add more tests (#26)

* added more tests

* (fix) no cpu profile.

__tests__/functions/CreateResultTable.js

@@ -0,0 +1,9 @@
+require('module-alias/register');
+
+const { CreateResultTable, f } = require('@dsabot/CreateResultTable');
+
+it('turn any number into a string', () => {
+    expect(f(2)).toBe('+2');
+    expect(f(0)).toBe('0');
+    expect(f(-1)).toBe('-1');
+});