Refined warnings against literal in flip-flop

1 files changed, 21 insertions, 3 deletions

diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 05e6de38f5..9b9063c768 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -1007,9 +1007,6 @@ eom
     assert_warn(/literal in condition/) do
       eval('1 if //')
     end
-    assert_warn(/literal in condition/) do
-      eval('1 if true..false')
-    end
     assert_warning(/literal in condition/) do
       eval('1 if 1')
     end
@@ -1040,6 +1037,27 @@ eom
     end
   end
 
+  def test_warning_literal_in_flip_flop
+    assert_warn(/literal in flip-flop/) do
+      eval('1 if ""..false')
+    end
+    assert_warning(/literal in flip-flop/) do
+      eval('1 if :foo..false')
+    end
+    assert_warning(/literal in flip-flop/) do
+      eval('1 if :"#{"foo".upcase}"..false')
+    end
+    assert_warn(/literal in flip-flop/) do
+      eval('1 if ""...false')
+    end
+    assert_warning(/literal in flip-flop/) do
+      eval('1 if :foo...false')
+    end
+    assert_warning(/literal in flip-flop/) do
+      eval('1 if :"#{"foo".upcase}"...false')
+    end
+  end
+
   def test_alias_symbol
     bug8851 = '[ruby-dev:47681] [Bug #8851]'
     formats = ['%s', ":'%s'", ':"%s"', '%%s(%s)']