Add tests using Jest

Author: 12joan

jest.config.mjs

@@ -0,0 +1,5 @@
+export default {
+  clearMocks: true,
+  preset: 'ts-jest',
+  testEnvironment: "jsdom",
+}

package.json

@@ -7,21 +7,26 @@
     "dev": "vite",
     "build": "tsc && vite build",
     "preview": "vite preview",
-    "tauri": "tauri"
+    "tauri": "tauri",
+    "test": "jest"
   },
   "dependencies": {
     "@tauri-apps/api": "^1.2.0",
     "preact": "^10.11.3"
   },
   "devDependencies": {
-    "@babel/core": "^7.12.10",
+    "@babel/core": "^7.20.12",
     "@preact/preset-vite": "^2.4.0",
     "@tauri-apps/cli": "^1.2.2",
+    "@types/jest": "^29.4.0",
     "@types/node": "^18.7.14",
     "autoprefixer": "^10.4.13",
+    "jest": "^29.4.3",
+    "jest-environment-jsdom": "^29.4.3",
     "postcss": "^8.4.21",
     "sass": "^1.58.0",
     "tailwindcss": "^3.2.6",
+    "ts-jest": "^29.0.5",
     "typescript": "^4.6.4",
     "vite": "^4.0.0"
   }

src/utils/pingData.spec.ts

@@ -0,0 +1,29 @@
+import {
+  makePingDataSuccess,
+  makePingDataTimeout,
+  parsePingData,
+} from './pingData'
+
+describe('parsePingData', () => {
+  it('returns null for boilerplate lines', () => {
+    [
+      'PING 1.1.1.1 (1.1.1.1): 56 data bytes',
+      '',
+      '--- 1.1.1.1 ping statistics ---',
+      '3 packets transmitted, 3 packets received, 0.0% packet loss',
+      'round-trip min/avg/max/stddev = 18.643/26.401/32.371/5.745 ms',
+    ].forEach((line) => {
+      expect(parsePingData(line)).toBeNull()
+    })
+  })
+
+  it('parses successful ping lines', () => {
+    const line = '64 bytes from 1.1.1.1: icmp_seq=0 ttl=55 time=28.190 ms'
+    expect(parsePingData(line)).toEqual(makePingDataSuccess(28.19))
+  })
+
+  it('parses timeout ping lines', () => {
+    const line = 'Request timeout for icmp_seq 0'
+    expect(parsePingData(line)).toEqual(makePingDataTimeout())
+  })
+})