1 files changed, 24 insertions, 0 deletions
diff --git a/spec/ruby/library/set/initialize_spec.rb b/spec/ruby/library/set/initialize_spec.rb
index 11a1095fd7..887cae45fc 100644
--- a/spec/ruby/library/set/initialize_spec.rb
+++ b/spec/ruby/library/set/initialize_spec.rb
@@ -14,6 +14,14 @@ describe "Set#initialize" do
     s.should include(3)
   end
 
+  it "should initialize with empty array and set" do
+    s = Set.new([])
+    s.size.should eql(0)
+
+    s = Set.new({})
+    s.size.should eql(0)
+  end
+
   it "preprocesses all elements by a passed block before adding to self" do
     s = Set.new([1, 2, 3]) { |x| x * x }
     s.size.should eql(3)
@@ -21,4 +29,20 @@ describe "Set#initialize" do
     s.should include(4)
     s.should include(9)
   end
+
+  it "should initialize with empty array and block" do
+    s = Set.new([]) { |x| x * x }
+    s.size.should eql(0)
+  end
+
+  it "should initialize with empty set and block" do
+    s = Set.new(Set.new) { |x| x * x }
+    s.size.should eql(0)
+  end
+
+  it "should initialize with just block" do
+    s = Set.new { |x| x * x }
+    s.size.should eql(0)
+    s.should eql(Set.new)
+  end
 end