put in institution acceptance test

spec/acceptance/institutions_spec.rb

@@ -55,4 +55,27 @@ resource 'Institutions' do
     end
   end
 
+  put '/v1/institutions/:id' do
+    include_context "authenticate_user"
+
+    parameter :name, 'The name of the institution'
+    parameter :description, 'The description of the institution'
+    parameter :address, 'The address of the institution'
+    parameter :city, 'The city of the institution'
+    parameter :country, 'The country of the institution'
+
+    let(:name) { Faker::Name.name }
+    let(:description) { Faker::Lorem.paragraph }
+    let(:address) { Faker::Address.street_address }
+    let(:city) { Faker::Address.city }
+    let(:country) { Faker::Address.country }
+    let(:id) { institutions.first.id }
+    let(:raw_post) { params.to_json }
+
+    example 'Updating an institution' do
+      do_request
+      expect(status).to eq(200)
+    end
+  end
+
 end