add login slice test

src/features/AuthByUsername/model/slice/loginSlice.test.ts

@@ -0,0 +1,19 @@
+import { ILoginSchema } from '../types/loginSchema';
+import { loginActions, loginReducer } from './loginSlice';
+import { DeepPartial } from '@reduxjs/toolkit';
+
+describe( 'loginSlice test', () => {
+    test( 'login slice set username reducer', () => {
+        const state: DeepPartial<ILoginSchema> = {
+            username: '123',
+        };
+        expect( loginReducer( state as ILoginSchema, loginActions.setUsername( 'bera' ) ) ).toEqual( { username: 'bera' } );
+    } );
+
+    test( 'login slice set password reducer', () => {
+        const state: DeepPartial<ILoginSchema> = {
+            password: '123',
+        };
+        expect( loginReducer( state as ILoginSchema, loginActions.setPassword( 'password' ) ) ).toEqual( { password: 'password' } );
+    } );
+} );