Centralise test setup - Closes #589

.eslintrc

@@ -43,7 +43,8 @@
       devDependencies: [
         "./src/**/*.test.js",
         "./features/*/*.js",
-        "./src/**/stories.js"
+        "./src/**/stories.js",
+        "./src/tests.js"
         ]
       }
     ],

src/tests.js

@@ -1,3 +1,12 @@
+import chai from 'chai';
+import sinonChai from 'sinon-chai';
+import chaiEnzyme from 'chai-enzyme';
+import chaiAsPromised from 'chai-as-promised';
+
+chai.use(sinonChai);
+chai.use(chaiEnzyme());
+chai.use(chaiAsPromised);
+
 // load all tests into one bundle
 const testsContext = require.context('.', true, /\.test\.js$/);
 testsContext.keys().forEach(testsContext);