Add StringTools test

Signed-off-by: Ethan Lane <ethan@vylpes.com>

tests/helpers/StringTools.test.ts

@@ -0,0 +1,11 @@
+import StringTools from "../../src/helpers/StringTools";
+
+describe('Capitalise', () => {
+    test('Expect sentence to be captilised', () => {
+        const inputString = 'the big brown fox jumps over the lazy dog';
+
+        const result = StringTools.Capitalise(inputString);
+
+        expect(result).toBe('The Big Brown Fox Jumps Over The Lazy Dog');
+    });
+});