add hw2

src/s2-homeworks/hw02/tests/deleteAffair.test.tsx

@@ -0,0 +1,36 @@
+import React from 'react'
+import {AffairType, deleteAffair} from '../HW2'
+
+let initialState: AffairType[]
+
+beforeEach(() => {
+    initialState = [
+        {_id: 1, name: 'React', priority: 'high'},
+        {_id: 2, name: 'anime', priority: 'low'},
+        {_id: 3, name: 'games', priority: 'low'},
+        {_id: 4, name: 'work', priority: 'high'},
+        {_id: 5, name: 'html & css', priority: 'middle'},
+        {_id: 6, name: 'porn', priority: 'low'},
+    ]
+})
+
+test('delete 0', () => {
+    const newState = deleteAffair(initialState, 0)
+    expect(newState.length).toBe(6)
+})
+test('delete 1', () => {
+    const newState = deleteAffair(initialState, 1)
+    expect(newState.length).toBe(5)
+})
+test('delete 3', () => {
+    const newState = deleteAffair(initialState, 3)
+    expect(newState.length).toBe(5)
+})
+test('delete 6', () => {
+    const newState = deleteAffair(initialState, 6)
+    expect(newState.length).toBe(5)
+})
+test('delete 7', () => {
+    const newState = deleteAffair(initialState, 7)
+    expect(newState.length).toBe(6)
+})