sped up some tests

spec/models/submission_spec.rb

@@ -1,29 +1,30 @@
 require 'rails_helper'
 
 describe Submission do
-  let(:submission) { Submission.create }
+  before(:all) do
+    @submission = FactoryGirl.create(:submission)
+  end
 
   it 'validates the presence of a cause' do
-    expect(submission.errors[:cause]).to be_present
+    expect(Submission.create.errors[:cause]).to be_present
   end
 
   it 'validates the presence of an exercise' do
-    expect(submission.errors[:exercise_id]).to be_present
+    expect(Submission.create.errors[:exercise_id]).to be_present
   end
 
   it 'validates the presence of a user' do
-    expect(submission.errors[:user_id]).to be_present
-    expect(submission.errors[:user_type]).to be_present
+    expect(Submission.create.errors[:user_id]).to be_present
+    expect(Submission.create.errors[:user_type]).to be_present
   end
 
   %w[download render run test].each do |action|
     describe "##{action}_url" do
-      let(:submission) { FactoryGirl.create(:submission) }
-      let(:url) { submission.send(:"#{action}_url") }
+      let(:url) { @submission.send(:"#{action}_url") }
 
       it "starts like the #{action} path" do
         filename = File.basename(__FILE__)
-        expect(url).to start_with(Rails.application.routes.url_helpers.send(:"#{action}_submission_path", submission, filename).sub(filename, ''))
+        expect(url).to start_with(Rails.application.routes.url_helpers.send(:"#{action}_submission_path", @submission, filename).sub(filename, ''))
       end
 
       it 'ends with a placeholder' do