1 files changed, 73 insertions, 0 deletions
diff --git a/runtime/Ruby/test/functional/debugging/rule-tracing.rb b/runtime/Ruby/test/functional/debugging/rule-tracing.rb
new file mode 100644
index 0000000..25032d4
--- /dev/null
+++ b/runtime/Ruby/test/functional/debugging/rule-tracing.rb
@@ -0,0 +1,73 @@
+#!/usr/bin/ruby
+# encoding: utf-8
+
+require 'antlr3/test/functional'
+
+class TestRuleTracing < ANTLR3::Test::Functional
+
+  inline_grammar( <<-'END' )
+    grammar Traced;
+    options {
+      language = Ruby;
+    }
+    
+    @parser::init {
+      @stack = nil
+      @traces = []
+    }
+    
+    @parser::members {
+      attr_accessor :stack, :traces
+      
+      def trace_in(rule_name, rule_index)
+        @traces << ">#{rule_name}"
+      end
+      
+      def trace_out(rule_name, rule_index)
+        @traces << "<#{rule_name}"
+      end
+    }
+    
+    @lexer::init {
+      @stack = nil
+      @traces = []
+    }
+    
+    @lexer::members {
+      attr_accessor :stack, :traces
+      
+      def trace_in(rule_name, rule_index)
+        @traces << ">#{rule_name}"
+      end
+      
+      def trace_out(rule_name, rule_index)
+        @traces << "<#{rule_name}"
+      end
+    }
+    
+    a: '<' ((INT '+')=>b|c) '>';
+    b: c ('+' c)*;
+    c: INT ;
+    
+    INT: ('0'..'9')+;
+    WS: (' ' | '\n' | '\t')+ {$channel = HIDDEN;};
+  END
+
+  compile_options :trace => true
+  
+  example "setting up rule tracing" do
+    lexer = Traced::Lexer.new( '< 1 + 2 + 3 >' )
+    parser = Traced::Parser.new lexer
+    parser.a
+    lexer.traces.should == [ 
+            '>t__6!', '<t__6!', '>ws!', '<ws!', '>int!', '<int!', '>ws!', '<ws!',
+            '>t__8!', '<t__8!', '>ws!', '<ws!', '>int!', '<int!', '>ws!', '<ws!',
+            '>t__8!', '<t__8!', '>ws!', '<ws!', '>int!', '<int!', '>ws!', '<ws!',
+            '>t__7!', '<t__7!'
+    ]
+    parser.traces.should == [ 
+      '>a', '>synpred1_Traced', '<synpred1_Traced',
+      '>b', '>c', '<c', '>c', '<c', '>c', '<c', '<b', '<a'
+    ]
+  end
+end