test: add spec for path shim

tests/spec/shims/path.spec.js

@@ -0,0 +1,14 @@
+'use strict';
+const expect = require('chai').expect;
+const path = require('../../../shims/path').default;
+const pathActual = require('../../../src/index').path;
+
+describe.only('path shim', () => {
+  it('should be defined', () => {
+    expect(path).to.not.be.undefined;
+  });
+
+  it('should be re-exposing path', () => {
+    expect(path).to.equal(pathActual);
+  });
+});