GraphQL mutations for add, remove and toggle emoji

Adding new `AddAwardEmoji`, `RemoveAwardEmoji` and `ToggleAwardEmoji`
GraphQL mutations.

Adding new `#authorized_find_with_pre_checks!` and (unused, but for
completeness `#authorized_find_with_post_checks!`) authorization
methods. These allow us to perform an authorized find, and run our own
additional checks before or after the authorization runs.

https://gitlab.com/gitlab-org/gitlab-ce/issues/62826

2 files changed, 35 insertions, 4 deletions

diff --git a/spec/support/helpers/graphql_helpers.rb b/spec/support/helpers/graphql_helpers.rb
index bcf6669f37d..1a09d48f4cd 100644
--- a/spec/support/helpers/graphql_helpers.rb
+++ b/spec/support/helpers/graphql_helpers.rb
@@ -4,10 +4,7 @@ module GraphqlHelpers
   # makes an underscored string look like a fieldname
   # "merge_request" => "mergeRequest"
   def self.fieldnamerize(underscored_field_name)
-    graphql_field_name = underscored_field_name.to_s.camelize
-    graphql_field_name[0] = graphql_field_name[0].downcase
-
-    graphql_field_name
+    underscored_field_name.to_s.camelize(:lower)
   end
 
   # Run a loader's named resolver
diff --git a/spec/support/shared_examples/graphql/mutation_shared_examples.rb b/spec/support/shared_examples/graphql/mutation_shared_examples.rb
new file mode 100644
index 00000000000..022d41c0bdd
--- /dev/null
+++ b/spec/support/shared_examples/graphql/mutation_shared_examples.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+# Shared example for expecting top-level errors.
+# See https://graphql-ruby.org/mutations/mutation_errors#raising-errors
+#
+#   { errors: [] }
+#
+# There must be a method or let called `mutation` defined that executes
+# the mutation.
+RSpec.shared_examples 'a mutation that returns top-level errors' do |errors:|
+  it do
+    post_graphql_mutation(mutation, current_user: current_user)
+
+    error_messages = graphql_errors.map { |e| e['message'] }
+
+    expect(error_messages).to eq(errors)
+  end
+end
+
+# Shared example for expecting schema-level errors.
+# See https://graphql-ruby.org/mutations/mutation_errors#errors-as-data
+#
+#   { data: { mutationName: { errors: [] } } }
+#
+# There must be:
+# - a method or let called `mutation` defined that executes the mutation
+# - a `mutation_response` method defined that returns the data of the mutation response.
+RSpec.shared_examples 'a mutation that returns errors in the response' do |errors:|
+  it do
+    post_graphql_mutation(mutation, current_user: current_user)
+
+    expect(mutation_response['errors']).to eq(errors)
+  end
+end