Print correct values in debug_configuration_variables task

spec/support/outputs/debug_configuration_variables.txt

@@ -0,0 +1,11 @@
+========== Configuration variables ==========
+(.|\n)*
+:bundle_bin => "bundle"
+(.|\n)*
+:releases_path => ".*/releases"
+(.|\n)*
+:keep_releases => "1234"
+(.|\n)*
+:migration_dirs => \["db/migrate"\]
+(.|\n)*
+========== Configuration variables ==========

spec/tasks/default_spec.rb

@@ -90,10 +90,20 @@
   end
 
   describe 'debug_configuration_variables' do
-    it 'prints configrtion variables' do
+    before do
       Mina::Configuration.instance.set(:debug_configuration_variables, true)
-      expect { invoke_all }.to output(/------- Printing current config variables -------/).to_stdout
+      ENV['keep_releases'] = '1234'
+    end
+
+    after do
       Mina::Configuration.instance.remove(:debug_configuration_variables)
+      ENV.delete('keep_releases')
+    end
+
+    it 'prints configuration variables' do
+      expect do
+        invoke_all
+      end.to output(output_file('debug_configuration_variables')).to_stdout
     end
   end
 end

tasks/mina/default.rb

@@ -34,11 +34,12 @@
 
 task :debug_configuration_variables do
   if fetch(:debug_configuration_variables)
-    puts
-    puts '------- Printing current config variables -------'
-    configuration.variables.each do |key, value|
-      puts "#{key.inspect} => #{(value.respond_to?(:call) ? value.call : value).inspect}"
+    puts '========== Configuration variables =========='
+    configuration.variables.each_key do |key|
+      puts "#{key.inspect} => #{fetch(key).inspect}"
     end
+    puts '========== Configuration variables =========='
+    puts
   end
 end