Add attachment_url to test case

Add a field for the attachment_url of a test case.

app/graphql/types/ci/test_case_type.rb

@@ -24,6 +24,9 @@ module Types
       field :file, GraphQL::STRING_TYPE, null: true,
         description: 'Path to the file of the test case.'
 
+      field :attachment_url, GraphQL::STRING_TYPE, null: true,
+        description: 'URL of the test case attachment file.'
+
       field :system_output, GraphQL::STRING_TYPE, null: true,
         description: 'System output of the test case.'
 

doc/api/graphql/reference/index.md

@@ -6212,6 +6212,7 @@ Test case in pipeline test report.
 
 | Field | Type | Description |
 | ----- | ---- | ----------- |
+| `attachmentUrl` | [`String`](#string) | URL of the test case attachment file. |
 | `classname` | [`String`](#string) | Classname of the test case. |
 | `executionTime` | [`Float`](#float) | Test case execution time in seconds. |
 | `file` | [`String`](#string) | Path to the file of the test case. |

spec/graphql/types/ci/test_case_type_spec.rb

@@ -7,7 +7,7 @@ RSpec.describe Types::Ci::TestCaseType do
 
   it 'contains attributes related to a pipeline test case' do
     expected_fields = %w[
-      name status classname file execution_time stack_Trace system_output recent_failures
+      name status classname file attachment_url execution_time stack_trace system_output recent_failures
     ]
 
     expect(described_class).to have_graphql_fields(*expected_fields)