feat(auth): added utils to get and check login header

src/auth/spec/loginHeader.spec.ts

@@ -0,0 +1,82 @@
+/**
+ * @jest-environment jsdom
+ */
+
+import { ServerType } from '@sasjs/utils/types'
+import {
+  loginSuccessHeaders,
+  isLogInSuccessHeaderPresent,
+  defaultSuccessHeaderKey
+} from '../'
+
+describe('isLogInSuccessHeaderPresent', () => {
+  let languageGetter: any
+
+  beforeEach(() => {
+    languageGetter = jest.spyOn(window.navigator, 'language', 'get')
+  })
+
+  it('should check SASVIYA and SAS9 login success header based on language preferences of the browser', () => {
+    // test SASVIYA server type
+    Object.keys(loginSuccessHeaders).forEach((key) => {
+      languageGetter.mockReturnValue(key)
+
+      expect(
+        isLogInSuccessHeaderPresent(
+          ServerType.SasViya,
+          loginSuccessHeaders[key]
+        )
+      ).toBeTruthy()
+    })
+
+    // test SAS9 server type
+    Object.keys(loginSuccessHeaders).forEach((key) => {
+      languageGetter.mockReturnValue(key)
+
+      expect(
+        isLogInSuccessHeaderPresent(ServerType.Sas9, loginSuccessHeaders[key])
+      ).toBeTruthy()
+    })
+
+    // test possible longer language codes
+    const possibleLanguageCodes = [
+      { short: 'en', long: 'en-US' },
+      { short: 'fr', long: 'fr-FR' },
+      { short: 'es', long: 'es-ES' }
+    ]
+
+    possibleLanguageCodes.forEach((key) => {
+      const { short, long } = key
+      languageGetter.mockReturnValue(long)
+
+      expect(
+        isLogInSuccessHeaderPresent(
+          ServerType.SasViya,
+          loginSuccessHeaders[short]
+        )
+      ).toBeTruthy()
+    })
+
+    // test falling back to default language code
+    languageGetter.mockReturnValue('WRONG-LANGUAGE')
+
+    expect(
+      isLogInSuccessHeaderPresent(
+        ServerType.Sas9,
+        loginSuccessHeaders[defaultSuccessHeaderKey]
+      )
+    ).toBeTruthy()
+  })
+
+  it('should check SASVJS login success header', () => {
+    expect(
+      isLogInSuccessHeaderPresent(ServerType.Sasjs, { loggedIn: true })
+    ).toBeTruthy()
+
+    expect(
+      isLogInSuccessHeaderPresent(ServerType.Sasjs, { loggedIn: false })
+    ).toBeFalsy()
+
+    expect(isLogInSuccessHeaderPresent(ServerType.Sasjs, undefined)).toBeFalsy()
+  })
+})