chore: add cypress e2e tests, close #5

.travis.yml

@@ -10,6 +10,7 @@ install:
 
 script:
   - npm run test
+  - npm run cypress:run
 
 after_success:
   - npm run semantic-release

cypress.json

@@ -0,0 +1 @@
+{}

cypress/fixtures/example.json

@@ -0,0 +1,5 @@
+{
+  "name": "Using fixtures to represent data",
+  "email": "hello@cypress.io",
+  "body": "Fixtures are a great way to mock data for responses to routes"
+}

cypress/integration/spec.js

@@ -0,0 +1,25 @@
+/* eslint-env mocha */
+/* global cy */
+describe('@cypress/snapshot', () => {
+  beforeEach(() => {
+    cy.visit('https://example.cypress.io')
+  })
+
+  context('simple types', () => {
+    it('works with objects', () => {
+      cy.wrap({ foo: 42 }).snapshot()
+    })
+
+    it('works with numbers', () => {
+      cy.wrap(42).snapshot()
+    })
+
+    it('works with strings', () => {
+      cy.wrap('foo-bar').snapshot()
+    })
+
+    it('works with arrays', () => {
+      cy.wrap([1, 2, 3]).snapshot()
+    })
+  })
+})

cypress/plugins/index.js

@@ -0,0 +1,17 @@
+// ***********************************************************
+// This example plugins/index.js can be used to load plugins
+//
+// You can change the location of this file or turn off loading
+// the plugins file with the 'pluginsFile' configuration option.
+//
+// You can read more here:
+// https://on.cypress.io/plugins-guide
+// ***********************************************************
+
+// This function is called when a project is opened or re-opened (e.g. due to
+// the project's config changing)
+
+module.exports = (on, config) => {
+  // `on` is used to hook into various events Cypress emits
+  // `config` is the resolved Cypress config
+}

cypress/support/commands.js

@@ -0,0 +1,2 @@
+// register .snapshot() command
+require('../..')()

cypress/support/index.js

@@ -0,0 +1,20 @@
+// ***********************************************************
+// This example support/index.js is processed and
+// loaded automatically before your test files.
+//
+// This is a great place to put global configuration and
+// behavior that modifies Cypress.
+//
+// You can change the location of this file or turn off
+// automatically serving support files with the
+// 'supportFile' configuration option.
+//
+// You can read more here:
+// https://on.cypress.io/configuration
+// ***********************************************************
+
+// Import commands.js using ES2015 syntax:
+import './commands'
+
+// Alternatively you can use CommonJS syntax:
+// require('./commands')

package.json

@@ -64,7 +64,9 @@
     "unit": "mocha src/*-spec.js",
     "unused-deps": "dependency-check --unused --no-dev . --entry src/add-initial-snapshot-file.js",
     "postinstall": "node src/add-initial-snapshot-file.js",
-    "semantic-release": "semantic-release pre && npm publish --access public && semantic-release post"
+    "semantic-release": "semantic-release pre && npm publish --access public && semantic-release post",
+    "cypress:open": "cypress open",
+    "cypress:run": "cypress run"
   },
   "release": {
     "analyzeCommits": "simple-commit-message",
@@ -72,6 +74,7 @@
   },
   "devDependencies": {
     "ban-sensitive-files": "1.9.2",
+    "cypress": "1.1.4",
     "debug": "3.1.0",
     "dependency-check": "2.9.1",
     "deps-ok": "1.2.1",

snapshots.js

@@ -0,0 +1,25 @@
+module.exports = {
+  "@cypress/snapshot": {
+    "simple types": {
+      "works with objects": {
+        "1": {
+          "foo": 42
+        }
+      },
+      "works with numbers": {
+        "1": 42
+      },
+      "works with strings": {
+        "1": "foo-bar"
+      },
+      "works with arrays": {
+        "1": [
+          1,
+          2,
+          3
+        ]
+      }
+    }
+  },
+  "__version": "1.1.4"
+}