1 files changed, 15 insertions, 0 deletions
diff --git a/spec/ruby/library/pathname/sub_spec.rb b/spec/ruby/library/pathname/sub_spec.rb
new file mode 100644
index 0000000000..ad2900f62b
--- /dev/null
+++ b/spec/ruby/library/pathname/sub_spec.rb
@@ -0,0 +1,15 @@
+require_relative '../../spec_helper'
+require 'pathname'
+
+describe "Pathname#sub" do
+
+  it "replaces the pattern with rest" do
+    Pathname.new('/usr/local/bin/').sub(/local/, 'fish').to_s.should == '/usr/fish/bin/'
+  end
+
+  it "returns a new object" do
+    p = Pathname.new('/usr/local/bin/')
+    p.sub(/local/, 'fish').should_not == p
+  end
+
+end