1 files changed, 37 insertions, 0 deletions
diff --git a/spec/graphql/resolvers/concerns/resolves_project_spec.rb b/spec/graphql/resolvers/concerns/resolves_project_spec.rb
new file mode 100644
index 00000000000..f29f54483d6
--- /dev/null
+++ b/spec/graphql/resolvers/concerns/resolves_project_spec.rb
@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe ResolvesProject do
+  include GraphqlHelpers
+
+  let(:implementing_class) do
+    Class.new do
+      include ResolvesProject
+    end
+  end
+
+  subject(:instance) { implementing_class.new }
+
+  let_it_be(:project) { create(:project) }
+
+  it 'can resolve projects by path' do
+    expect(sync(instance.resolve_project(full_path: project.full_path))).to eq(project)
+  end
+
+  it 'can resolve projects by id' do
+    expect(sync(instance.resolve_project(project_id: global_id_of(project)))).to eq(project)
+  end
+
+  it 'complains when both are present' do
+    expect do
+      instance.resolve_project(full_path: project.full_path, project_id: global_id_of(project))
+    end.to raise_error(::Gitlab::Graphql::Errors::ArgumentError)
+  end
+
+  it 'complains when neither is present' do
+    expect do
+      instance.resolve_project(full_path: nil, project_id: nil)
+    end.to raise_error(::Gitlab::Graphql::Errors::ArgumentError)
+  end
+end