Renable test/contracts/govuk_content_schemas_test.rb

There was a typo in the support file, such that
GovukSchemas::Example.find_all(supported_schemas) was returning []
because the `find_all` method expects a single string param.
https://github.com/alphagov/govuk_schemas/blob/4fef0aa95be24c3534a00b622a59ea7f1e8175fa/lib/govuk_schemas/example.rb#L5

Also removes redirect, as there is no frontend rendering.
https://github.com/alphagov/publishing-api/tree/main/content_schemas/examples/redirect

Minitest won't not run tests of the same name, and multiple schema examples have
the same basepath. Hence adding in the index to the iterator.

test/contracts/govuk_content_schemas_test.rb

@@ -3,9 +3,10 @@
 class GovukContentSchemasTest < ActionDispatch::IntegrationTest
   include GovukContentSchemaExamples
 
-  all_examples_for_supported_schemas.each do |content_item|
-    test "can successfully render #{content_item['base_path']} schema example" do
+  all_examples_for_supported_schemas.each_with_index do |content_item, index|
+    test "can successfully render #{content_item['document_type']} #{index} example" do
       stub_content_store_has_item(content_item["base_path"], content_item)
+      stub_parent_breadcrumbs(content_item, content_item["document_type"])
 
       get content_item["base_path"]
 

test/support/govuk_content_schema_examples.rb

@@ -29,17 +29,23 @@ def govuk_content_schema_example(schema_name, example_name)
     GovukSchemas::Example.find(schema_name, example_name:)
   end
 
+  def stub_parent_breadcrumbs(document, schema)
+    parents = document.dig("links", "parent")
+    return if parents.nil?
+
+    stub_content_store_has_item(parents.first["base_path"], document) if schema == "html_publication"
+  end
+
   module ClassMethods
     def all_examples_for_supported_schemas
-      GovukSchemas::Example.find_all(supported_schemas)
+      supported_schemas.flat_map { |format| GovukSchemas::Example.find_all(format) }
     end
 
     def supported_schemas
       %w[
         case_study
         coming_soon
         html_publication
-        redirect
         statistics_announcement
         take_part
         topical_event_about_page