Add more unit tests and update integration tests

tests/unit/SignUpPage.spec.js

@@ -0,0 +1,23 @@
+import { expect } from 'chai'
+import { shallowMount, RouterLinkStub } from '@vue/test-utils'
+import SignUpPage from '@/pages/SignUpPage.vue'
+
+describe('SignUpPage.vue Component Test', () => {
+  let wrapper;
+  beforeEach(() => {
+    wrapper = shallowMount(SignUpPage, {
+      global: {
+        stubs: {
+          'router-link': RouterLinkStub
+        }
+      }
+    })
+  })
+
+  it('Mount test', async() => {
+    expect(wrapper.text()).to.include('Sign Up');
+    expect(wrapper.text()).to.include('Email Address');
+    expect(wrapper.text()).to.include('Password');
+    expect(wrapper.text()).to.include('Already have an account?');
+  })
+})