER}from"../config";
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exportdefault{

‎src/stories/3-Feed.stories.js

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importReactfrom"react";
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import{Feed}from"../components/Feed";
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exportdefault{
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title:"Feed"
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};
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exportconstfeed=()=>{
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return<Feed/>;
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};

‎src/tests/components/Feed.test.js

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importReactfrom"react";
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import{render}from"@testing-library/react";
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import{waitForElementToBeRemoved}from"@testing-library/dom";
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import{Feed}from"../../components/Feed";
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constmockData=[
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{
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id_str:"1",
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created_at:newDate().toISOString(),
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text:"Some text",
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retweet_count:10,
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retweeted:false,
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favorite_count:15,
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favorited:false,
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user:{
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id_str:"u1",
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name:"Some User",
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screen_name:"someUser",
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profile_image_url_https:""
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}
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}
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];
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jest.mock("../../services/api.js",()=>jest.fn(async()=>mockData));
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// UI
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describe("Feed",()=>{
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// generated useEffect async warnings
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test("should initially display loading",()=>{
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constutils=render(<Feed/>);
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constloading=utils.getByTitle("loading");
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expect(loading).toBeDefined();
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constfeed=utils.queryByTitle("feed");// query doesn't throw
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expect(feed).toBe(null);
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});
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test("should display feed when loaded",async()=>{
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constutils=render(<Feed/>);
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awaitwaitForElementToBeRemoved(()=>{
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returnutils.getByTestId("loading");
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});
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constfeed=utils.getByTitle("feed");
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expect(feed).toBeDefined();
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});
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});

‎src/tests/components/Message.test.js

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importReactfrom"react";
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import{render,fireEvent}from"@testing-library/react";
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import{Message,messageReducer}from"../../components/Message/useReducer";
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import{Message,messageReducer}from"../../components/Message";
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import{USER}from"../../config";
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constmockProps={
@@ -13,7 +13,7 @@ const mockProps = {
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favorite_count:22
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};
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16-
describe("Message",()=>{
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describe.skip("Message",()=>{
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test("should display the initial favorite count",()=>{
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constutils=render(<Message{...mockProps}/>);
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constcount=utils.getByTitle("favorite_count");
@@ -68,7 +68,7 @@ const initialState = {
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favorite_count:22
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};
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71-
describe("messageReducer",()=>{
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describe.skip("messageReducer",()=>{
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test("should display the initial values",()=>{
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constreturnsState=messageReducer(initialState,{type:"UNKNOWN"});
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expect(returnsState).toEqual(initialState);

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