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- All definitions have been replaced by classes: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- Loaders have been replaced by resolvers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

3 files changed, 59 insertions, 22 deletions

diff --git a/spec/support/helpers/graphql_helpers.rb b/spec/support/helpers/graphql_helpers.rb
index ae29b16e32c..30ff9a1196a 100644
--- a/spec/support/helpers/graphql_helpers.rb
+++ b/spec/support/helpers/graphql_helpers.rb
@@ -1,7 +1,16 @@
 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
+  end
+
   # Run a loader's named resolver
-  def resolve(kls, name, obj: nil, args: {}, ctx: {})
-    kls[name].call(obj, args, ctx)
+  def resolve(resolver_class, obj: nil, args: {}, ctx: {})
+    resolver_class.new(object: obj, context: ctx).resolve(args)
   end
 
   # Runs a block inside a BatchLoader::Executor wrapper
@@ -24,8 +33,20 @@ module GraphqlHelpers
     end
   end
 
-  def all_graphql_fields_for(klass)
-    type = GitlabSchema.types[klass.name]
+  def graphql_query_for(name, attributes = {}, fields = nil)
+    fields ||= all_graphql_fields_for(name.classify)
+    attributes = attributes_to_graphql(attributes)
+    <<~QUERY
+    {
+      #{name}(#{attributes}) {
+        #{fields}
+      }
+    }
+    QUERY
+  end
+
+  def all_graphql_fields_for(class_name)
+    type = GitlabSchema.types[class_name.to_s]
     return "" unless type
 
     type.fields.map do |name, field|
@@ -37,8 +58,22 @@ module GraphqlHelpers
     end.join("\n")
   end
 
-  def post_graphql(query)
-    post '/api/graphql', query: query
+  def attributes_to_graphql(attributes)
+    attributes.map do |name, value|
+      "#{GraphqlHelpers.fieldnamerize(name.to_s)}: \"#{value}\""
+    end.join(", ")
+  end
+
+  def post_graphql(query, current_user: nil)
+    post api('/', current_user, version: 'graphql'), query: query
+  end
+
+  def graphql_data
+    json_response['data']
+  end
+
+  def graphql_errors
+    json_response['data']
   end
 
   def scalar?(field)
diff --git a/spec/support/matchers/graphql_matchers.rb b/spec/support/matchers/graphql_matchers.rb
index c0ed16ecaba..ba7a1c8cde0 100644
--- a/spec/support/matchers/graphql_matchers.rb
+++ b/spec/support/matchers/graphql_matchers.rb
@@ -1,31 +1,40 @@
 RSpec::Matchers.define :require_graphql_authorizations do |*expected|
   match do |field|
-    authorizations = field.metadata[:authorize]
-
-    expect(authorizations).to contain_exactly(*expected)
+    field_definition = field.metadata[:type_class]
+    expect(field_definition).to respond_to(:required_permissions)
+    expect(field_definition.required_permissions).to contain_exactly(*expected)
   end
 end
 
 RSpec::Matchers.define :have_graphql_fields do |*expected|
   match do |kls|
-    expect(kls.fields.keys).to contain_exactly(*expected.map(&:to_s))
+    field_names = expected.map { |name| GraphqlHelpers.fieldnamerize(name) }
+    expect(kls.fields.keys).to contain_exactly(*field_names)
   end
 end
 
 RSpec::Matchers.define :have_graphql_arguments do |*expected|
+  include GraphqlHelpers
+
   match do |field|
-    expect(field.arguments.keys).to contain_exactly(*expected.map(&:to_s))
+    argument_names = expected.map { |name| GraphqlHelpers.fieldnamerize(name) }
+    expect(field.arguments.keys).to contain_exactly(*argument_names)
   end
 end
 
 RSpec::Matchers.define :have_graphql_type do |expected|
   match do |field|
-    expect(field.type).to eq(expected)
+    expect(field.type).to eq(expected.to_graphql)
   end
 end
 
 RSpec::Matchers.define :have_graphql_resolver do |expected|
   match do |field|
-    expect(field.resolve_proc).to eq(expected)
+    case expected
+    when Method
+      expect(field.metadata[:type_class].resolve_proc).to eq(expected)
+    else
+      expect(field.metadata[:type_class].resolver).to eq(expected)
+    end
   end
 end
diff --git a/spec/support/shared_examples/requests/graphql_shared_examples.rb b/spec/support/shared_examples/requests/graphql_shared_examples.rb
index c143b83696e..9b2b74593a5 100644
--- a/spec/support/shared_examples/requests/graphql_shared_examples.rb
+++ b/spec/support/shared_examples/requests/graphql_shared_examples.rb
@@ -3,16 +3,9 @@ require 'spec_helper'
 shared_examples 'a working graphql query' do
   include GraphqlHelpers
 
-  let(:parsed_response) { JSON.parse(response.body) }
-  let(:response_data) { parsed_response['data'] }
-
-  before do
-    post_graphql(query)
-  end
-
   it 'is returns a successfull response', :aggregate_failures do
     expect(response).to be_success
-    expect(parsed_response['errors']).to be_nil
-    expect(response_data).not_to be_empty
+    expect(graphql_errors['errors']).to be_nil
+    expect(json_response.keys).to include('data')
   end
 end