From ca62d8c1a8a9bbd791502c0d47aed2515cab239b Mon Sep 17 00:00:00 2001
From: Richard Towers <richard.towers@digital.cabinet-office.gov.uk>
Date: Wed, 6 Nov 2024 15:31:09 +0000
Subject: [PATCH] Add tests for landing page presenter expanding images

---
 .../publishing_api/landing_page_presenter.rb  |   7 +-
 .../landing_page_presenter_test.rb            | 101 ++++++++++++++++++
 2 files changed, 106 insertions(+), 2 deletions(-)

diff --git a/app/presenters/publishing_api/landing_page_presenter.rb b/app/presenters/publishing_api/landing_page_presenter.rb
index 02aa3f9da3c..7ba1527c1d7 100644
--- a/app/presenters/publishing_api/landing_page_presenter.rb
+++ b/app/presenters/publishing_api/landing_page_presenter.rb
@@ -99,8 +99,11 @@ def present_image(image, pattern)
     end
 
     def present_image_versions(image)
-      image.image_data.image_kind_config.versions.to_h do |v|
-        [v.name, image.url(v.name)]
+      image.image_data.image_kind_config.versions.map do |v|
+        {
+          name: v.name,
+          url: image.url(v.name),
+        }
       end
     end
   end
diff --git a/test/unit/app/presenters/publishing_api/landing_page_presenter_test.rb b/test/unit/app/presenters/publishing_api/landing_page_presenter_test.rb
index 49c81898f0c..ca34192f751 100644
--- a/test/unit/app/presenters/publishing_api/landing_page_presenter_test.rb
+++ b/test/unit/app/presenters/publishing_api/landing_page_presenter_test.rb
@@ -117,4 +117,105 @@ class PublishingApi::LandingPagePresenterTest < ActiveSupport::TestCase
 
     assert_equal expected_details, presented_content[:details].deep_stringify_keys
   end
+
+  test "it recursively expands images in the body" do
+    body = <<~YAML
+      blocks:
+      - type: hero
+        image:
+          sources:
+          - "[Image: big-cheese.960x640.jpg]"
+          - "[Image: minister-of-funk.960x640.jpg]"
+      - type: grid_container
+        blocks:
+        - type: hero
+          image:
+            sources:
+            - "[Image: big-cheese.960x640.jpg]"
+    YAML
+
+    landing_page = create(
+      :landing_page,
+      document: create(:document, id: 12_346, slug: "/landing-page/with-images"),
+      body:,
+      title: "Landing Page title",
+      summary: "Landing Page summary",
+      first_published_at: @first_published_at = Time.zone.now,
+      updated_at: 1.year.ago,
+      images: [
+        build(:image, image_data: build(:image_data, file: upload_fixture("big-cheese.960x640.jpg", "image/jpg"))),
+        build(:image, image_data: build(:image_data, file: upload_fixture("minister-of-funk.960x640.jpg", "image/jpg"))),
+      ],
+    )
+
+    presented_landing_page = PublishingApi::LandingPagePresenter.new(landing_page)
+    presented_content = I18n.with_locale("en") { presented_landing_page.content }
+
+    assert_pattern do
+      presented_content[:details].deep_symbolize_keys => {
+      blocks: [
+        {
+          type: "hero",
+          image: {
+            sources: [
+              { id: "big-cheese.960x640.jpg", image_kind: "default", versions: Array },
+              { id: "minister-of-funk.960x640.jpg", image_kind: "default", versions: Array },
+            ]
+          }
+        },
+        {
+          type: "grid_container",
+          blocks: [{
+            type: "hero",
+            image: {
+              sources: [
+                { id: "big-cheese.960x640.jpg", image_kind: "default", versions: Array },
+              ]
+            }
+          }],
+        },
+      ]}
+    end
+  end
+
+  test "it presents errors if files are not found" do
+    body = <<~YAML
+      blocks:
+      - type: hero
+        image:
+          sources:
+          - "[Image: non-existent-file.jpg]"
+    YAML
+
+    landing_page = create(
+      :landing_page,
+      document: create(:document, id: 12_346, slug: "/landing-page/with-images"),
+      body:,
+      title: "Landing Page title",
+      summary: "Landing Page summary",
+      first_published_at: @first_published_at = Time.zone.now,
+      updated_at: 1.year.ago,
+      images: [],
+    )
+
+    presented_landing_page = PublishingApi::LandingPagePresenter.new(landing_page)
+    presented_content = I18n.with_locale("en") { presented_landing_page.content }
+    details = presented_content[:details].deep_symbolize_keys
+
+    assert_pattern do
+      details =>
+      {
+        blocks: [
+          {
+            type: "hero",
+            image: {
+              sources: [
+                { errors: ["Image not found for pattern [Image: non-existent-file.jpg]"] },
+              ]
+            }
+          },
+        ],
+      }
+    end
+  end
 end