Added Example Component and testing framework

Signed-off-by: Avior <florian.bouillon@delta-wings.net>

__tests__/components/HelloWorld.test.tsx

@@ -0,0 +1,14 @@
+import React from 'react'
+import renderer from 'react-test-renderer'
+import HelloWorld from '../../components/HelloWorld'
+
+/**
+ * Example Test
+ *
+ * on first run it will generate a .snap file and after will compare result with it
+ */
+
+it('render a h1', () => {
+	const tree = renderer.create((<HelloWorld>Test</HelloWorld>)).toJSON()
+	expect(tree).toMatchSnapshot()
+})

__tests__/components/__snapshots__/HelloWorld.test.tsx.snap

@@ -0,0 +1,9 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`render a h1 1`] = `
+<h1
+  className="jsx-3954099876"
+>
+  Test
+</h1>
+`;