test(looping-a-triangle): add test

Author: thebinaryfelix

src/chapters/chapter2/__tests__/looping-a-triangle.test.js

@@ -0,0 +1,9 @@
+import { loopATriangle } from '../looping-a-triangle'
+
+const expectedOutput = '#\n##\n###\n####\n#####\n'
+
+describe('loopATriangle', () => {
+ test('draws a triangle of given height', () => {
+ expect(loopATriangle(5)).toBe(expectedOutput)
+ })
+})