test/base/test_compiler_dsl.rb in nanoc-3.6.7 vs test/base/test_compiler_dsl.rb in nanoc-3.6.8

@@ -12,10 +12,29 @@
 
   def test_layout
     # TODO implement
   end
 
+  def test_preprocess_twice
+    rules_collection = Nanoc::RulesCollection.new(nil)
+    compiler_dsl = Nanoc::CompilerDSL.new(rules_collection, {})
+
+    # first time
+    io = capturing_stdio do
+      compiler_dsl.preprocess {}
+    end
+    assert_empty io[:stdout]
+    assert_empty io[:stderr]
+
+    # second time
+    io = capturing_stdio do
+      compiler_dsl.preprocess {}
+    end
+    assert_empty io[:stdout]
+    assert_match(/WARNING: A preprocess block is already defined./, io[:stderr])
+  end
+
   def test_include_rules
     # Create site
     Nanoc::CLI.run %w( create_site with_bonus_rules )
     FileUtils.cd('with_bonus_rules') do
       # Create rep
@@ -42,10 +61,10 @@
     with_site do
       # Create rules
       File.open('Rules', 'w') do |io|
         io.write <<EOS
 passthrough "/robots/"
-        
+
 compile '*' do ; end
 route '*' do ; item.identifier.chop + '-xyz' + item[:extension] ; end
 EOS
       end