1 files changed, 23 insertions, 0 deletions
diff --git a/spec/ruby/library/set/intersect_spec.rb b/spec/ruby/library/set/intersect_spec.rb
new file mode 100644
index 0000000000..e60f06db94
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+++ b/spec/ruby/library/set/intersect_spec.rb
@@ -0,0 +1,23 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/set_like'
+require 'set'
+
+describe "Set#intersect?" do
+  it "returns true when two Sets have at least one element in common" do
+    Set[1, 2].intersect?(Set[2, 3]).should == true
+  end
+
+  it "returns false when two Sets have no element in common" do
+    Set[1, 2].intersect?(Set[3, 4]).should == false
+  end
+
+  context "when comparing to a Set-like object" do
+    it "returns true when a Set has at least one element in common with a Set-like object" do
+      Set[1, 2].intersect?(SetSpecs::SetLike.new([2, 3])).should be_true
+    end
+
+    it "returns false when a Set has no element in common with a Set-like object" do
+      Set[1, 2].intersect?(SetSpecs::SetLike.new([3, 4])).should be_false
+    end
+  end
+end