Add e2e tests

tests/e2e/support/commands.js

@@ -0,0 +1,16 @@
+/**
+* Creates cy.seedAndVisit() function
+* This function will go to some path and wait for some fake response from 'src/tests/fixtures/*.json'
+* @param { String } seedData The name of json at 'src/tests/fixtures/
+* @param { String } path The path or query parameters to go -ex. '/?path=/api/users'
+* @param { String } method The fake request method
+*/
+Cypress.Commands.add('seedAndVisit', (seedData, path = '/', method = 'GET') => {
+  cy.server()
+    .route(method, 'https://api.thecatapi.com/', `fixture:${seedData}`).as(
+    'load'
+  )
+  cy.visit(path)
+    .get('#send').click()
+    .wait('@load')
+})

tests/e2e/support/index.js

@@ -0,0 +1 @@
+import './commands'