Replace echo function with a resolver

The `GraphQL::Function` has been deprecated in
favor of resolvers.

4 files changed, 15 insertions, 22 deletions

diff --git a/app/graphql/functions/base_function.rb b/app/graphql/functions/base_function.rb
deleted file mode 100644
index 2512ecbd255..00000000000
--- a/app/graphql/functions/base_function.rb
+++ /dev/null
@@ -1,6 +0,0 @@
-# frozen_string_literal: true
-
-module Functions
-  class BaseFunction < GraphQL::Function
-  end
-end
diff --git a/app/graphql/functions/echo.rb b/app/graphql/functions/echo.rb
deleted file mode 100644
index 3104486faac..00000000000
--- a/app/graphql/functions/echo.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Functions
-  class Echo < BaseFunction
-    argument :text, GraphQL::STRING_TYPE
-
-    description "Testing endpoint to validate the API with"
-
-    def call(obj, args, ctx)
-      username = ctx[:current_user]&.username
-
-      "#{username.inspect} says: #{args[:text]}"
-    end
-  end
-end
diff --git a/app/graphql/resolvers/echo_resolver.rb b/app/graphql/resolvers/echo_resolver.rb
new file mode 100644
index 00000000000..8076e1784ce
--- /dev/null
+++ b/app/graphql/resolvers/echo_resolver.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+module Resolvers
+  class EchoResolver < BaseResolver
+    argument    :text, GraphQL::STRING_TYPE, required: true
+    description 'Testing endpoint to validate the API with'
+
+    def resolve(**args)
+      username = context[:current_user]&.username
+
+      "#{username.inspect} says: #{args[:text]}"
+    end
+  end
+end
diff --git a/app/graphql/types/query_type.rb b/app/graphql/types/query_type.rb
index 53d36b43576..c686300b25d 100644
--- a/app/graphql/types/query_type.rb
+++ b/app/graphql/types/query_type.rb
@@ -24,6 +24,6 @@ module Types
           resolver: Resolvers::MetadataResolver,
           description: 'Metadata about GitLab'
 
-    field :echo, GraphQL::STRING_TYPE, null: false, function: Functions::Echo.new
+    field :echo, GraphQL::STRING_TYPE, null: false, resolver: Resolvers::EchoResolver
   end
 end