first solution

5kyu/smallest-possible-sum/tests.ts

@@ -0,0 +1,8 @@
+// See https://www.chaijs.com for how to use Chai.
+import { assert } from "chai";
+
+import { solution } from "./solution";
+
+describe('Example test', function() {
+  it('[6,9,12]', () => assert.strictEqual(solution([6,9,21]),9));
+});