Merge pull request #4186 from alphagov/fix-homepage_presenter-test

Convert homepage_presenter test to spec

spec/unit/presenters/homepage_presenter_spec.rb

@@ -0,0 +1,59 @@
+RSpec.describe HomepagePresenter do
+  let(:content_item) do
+    {
+      "links" => {
+        "popular_links" => [
+          {
+            "details" => {
+              "link_items" => [
+                {
+                  "title" => "Some title",
+                  "url" => "/some/path",
+                },
+              ],
+            },
+          },
+        ],
+      },
+    }
+  end
+
+  let(:subject) { described_class.new(content_item) }
+
+  context "#links" do
+    it "returns links" do
+      expect(subject.links).to eq(content_item["links"])
+    end
+  end
+
+  context "#popular_links" do
+    context "when popular links in the content item" do
+      it "memoizes popular links" do
+        expected_popular_links = subject.popular_links
+        content_item["links"].delete("popular_links")
+
+        expect(subject.popular_links).to eq(expected_popular_links)
+      end
+
+      it "returns popular links from the content item" do
+        expected_popular_links = content_item
+          .dig("links", "popular_links", 0, "details", "link_items")
+          .collect(&:with_indifferent_access)
+
+        expect(subject.popular_links).to eq(expected_popular_links)
+      end
+    end
+
+    context "when popular links not in the content item" do
+      before do
+        content_item["links"].delete("popular_links")
+      end
+
+      it "returns popular links from the locale file" do
+        expected_popular_links = I18n.t("homepage.index.popular_links")
+          .collect(&:with_indifferent_access)
+        expect(subject.popular_links).to eq(expected_popular_links)
+      end
+    end
+  end
+end