Fix test and handle errors better

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/tests/e2e/specs/register.js

@@ -65,7 +65,7 @@ describe('Registration', () => {
       expect(loc.pathname).to.eq('/');
     });
 
-    cy.contains('.navbar-link', 'tester');
+    cy.get('.navbar-link span.icon i').should('have.class', 'mdi-account-circle');
     cy.contains('article.message.is-info', 'Welcome back tester account');
   });
 });