Add capitalize() method to base presenter

app/presenters/base.presenter.js

@@ -1,5 +1,26 @@
 'use strict'
 
+/**
+ * Capitalize the first letter of each word in a string
+ *
+ * Will work for strings containing multiple words or only one.
+ *
+ * @param {string} value The string to capitalize
+ *
+ * @returns {string} The capitalized string
+ */
+function capitalize (value) {
+  const words = value.split(' ')
+  const capitalizedWords = []
+
+  words.forEach((word) => {
+    const capitalizedWord = word.charAt(0).toUpperCase() + word.slice(1)
+    capitalizedWords.push(capitalizedWord)
+  })
+
+  return capitalizedWords.join(' ')
+}
+
 /**
  * Converts a number which represents pence into pounds by dividing it by 100
  *
@@ -123,6 +144,7 @@ function leftPadZeroes (number, length) {
 }
 
 module.exports = {
+  capitalize,
   convertPenceToPounds,
   formatAbstractionDate,
   formatAbstractionPeriod,

test/presenters/base.presenter.test.js

@@ -11,6 +11,58 @@ const { expect } = Code
 const BasePresenter = require('../../app/presenters/base.presenter.js')
 
 describe('Base presenter', () => {
+  describe('#capitalize()', () => {
+    let valueToCapitalize
+
+    describe('when the value is a single word', () => {
+      beforeEach(() => {
+        valueToCapitalize = 'high'
+      })
+
+      it('correctly returns the value capitalized, for example, High', async () => {
+        const result = BasePresenter.capitalize(valueToCapitalize)
+
+        expect(result).to.equal('High')
+      })
+    })
+
+    describe('when the value is multiple words', () => {
+      beforeEach(() => {
+        valueToCapitalize = 'spray irrigation'
+      })
+
+      it('correctly returns the value capitalized, for example, Spray Irrigation', async () => {
+        const result = BasePresenter.capitalize(valueToCapitalize)
+
+        expect(result).to.equal('Spray Irrigation')
+      })
+    })
+
+    describe('when the value contains a symbol', () => {
+      beforeEach(() => {
+        valueToCapitalize = 'spray irrigation - direct'
+      })
+
+      it('correctly returns the value capitalized, for example, Spray Irrigation - Direct', async () => {
+        const result = BasePresenter.capitalize(valueToCapitalize)
+
+        expect(result).to.equal('Spray Irrigation - Direct')
+      })
+    })
+
+    describe('when the value is all capitals', () => {
+      beforeEach(() => {
+        valueToCapitalize = 'SPRAY IRRIGATION'
+      })
+
+      it('correctly returns the value unchanged, for example, SPRAY IRRIGATION', async () => {
+        const result = BasePresenter.capitalize(valueToCapitalize)
+
+        expect(result).to.equal('SPRAY IRRIGATION')
+      })
+    })
+  })
+
   describe('#convertPenceToPounds()', () => {
     let valueInPence