1 files changed, 27 insertions, 0 deletions
diff --git a/spec/ruby/core/time/nsec_spec.rb b/spec/ruby/core/time/nsec_spec.rb
new file mode 100644
index 0000000000..3a6be1d016
--- /dev/null
+++ b/spec/ruby/core/time/nsec_spec.rb
@@ -0,0 +1,27 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Time#nsec" do
+  it "returns 0 for a Time constructed with a whole number of seconds" do
+    Time.at(100).nsec.should == 0
+  end
+
+  it "returns the nanoseconds part of a Time constructed with a Float number of seconds" do
+    Time.at(10.75).nsec.should == 750_000_000
+  end
+
+  it "returns the nanoseconds part of a Time constructed with an Integer number of microseconds" do
+    Time.at(0, 999_999).nsec.should == 999_999_000
+  end
+
+  it "returns the nanoseconds part of a Time constructed with an Float number of microseconds" do
+    Time.at(0, 3.75).nsec.should == 3750
+  end
+
+  it "returns the nanoseconds part of a Time constructed with a Rational number of seconds" do
+    Time.at(Rational(3, 2)).nsec.should == 500_000_000
+  end
+
+  it "returns the nanoseconds part of a Time constructed with an Rational number of microseconds" do
+    Time.at(0, Rational(99, 10)).nsec.should == 9900
+  end
+end