Add an "export wins have now moved" banner to company export tab

src/client/components/CompanyLocalHeader/index.jsx

@@ -119,9 +119,27 @@ const hasAllocatedLeadIta = (company) =>
 const hasManagedAccountDetails = (company) =>
   company.oneListGroupTier && hasAllocatedLeadIta(company)
 
+const DATA_HUB_HAS_MOVED_LINK =
+  'https://data-services-help.trade.gov.uk/data-hub/updates/announcements/export-wins-has-moved-to-data-hub/'
+
+const DATA_HUB_HAS_MOVED_MESSAGE = (
+  <>
+    Historic export wins have now moved to Data Hub,{' '}
+    <Link
+      href={DATA_HUB_HAS_MOVED_LINK}
+      target="_blank"
+      rel="noopener noreferrer"
+      aria-label="See the export wins announcement"
+    >
+      see the export wins announcement
+    </Link>
+    .
+  </>
+)
+
 const CompanyLocalHeader = ({
   breadcrumbs,
-  flashMessages,
+  flashMessages = [],
   company,
   csrfToken,
 }) =>
@@ -133,7 +151,11 @@ const CompanyLocalHeader = ({
           company.id,
           company.name
         )}
-        flashMessages={flashMessages}
+        flashMessages={
+          breadcrumbs[0]?.text === 'Exports'
+            ? [[DATA_HUB_HAS_MOVED_MESSAGE, ...flashMessages]]
+            : flashMessages
+        }
       >
         <GridRow>
           <GridCol setWidth="two-thirds">

test/functional/cypress/specs/companies/export-wins-moved-spec.js

@@ -0,0 +1,45 @@
+const { company } = require('../../fixtures')
+const urls = require('../../../../../src/lib/urls')
+
+describe('Export wins moved banner', () => {
+  it('There should be a banner informing about export wins moving to Data Hub on the company page', () => {
+    cy.visit(urls.companies.exports.index(company.dnbCorp.id))
+
+    cy.get('[data-test="status-message"')
+      .should(
+        'have.text',
+        'Historic export wins have now moved to Data Hub, see the export wins announcement.'
+      )
+      .within(() => {
+        cy.contains('a', 'see the export wins announcement').should(
+          'have.attr',
+          'href',
+          'https://data-services-help.trade.gov.uk/data-hub/updates/announcements/export-wins-has-moved-to-data-hub/'
+        )
+      })
+  })
+
+  describe("There should't be a banner in the other tabs", () => {
+    ;[
+      'overview',
+      'activity',
+      'business-details',
+      'contacts',
+      'account-management',
+      'investments/projects',
+      'orders',
+    ].forEach((slug) =>
+      it(slug, () => {
+        cy.visit(`/companies/${company.dnbCorp.id}/${slug}`)
+
+        // We need to wait for company name appear...
+        cy.contains(company.dnbCorp.name)
+
+        // ...so that this waits for whent the data has been loaded and rendered
+        cy.contains('Historic export wins have now moved to Data Hub').should(
+          'not.exist'
+        )
+      })
+    )
+  })
+})