1 files changed, 33 insertions, 0 deletions
diff --git a/spec/ruby/library/set/sortedset/add_spec.rb b/spec/ruby/library/set/sortedset/add_spec.rb
new file mode 100644
index 0000000000..bdc5c077d8
--- /dev/null
+++ b/spec/ruby/library/set/sortedset/add_spec.rb
@@ -0,0 +1,33 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+require 'set'
+require File.expand_path('../shared/add', __FILE__)
+
+describe "SortedSet#add" do
+  it_behaves_like :sorted_set_add, :add
+
+  it "takes only values which responds <=>" do
+    obj = mock('no_comparison_operator')
+    obj.should_receive(:respond_to?).with(:<=>).and_return(false)
+    lambda { SortedSet["hello"].add(obj) }.should raise_error(ArgumentError)
+  end
+end
+
+describe "SortedSet#add?" do
+  before :each do
+    @set = SortedSet.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