1 files changed, 23 insertions, 0 deletions
diff --git a/spec/ruby/language/regexp/grouping_spec.rb b/spec/ruby/language/regexp/grouping_spec.rb
new file mode 100644
index 0000000000..443cab7ee0
--- /dev/null
+++ b/spec/ruby/language/regexp/grouping_spec.rb
@@ -0,0 +1,23 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../../fixtures/classes', __FILE__)
+
+describe "Regexps with grouping" do
+  it "support ()" do
+    /(a)/.match("a").to_a.should == ["a", "a"]
+  end
+
+  it "allows groups to be nested" do
+    md = /(hay(st)a)ck/.match('haystack')
+    md.to_a.should == ['haystack','haysta', 'st']
+  end
+
+  it "raises a SyntaxError when parentheses aren't balanced" do
+   lambda { eval "/(hay(st)ack/" }.should raise_error(SyntaxError)
+  end
+
+  it "supports (?: ) (non-capturing group)" do
+    /(?:foo)(bar)/.match("foobar").to_a.should == ["foobar", "bar"]
+    # Parsing precedence
+    /(?:xdigit:)/.match("xdigit:").to_a.should == ["xdigit:"]
+  end
+end