update sdbm example and add 2 tests for sdbm and select

test/sdbm/sdbm.test.js

@@ -5,6 +5,7 @@ test('Testing sdbm', (t) => {
 	//For more information on all the methods supported by tape
 	//Please go to https://github.com/substack/tape
 	t.true(typeof sdbm === 'function', 'sdbm is a Function');
+	t.equal(sdbm('name'), -3521204949, "Hashes the input string into a whole number.");
 	//t.deepEqual(sdbm(args..), 'Expected');
 	//t.equal(sdbm(args..), 'Expected');
 	//t.false(sdbm(args..), 'Expected');