1 files changed, 35 insertions, 0 deletions
diff --git a/spec/ruby/core/regexp/named_captures_spec.rb b/spec/ruby/core/regexp/named_captures_spec.rb
new file mode 100644
index 0000000000..c495d00a35
--- /dev/null
+++ b/spec/ruby/core/regexp/named_captures_spec.rb
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+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Regexp#named_captures" do
+  it "returns a Hash" do
+    /foo/.named_captures.should be_an_instance_of(Hash)
+  end
+
+  it "returns an empty Hash when there are no capture groups" do
+    /foo/.named_captures.should == {}
+  end
+
+  it "sets the keys of the Hash to the names of the capture groups" do
+    rex = /this (?<is>is) [aA] (?<pat>pate?rn)/
+    rex.named_captures.keys.should == ['is','pat']
+  end
+
+  it "sets the values of the Hash to Arrays" do
+    rex = /this (?<is>is) [aA] (?<pat>pate?rn)/
+    rex.named_captures.values.each do |value|
+      value.should be_an_instance_of(Array)
+    end
+  end
+
+  it "sets each element of the Array to the corresponding group's index" do
+    rex = /this (?<is>is) [aA] (?<pat>pate?rn)/
+    rex.named_captures['is'].should == [1]
+    rex.named_captures['pat'].should == [2]
+  end
+
+  it "works with duplicate capture group names" do
+    rex = /this (?<is>is) [aA] (?<pat>pate?(?<is>rn))/
+    rex.named_captures['is'].should == [1,3]
+    rex.named_captures['pat'].should == [2]
+  end
+end