OperationErrors now bubble up to the top of the API.

Added test functionality for node api
refactor TestRegister into class

test/tests/nodeApi/nodeApi.mjs

@@ -0,0 +1,63 @@
+/* eslint no-console: 0 */
+
+/**
+ * nodeApi.js
+ *
+ * Test node api utilities
+ *
+ * @author d98762625 [d98762625@gmail.com]
+ * @copyright Crown Copyright 2018
+ * @license Apache-2.0
+ */
+
+import assert from "assert";
+import it from "../assertionHandler";
+import chef from "../../../src/node/index";
+import TestRegister from "../../TestRegister";
+
+TestRegister.addApiTests([
+    it("should have some operations", () => {
+        assert(chef);
+        assert(chef.toBase32);
+        assert(chef.setUnion);
+        assert(!chef.randomFunction);
+    }),
+
+    it("should have an async/await api", async () => {
+        try {
+            const result = await chef.toBase32("input");
+            assert.notEqual("something", result);
+        } catch (e) {
+            // shouldnt reach here
+            assert(false);
+        }
+
+        try {
+            const fail = chef.setUnion("1");
+            // shouldnt get here
+            assert(false);
+        } catch (e) {
+            assert(true);
+        }
+    }),
+
+    it("should have a callback API", async () => {
+        await chef.toBase32("something", (err, result) => {
+            if (err) {
+                assert(false);
+            } else {
+                assert.equal("ONXW2ZLUNBUW4ZY=", result);
+            }
+        });
+    }),
+
+    it("should handle errors in callback API", async () => {
+        await chef.setUnion("1", (err, result) => {
+            if (err) {
+                assert(true);
+                return;
+            }
+            assert(false);
+        });
+    })
+]);