Add MultilineTextField formatting tests and escape block quote markers

src/server/plugins/engine/components/helpers/components.test.ts

@@ -4,6 +4,7 @@ import {
   type EastingNorthingFieldComponent,
   type GeospatialFieldComponent,
   type LatLongFieldComponent,
+  type MultilineTextFieldComponent,
   type NationalGridFieldNumberFieldComponent,
   type OsGridRefFieldComponent
 } from '@defra/forms-model'
@@ -18,6 +19,7 @@ import {
   EastingNorthingField,
   GeospatialField,
   LatLongField,
+  MultilineTextField,
   NationalGridFieldNumberField,
   OsGridRefField
 } from '~/src/server/plugins/engine/components/index.js'
@@ -442,3 +444,37 @@ describe('Location field formatting', () => {
     })
   })
 })
+
+describe('MultilineTextField formatting', () => {
+  let field: MultilineTextField
+
+  beforeEach(() => {
+    const model = new FormModel(definition, {
+      basePath: 'test'
+    })
+
+    const def: MultilineTextFieldComponent = {
+      type: ComponentType.MultilineTextField,
+      name: 'myComponent',
+      title: 'Your answer',
+      options: {},
+      schema: {}
+    }
+
+    field = new MultilineTextField(def, { model })
+  })
+
+  it('escapes block quote markers in the check answers summary', () => {
+    const state = { myComponent: '> first\r\n>\r\n> second' }
+
+    const answer = getAnswer(field, state, translator, { format: 'summary' })
+    expect(answer).toBe('&gt; first<br>&gt;<br>&gt; second<br>')
+  })
+
+  it('escapes block quote markers in emails', () => {
+    const state = { myComponent: '> first\r\n>\r\n> second' }
+
+    const answer = getAnswer(field, state, translator, { format: 'email' })
+    expect(answer).toBe('\\> first\n\\>\n\\> second\n')
+  })
+})

src/server/plugins/engine/components/helpers/index.ts

@@ -21,6 +21,7 @@ export function escapeMarkdown(answer: string) {
     '(',
     ')',
     '#',
+    '>',
     '+',
     '-',
     '.',