Initial setup GraphQL using graphql-ruby 1.8

- All definitions have been replaced by classes:
  http://graphql-ruby.org/schema/class_based_api.html
- Authorization & Presentation have been refactored to work in the
  class based system
- Loaders have been replaced by resolvers
- Times are now coersed as ISO 8601

2 files changed, 90 insertions, 0 deletions

diff --git a/spec/graphql/resolvers/merge_request_resolver_spec.rb b/spec/graphql/resolvers/merge_request_resolver_spec.rb
new file mode 100644
index 00000000000..af015533209
--- /dev/null
+++ b/spec/graphql/resolvers/merge_request_resolver_spec.rb
@@ -0,0 +1,58 @@
+require 'spec_helper'
+
+describe Resolvers::MergeRequestResolver do
+  include GraphqlHelpers
+
+  set(:project) { create(:project, :repository) }
+  set(:merge_request_1) { create(:merge_request, :simple, source_project: project, target_project: project) }
+  set(:merge_request_2) { create(:merge_request, :rebased, source_project: project, target_project: project) }
+
+  set(:other_project) { create(:project, :repository) }
+  set(:other_merge_request) { create(:merge_request, source_project: other_project, target_project: other_project) }
+
+  let(:full_path) { project.full_path }
+  let(:iid_1) { merge_request_1.iid }
+  let(:iid_2) { merge_request_2.iid }
+
+  let(:other_full_path) { other_project.full_path }
+  let(:other_iid) { other_merge_request.iid }
+
+  describe '#resolve' do
+    it 'batch-resolves merge requests by target project full path and IID' do
+      path = full_path # avoid database query
+
+      result = batch(max_queries: 2) do
+        [resolve_mr(path, iid_1), resolve_mr(path, iid_2)]
+      end
+
+      expect(result).to contain_exactly(merge_request_1, merge_request_2)
+    end
+
+    it 'can batch-resolve merge requests from different projects' do
+      path = project.full_path # avoid database queries
+      other_path = other_full_path
+
+      result = batch(max_queries: 3) do
+        [resolve_mr(path, iid_1), resolve_mr(path, iid_2), resolve_mr(other_path, other_iid)]
+      end
+
+      expect(result).to contain_exactly(merge_request_1, merge_request_2, other_merge_request)
+    end
+
+    it 'resolves an unknown iid to nil' do
+      result = batch { resolve_mr(full_path, -1) }
+
+      expect(result).to be_nil
+    end
+
+    it 'resolves a known iid for an unknown full_path to nil' do
+      result = batch { resolve_mr('unknown/project', iid_1) }
+
+      expect(result).to be_nil
+    end
+  end
+
+  def resolve_mr(full_path, iid)
+    resolve(described_class, args: { full_path: full_path, iid: iid })
+  end
+end
diff --git a/spec/graphql/resolvers/project_resolver_spec.rb b/spec/graphql/resolvers/project_resolver_spec.rb
new file mode 100644
index 00000000000..d4990c6492c
--- /dev/null
+++ b/spec/graphql/resolvers/project_resolver_spec.rb
@@ -0,0 +1,32 @@
+require 'spec_helper'
+
+describe Resolvers::ProjectResolver do
+  include GraphqlHelpers
+
+  set(:project1) { create(:project) }
+  set(:project2) { create(:project) }
+
+  set(:other_project) { create(:project) }
+
+  describe '#resolve' do
+    it 'batch-resolves projects by full path' do
+      paths = [project1.full_path, project2.full_path]
+
+      result = batch(max_queries: 1) do
+        paths.map { |path| resolve_project(path) }
+      end
+
+      expect(result).to contain_exactly(project1, project2)
+    end
+
+    it 'resolves an unknown full_path to nil' do
+      result = batch { resolve_project('unknown/project') }
+
+      expect(result).to be_nil
+    end
+  end
+
+  def resolve_project(full_path)
+    resolve(described_class, args: { full_path: full_path })
+  end
+end