Expect current default for gunicorn workers

Given that legacy facts were removed from facterdb 3, the current
behavior relies on `NilClass#to_i` resolving to missing fact to 0.

The added test case for custom `workers` parameter given cannot give
false positives with the default formula always being an odd number.

Author: notCalle

spec/defines/gunicorn_spec.rb

@@ -12,8 +12,13 @@
       describe 'test-app with default parameter values' do
         context 'configures test app with default parameter values' do
           let(:params) { { dir: '/srv/testapp' } }
+          let(:expected_workers) do
+            # templates/gunicorn.erb
+            (facts[:processorcount].to_i * 2) + 1
+          end
 
           it { is_expected.to contain_file('/etc/gunicorn.d/test-app').with_mode('0644').with_content(%r{--log-level=error}) }
+          it { is_expected.to contain_file('/etc/gunicorn.d/test-app').with_mode('0644').with_content(%r{--workers=#{expected_workers}}) }
         end
 
         context 'test-app with custom log level' do
@@ -27,6 +32,12 @@
 
           it { is_expected.to contain_file('/etc/gunicorn.d/test-app').with_mode('0644').with_content(%r{--preload}) }
         end
+
+        context 'test-app with custom workers count' do
+          let(:params) { { dir: '/srv/testapp', workers: 42 } }
+
+          it { is_expected.to contain_file('/etc/gunicorn.d/test-app').with_mode('0644').with_content(%r{--workers=#{params[:workers]}}) }
+        end
       end
     end
   end