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..b32ce96d44
--- /dev/null
+++ b/spec/ruby/core/time/dup_spec.rb
@@ -0,0 +1,46 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+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.gmt?.should == true
+  end
+
+  it "returns an independent Time object" do
+    t = Time.now
+    t2 = t.dup
+    t.gmtime
+
+    t2.gmt?.should == false
+  end
+
+  it "returns a subclass instance" do
+    c = Class.new(Time)
+    t = c.now
+
+    t.should be_an_instance_of(c)
+    t.dup.should be_an_instance_of(c)
+  end
+
+  it "returns a clone of Time instance" do
+    c = Time.dup
+    t = c.now
+
+    t.should be_an_instance_of(c)
+    t.should_not be_an_instance_of(Time)
+
+    t.dup.should be_an_instance_of(c)
+    t.dup.should_not be_an_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 be_false
+  end
+end