refactor: remove axios dependency

lib/SteamCardExchange.js

@@ -1,10 +1,17 @@
 const HTMLUtils = require('./HTMLUtils')
-const axios = require('axios')
+
+const throwIfHttpError = response => {
+    if (!response.ok) {
+        throw new Error(`HTTP-${response.status} ${response.statusText}`)
+    }
+    return response
+}
 
 class SteamCardExchange {
     static async getBadges() {
-        const response = await axios.get('https://www.steamcardexchange.net/api/request.php?GetInventory')
-        const data = response.data.data
+        const endpoint = 'https://www.steamcardexchange.net/api/request.php?GetInventory'
+        const response = await fetch(endpoint).then(throwIfHttpError)
+        const data = await response.json().then(json => json.data)
 
         if (!data) {
             throw new Error('Malformed response')

lib/__tests__/SteamCardExchange.test.js

@@ -1,11 +1,5 @@
 const SteamCardExchange = require('../SteamCardExchange')
-const axios = require('axios')
-
-jest.mock('axios')
-
-beforeEach(() => {
-    jest.resetAllMocks()
-})
+const fetchSpy = jest.spyOn(global, 'fetch')
 
 const badgeA = {
     112233: {
@@ -26,35 +20,53 @@ const badgeC = {
     }
 }
 
+const mockFechSuccess = (badges) => {
+    let json = {}
+    if (badges) {
+        json = { data: Object.entries(badges).map(([appid, badge]) => [[appid, badge.name], null, null, [badge.size]]) }
+    }
+
+    return Promise.resolve({
+        json: () => Promise.resolve(json), // response content that was provided by the server as json format
+        ok: true, // whether the response was successful (status in the range 200-299) or not
+        status: 200, // HTTP status code from the server response
+        statusText: 'OK' // HTTP status message from the server response
+    })
+}
+
+const mockFechFailure = () => Promise.resolve({
+    json: () => Promise.resolve(), // response content that was provided by the server as json format
+    ok: false, // whether the response was successful (status in the range 200-299) or not
+    status: 404, // HTTP status code from the server response
+    statusText: 'Not Found' // HTTP status message from the server response
+})
+
 describe('SteamCardExchange#getBadges()', () => {
+    test('Throws "HTTP" error', () => {
+        fetchSpy.mockImplementationOnce(() => mockFechFailure())
+        expect(SteamCardExchange.getBadges()).rejects.toThrowError('HTTP-404 Not Found')
+    })
+
     test('Throws "Malformed Response" error', () => {
         const badges = null
-        axios.get.mockImplementation(() => mockAxiosGet(badges))
+        fetchSpy.mockImplementationOnce(() => mockFechSuccess(badges))
         expect(SteamCardExchange.getBadges()).rejects.toThrowError('Malformed response')
     })
 
     test('Get badges successfully', () => {
         const badges = { ...badgeA, ...badgeB }
-        axios.get.mockImplementation(() => mockAxiosGet(badges))
+        fetchSpy.mockImplementationOnce(() => mockFechSuccess(badges))
         expect(SteamCardExchange.getBadges()).resolves.toStrictEqual(badges)
     })
 
     test('Skip 0-size badges', () => {
         const badges = { ...badgeA, ...badgeC }
-        axios.get.mockImplementation(() => mockAxiosGet(badges))
+        fetchSpy.mockImplementationOnce(() => mockFechSuccess(badges))
         expect(SteamCardExchange.getBadges()).resolves.toStrictEqual(badgeA)
     })
 })
 
-const mockAxiosGet = (badges) => {
-    let body = {}
-    if (badges) {
-        body = { data: Object.entries(badges).map(([appid, badge]) => [[appid, badge.name], null, null, [badge.size]]) }
-    }
-
-    return {
-        data: body, // `data` is the response content that was provided by the server
-        status: 200, // `status` is the HTTP status code from the server response
-        statusText: 'OK' // `statusText` is the HTTP status message from the server response
-    }
-}
+// Runs after all the tests in this file have completed.
+afterAll(() => {
+    fetchSpy.mockRestore()
+})

package.json

@@ -20,7 +20,6 @@
     "npm": ">=9.0.0"
   },
   "dependencies": {
-    "axios": "1.6.8",
     "html-entities": "2.5.2",
     "winston": "3.12.0"
   },