1 files changed, 46 insertions, 0 deletions
diff --git a/spec/ruby/core/time/dup_spec.rb b/spec/ruby/core/time/dup_spec.rb
new file mode 100644
index 0000000000..33aa1304ef
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+++ b/spec/ruby/core/time/dup_spec.rb
@@ -0,0 +1,46 @@
+require_relative '../../spec_helper'
+
+describe "Time#dup" do
+  it "returns a Time object that represents the same time" do
+    t = Time.at(100)
+    t.dup.tv_sec.should == t.tv_sec
+  end
+
+  it "copies the gmt state flag" do
+    Time.now.gmtime.dup.should.gmt?
+  end
+
+  it "returns an independent Time object" do
+    t = Time.now
+    t2 = t.dup
+    t.gmtime
+
+    t2.should_not.gmt?
+  end
+
+  it "returns a subclass instance" do
+    c = Class.new(Time)
+    t = c.now
+
+    t.should.instance_of?(c)
+    t.dup.should.instance_of?(c)
+  end
+
+  it "returns a clone of Time instance" do
+    c = Time.dup
+    t = c.now
+
+    t.should.instance_of?(c)
+    t.should_not.instance_of?(Time)
+
+    t.dup.should.instance_of?(c)
+    t.dup.should_not.instance_of?(Time)
+  end
+
+  it "does not copy frozen status from the original" do
+    t = Time.now
+    t.freeze
+    t2 = t.dup
+    t2.frozen?.should == false
+  end
+end