JRuby 1.6 support

features/support/env.rb

@@ -24,3 +24,10 @@
   end
   step 'I cd to "project"'
 end
+
+# Workaround for https://github.com/cucumber/aruba/pull/125
+Aruba.configure do |config|
+  config.before_cmd do
+    set_env('JRUBY_OPTS', '-X-C --1.9')
+  end
+end

lib/simplecov.rb

@@ -29,6 +29,7 @@ def start(adapter=nil, &block)
       return false unless SimpleCov.usable?
 
       require 'coverage'
+      require 'simplecov/jruby16_fix'
       load_adapter(adapter) unless adapter.nil?
       Coverage.start
       configure(&block) if block_given?

lib/simplecov/jruby16_fix.rb

@@ -0,0 +1,43 @@
+if defined?(JRUBY_VERSION) && JRUBY_VERSION.to_f < 1.7
+  require 'jruby'
+  java_import 'org.jruby.ast.NodeType'
+
+  # Coverage for JRuby < 1.7.0 does not work correctly
+  #
+  #  - does not distinguish lines that cannot be executed
+  #  - does (partial) coverage for files loaded before `Coverage.start`.
+  #  - does not expand a path like `lib/../spec` to `spec`.
+  #
+  # This monkey patches Coverage to address those issues
+  module Coverage
+    class << self
+      alias __broken_result__ result
+
+      def result
+        fixed = {}
+        __broken_result__.each do |path, executed_lines|
+          covered_lines = executed_lines.dup
+
+          process = lambda do |node|
+            if node.node_type == NodeType::NEWLINENODE
+              pos = node.position
+              covered_lines[pos.line] ||= 0
+            end
+            node.child_nodes.each(&process)
+          end
+
+          begin
+            process[JRuby.parse(File.read(path), path)]
+          rescue => e
+          end
+
+          if (first = covered_lines.detect { |x| x }) && first > 0
+            fixed[File.expand_path(path)] = covered_lines
+          end
+        end
+
+        fixed
+      end
+    end
+  end
+end