Cleanup. Added a new test

2 files changed, 48 insertions, 0 deletions

diff --git a/test/testyacc.py b/test/testyacc.py
index 7bc7751..2127d8b 100644
--- a/test/testyacc.py
+++ b/test/testyacc.py
@@ -238,6 +238,24 @@ class YaccErrorWarningTests(unittest.TestCase):
                                     "rejected rule (expression -> NUMBER) in state 15\n"
 
                                     ))
+
+    def test_yacc_rr_unused(self):
+        run_import("yacc_rr_unused")
+        result = sys.stderr.getvalue()
+        open("foo","w").write(result)
+        self.assert_(check_expected(result,
+                                    "no p_error() function is defined\n"
+                                    "Generating LALR tables\n"
+                                    "3 reduce/reduce conflicts\n"
+                                    "reduce/reduce conflict in state 1 resolved using rule (rule3 -> A)\n"
+                                    "rejected rule (rule4 -> A) in state 1\n"
+                                    "reduce/reduce conflict in state 1 resolved using rule (rule3 -> A)\n"
+                                    "rejected rule (rule5 -> A) in state 1\n"
+                                    "reduce/reduce conflict in state 1 resolved using rule (rule4 -> A)\n"
+                                    "rejected rule (rule5 -> A) in state 1\n"
+                                    "Rule (rule5 -> A) is never reduced\n"
+                                    ))
+
     def test_yacc_simple(self):
         run_import("yacc_simple")
         result = sys.stderr.getvalue()
diff --git a/test/yacc_rr_unused.py b/test/yacc_rr_unused.py
new file mode 100644
index 0000000..1ca5f7e
--- /dev/null
+++ b/test/yacc_rr_unused.py
@@ -0,0 +1,30 @@
+# -----------------------------------------------------------------------------
+# yacc_rr_unused.py
+#
+# A grammar with reduce/reduce conflicts and a rule that never
+# gets reduced.
+# -----------------------------------------------------------------------------
+import sys
+
+if ".." not in sys.path: sys.path.insert(0,"..")
+import ply.yacc as yacc
+
+tokens = ('A', 'B', 'C')
+
+def p_grammar(p):
+   '''
+   rule1 : rule2 B
+         | rule2 C
+
+   rule2 : rule3 B
+         | rule4
+         | rule5
+
+   rule3 : A
+
+   rule4 : A
+
+   rule5 : A
+   '''
+
+yacc.yacc()