OperationErrors now bubble up to the top of the API.

Added test functionality for node api
refactor TestRegister into class

test/tests/assertionHandler.mjs

@@ -0,0 +1,45 @@
+/**
+ * assertionHandler.mjs
+ *
+ * Pair native node assertions with a description for
+ * the benefit of the TestRegister.
+ *
+ * @author d98762625 [d98762625@gmail.com]
+ * @copyright Crown Copyright 2018
+ * @license Apache-2.0
+ */
+
+import assert from "assert";
+
+/**
+ * it - wrapper for assertions to provide a helpful description
+ * to the TestRegister
+ * @param {String} description - The description of the test
+ * @param {Function} assertion - The test
+ *
+ * @example
+ * // One assertion
+ * it("should run one assertion", () => assert.equal(1,1))
+ *
+ * @example
+ * // multiple assertions
+ * it("should handle multiple assertions", () => {
+ *   assert.equal(1,1)
+ *   assert.notEqual(3,4)
+ * })
+ * 
+ * @example
+ * // async assertions
+ * it("should handle async", async () => {
+ *      let r = await asyncFunc()
+ *      assert(r)
+ * })
+ */
+export function it(name, run) {
+    return {
+        name,
+        run
+    };
+}
+
+export default it;