Add tests to the getOrdinalSuffix function

test/home-helpers.spec.js

+import { expect } from 'chai'
+
+import {getOrdinalSuffix } from '../components/helpers/home'
+
+describe('Home helper: getOrdinalSuffix', () => {
+  it('For 1, it returns suffix \'st\'', () => {
+    expect(getOrdinalSuffix(1)).to.eql('st')
+  })
+
+  it('For 2, it returns suffix \'nd\'', () => {
+    expect(getOrdinalSuffix(2)).to.eql('nd')
+  })
+
+  it('For 3, it returns suffix \'rd\'', () => {
+    expect(getOrdinalSuffix(3)).to.eql('rd')
+  })
+
+  it('For 11, it returns suffix \'th\'', () => {
+    expect(getOrdinalSuffix(11)).to.eql('th')
+  })
+
+  it('For 23, it returns suffix \'rd\'', () => {
+    expect(getOrdinalSuffix(23)).to.eql('rd')
+  })
+})