1 files changed, 23 insertions, 0 deletions
diff --git a/test/rdoc/test_rdoc_ruby_lex.rb b/test/rdoc/test_rdoc_ruby_lex.rb
new file mode 100644
index 0000000000..4398f4119f
--- /dev/null
+++ b/test/rdoc/test_rdoc_ruby_lex.rb
@@ -0,0 +1,23 @@
+require 'rubygems'
+require 'minitest/autorun'
+require 'rdoc/rdoc'
+require 'rdoc/ruby_lex'
+
+class TestRubyLex < MiniTest::Unit::TestCase
+  def test_unary_minus
+    ruby_lex = RDoc::RubyLex.new("-1", nil)
+    assert_equal("-1", ruby_lex.token.value)
+
+    ruby_lex = RDoc::RubyLex.new("a[-2]", nil)
+    2.times { ruby_lex.token } # skip "a" and "["
+    assert_equal("-2", ruby_lex.token.value)
+
+    ruby_lex = RDoc::RubyLex.new("a[0..-12]", nil)
+    4.times { ruby_lex.token } # skip "a", "[", "0", and ".."
+    assert_equal("-12", ruby_lex.token.value)
+
+    ruby_lex = RDoc::RubyLex.new("0+-0.1", nil)
+    2.times { ruby_lex.token } # skip "0" and "+"
+    assert_equal("-0.1", ruby_lex.token.value)
+  end
+end