Add tests for Home Page

cypress/integration/home.spec.js

+/**
+ * Copyright (C) 2019  The Software Heritage developers
+ * See the AUTHORS file at the top-level directory of this distribution
+ * License: GNU Affero General Public License version 3, or any later version
+ * See top-level LICENSE file for more information
+ */
+
+const url = '/';
+
+const $ = Cypress.$;
+
+describe('Home Page Tests', function() {
+  it('should display positive stats for each category', function() {
+    cy.visit(url);
+    cy.get('.swh-counter')
+      .then((counters) => {
+        for(let counter of counters) {
+          let innerText = $(counter).text();
+          const value = parseInt(innerText.replace(/,/g, ''));
+          assert.isAbove(value, 0);
+        }
+      });
+  })
+})