Updated the test system

test/fromCamelCase.test.js

@@ -0,0 +1,17 @@
+const expect = require('expect');
+const {fromCamelCase} = require('./_30s.js');
+
+test('fromCamelCase is a Function', () => {
+  expect(fromCamelCase).toBeInstanceOf(Function);
+});
+test('Converts a string from camelcase', () => {
+  expect(fromCamelCase('someDatabaseFieldName', ' ')).toBe('some database field name');
+});
+test('Converts a string from camelcase', () => {
+  expect(fromCamelCase('someLabelThatNeedsToBeCamelized', '-')).toBe(
+    'some-label-that-needs-to-be-camelized'
+  );
+});
+test('Converts a string from camelcase', () => {
+  expect(fromCamelCase('someJavascriptProperty', '_')).toBe('some_javascript_property');
+});