Add action handler tests

cypress/integration/tests/action-handler.cy.tsx

@@ -0,0 +1,18 @@
+describe('Action handler page should redirect visitor to', () => {
+  const ACTION_HANDLER_URL = '/action-handler?mode=';
+  const MODE_VALUE = 'resetPassword';
+
+  before(() => {
+    cy.cleanUpTestState();
+  });
+
+  it('reset password page if mode query parameter is resetPassword', () => {
+    cy.visit(`${ACTION_HANDLER_URL}${MODE_VALUE}`);
+    cy.checkPageUrl('auth/reset-password');
+  });
+  it('not found page if mode query parameters has other value', () => {
+    const modeValue = 'wrongMode';
+    cy.visit(`${ACTION_HANDLER_URL}${modeValue}`);
+    cy.checkPageUrl('404');
+  });
+});