1 files changed, 27 insertions, 0 deletions
diff --git a/spec/ruby/library/set/add_spec.rb b/spec/ruby/library/set/add_spec.rb
new file mode 100644
index 0000000000..a7d6fb8a56
--- /dev/null
+++ b/spec/ruby/library/set/add_spec.rb
@@ -0,0 +1,27 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'set'
+require File.expand_path('../shared/add', __FILE__)
+
+describe "Set#add" do
+  it_behaves_like :set_add, :add
+end
+
+describe "Set#add?" do
+  before :each do
+    @set = Set.new
+  end
+
+  it "adds the passed Object to self" do
+    @set.add?("cat")
+    @set.should include("cat")
+  end
+
+  it "returns self when the Object has not yet been added to self" do
+    @set.add?("cat").should equal(@set)
+  end
+
+  it "returns nil when the Object has already been added to self" do
+    @set.add?("cat")
+    @set.add?("cat").should be_nil
+  end
+end