introduce test-suite sinon

Starting of introducing test-suite to project. Test-suite: sinon.
If this is a good choice, then the next step will be to introduce chai, and chai as Promise, followed by building out the tests.

.mocharc.js

@@ -0,0 +1,6 @@
+module.exports = {
+  require: [
+    './test/setup.spec.js',
+  ],
+  spec: './test/unit/**/*.js'
+};

.nycrc.json

@@ -0,0 +1,9 @@
+{
+  "check-coverage": true,
+  "extension": [
+    ".js"
+  ],
+  "include": [
+    "lambda/**/*"
+  ]
+}

package.json

@@ -25,7 +25,7 @@
     "execute": "bash execute.sh",
     "lint": "eslint --ignore-path .gitignore .",
     "test": "mocha",
-    "coverage": "nyc --reporter=lcov npm run test"
+    "coverage": "nyc --reporter=lcov --reporter=cobertura --reporter=text-summary mocha"
   },
   "dependencies": {},
   "devDependencies": {
@@ -36,6 +36,7 @@
     "eslint-config-strongloop": "^2.1.0",
     "expect.js": "^0.3.1",
     "mocha": "^6.2.2",
-    "nyc": "^14.1.1"
+    "nyc": "^14.1.1",
+    "sinon": "^9.0.2"
   }
 }

test/setup.spec.js

@@ -0,0 +1,12 @@
+'use strict';
+
+const sinon = require('sinon');
+
+// hide all logging for tests
+// comment out the line which
+// you would like to see logged
+// during test run
+sinon.stub(console, 'log');
+sinon.stub(console, 'info');
+sinon.stub(console, 'debug');
+sinon.stub(console, 'error');