Assignments week 2 Ilias Khugaev

assignments/hackyourtemperature/__tests__/app.test.js

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+import app from "../app.js";
+import supertest from "supertest";
+
+const request = supertest(app);
+
+describe("get /", () => {
+    it(`it should return status code 200 and "Hello from backend to frontend!"`, (done) => {
+      request.get('/')
+      .expect(200, 'Hello from backend to frontend!', done)
+    });
+  });``
+
+
+  describe("POST /weather", () => {
+    it('should return status code 400 and "Missing name of city" if no cityName', (done) => {
+      request.post('/weather')
+        .send({ cityName: "" })
+        .expect(400, `{"error":"Missing name of city"}`, done)
+    });
+
+    it('should return status code 200 and contain "City: Amsterdam" and "temperature"', (done) => {
+        request.post('/weather')
+          .send({ cityName: "Amsterdam" })
+          .expect(200)
+          .expect(res => {
+            if (!res.text.includes("City: Amsterdam")) {
+              throw new Error('Response does not include "City: Amsterdam"');
+            }
+            if (!res.text.toLowerCase().includes("temperature")) {
+              throw new Error('Response does not include "temperature"');
+            }
+          })
+          .end(done);
+    });
+
+      it('should return status code 400 and "weatherText": "Error: city not found" if typing error', (done) => {
+        request.post('/weather')
+          .send({ cityName: "Amesterdam" })
+          .expect(400, `{"weatherText":"Error: city not found"}`, done)
+      });
+  });

assignments/hackyourtemperature/app.js

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+import express from "express";
+import fetch from "node-fetch";
+import keys from "./sources/keys.js";
+
+const app = express();
+
+app.use(express.json());
+
+app.get('/', (req, res) => {
+    res.status(200).send("Hello from backend to frontend!");
+});
+
+app.post('/weather', async (req, res) => {
+    const cityName = req.body.cityName;     
+    const responseText = { weatherText: "" }
+
+    if (!cityName) {
+        return res.status(400).json({ error: "Missing name of city" });
+    }
+
+    try {
+        const response = await fetch(`https://api.openweathermap.org/data/2.5/weather?q=${cityName}&appid=${keys.API_KEY}&units=metric`);
+        const data = await response.json();
+
+        if (!response.ok) {
+            const {message} = data;
+
+            throw new Error(message);
+        };
+
+        const {name, main} = data; 
+        responseText.weatherText = `City: ${name}, temperature: ${main.temp.toFixed(1)}°C`;
+        res.status(200).send(responseText);
+
+    } catch (error) {
+        responseText.weatherText = `${error}`;
+        res.status(400).send(responseText);
+    }
+
+});
+
+export default app;

assignments/hackyourtemperature/babel.config.cjs

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+module.exports = {
+  presets: [
+    [
+      // This is a configuration, here we are telling babel what configuration to use
+      "@babel/preset-env",
+      {
+        targets: {
+          node: "current",
+        },
+      },
+    ],
+  ],
+};

assignments/hackyourtemperature/jest.config.js

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+export default {
+  // Tells jest that any file that has 2 .'s in it and ends with either js or jsx should be run through the babel-jest transformer
+  transform: {
+    "^.+\\.jsx?$": "babel-jest",
+  },
+  // By default our `node_modules` folder is ignored by jest, this tells jest to transform those as well
+  transformIgnorePatterns: [],
+};

assignments/hackyourtemperature/package.json

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+{
+  "name": "hackyourtemperature",
+  "version": "1.0.0",
+  "main": "server.js",
+  "scripts": {
+    "test": "jest",
+    "start": "node server.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "module",
+  "description": "",
+  "dependencies": {
+    "express": "^5.1.0",
+    "node-fetch": "^3.3.2"
+  },
+  "devDependencies": {
+    "@babel/preset-env": "^7.27.1",
+    "babel-jest": "^29.7.0",
+    "jest": "^29.7.0",
+    "supertest": "^7.1.0"
+  }
+}

assignments/hackyourtemperature/server.js

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+import app from './app.js'; 
+
+const port = process.env.PORT || 3000;
+
+app.listen(port, () => console.log(`Listening on port ${port}`));

assignments/hackyourtemperature/sources/keys.js

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+const keys = { 
+    API_KEY: 
+}
+
+export default keys;