1 files changed, 31 insertions, 0 deletions
diff --git a/spec/ruby/core/set/include_spec.rb b/spec/ruby/core/set/include_spec.rb
new file mode 100644
index 0000000000..92a6ca04e6
--- /dev/null
+++ b/spec/ruby/core/set/include_spec.rb
@@ -0,0 +1,31 @@
+require_relative '../../spec_helper'
+
+describe "Set#include?" do
+  it "returns true when self contains the passed Object" do
+    set = Set[:a, :b, :c]
+    set.include?(:a).should == true
+    set.include?(:e).should == false
+  end
+
+  describe "member equality" do
+    it "is checked using both #hash and #eql?" do
+      obj = Object.new
+      obj_another = Object.new
+
+      def obj.hash; 42 end
+      def obj_another.hash; 42 end
+      def obj_another.eql?(o) hash == o.hash end
+
+      set = Set["a", "b", "c", obj]
+      set.include?(obj_another).should == true
+    end
+
+    it "is not checked using #==" do
+      obj = Object.new
+      set = Set["a", "b", "c"]
+
+      obj.should_not_receive(:==)
+      set.include?(obj)
+    end
+  end
+end