1 files changed, 94 insertions, 0 deletions
diff --git a/spec/ruby/core/time/comparison_spec.rb b/spec/ruby/core/time/comparison_spec.rb
new file mode 100644
index 0000000000..c5a5b83d28
--- /dev/null
+++ b/spec/ruby/core/time/comparison_spec.rb
@@ -0,0 +1,94 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Time#<=>" do
+  it "returns 1 if the first argument is a point in time after the second argument" do
+    (Time.now <=> Time.at(0)).should == 1
+  end
+
+  it "returns 1 if the first argument is a point in time after the second argument (down to a millisecond)" do
+    (Time.at(0, 1000) <=> Time.at(0, 0)).should == 1
+    (Time.at(1202778512, 1000) <=> Time.at(1202778512, 999)).should == 1
+  end
+
+  it "returns 1 if the first argument is a point in time after the second argument (down to a microsecond)" do
+    (Time.at(0, 100) <=> Time.at(0, 0)).should == 1
+    (Time.at(1202778512, 100) <=> Time.at(1202778512, 99)).should == 1
+  end
+
+  it "returns 0 if time is the same as other" do
+    (Time.at(1202778513) <=> Time.at(1202778513)).should == 0
+    (Time.at(100, 100) <=> Time.at(100, 100)).should == 0
+  end
+
+  it "returns -1 if the first argument is a point in time before the second argument" do
+    (Time.at(0) <=> Time.now).should == -1
+    (Time.at(100, 100) <=> Time.at(101, 100)).should == -1
+  end
+
+  it "returns -1 if the first argument is a point in time before the second argument (down to a millisecond)" do
+    (Time.at(0, 0) <=> Time.at(0, 1000)).should == -1
+  end
+
+  it "returns -1 if the first argument is a point in time before the second argument (down to a microsecond)" do
+    (Time.at(0, 0) <=> Time.at(0, 100)).should == -1
+  end
+
+  it "returns 1 if the first argument is a fraction of a microsecond after the second argument" do
+    (Time.at(100, Rational(1,1000)) <=> Time.at(100, 0)).should == 1
+  end
+
+  it "returns 0 if time is the same as other, including fractional microseconds" do
+    (Time.at(100, Rational(1,1000)) <=> Time.at(100, Rational(1,1000))).should == 0
+  end
+
+  it "returns -1 if the first argument is a fraction of a microsecond before the second argument" do
+    (Time.at(100, 0) <=> Time.at(100, Rational(1,1000))).should == -1
+  end
+
+  describe "given a non-Time argument" do
+    it "returns nil if argument <=> self returns nil" do
+      t = Time.now
+      obj = mock('time')
+      obj.should_receive(:<=>).with(t).and_return(nil)
+      (t <=> obj).should == nil
+    end
+
+    it "returns -1 if argument <=> self is greater than 0" do
+      t = Time.now
+      r = mock('r')
+      r.should_receive(:>).with(0).and_return(true)
+      obj = mock('time')
+      obj.should_receive(:<=>).with(t).and_return(r)
+      (t <=> obj).should == -1
+    end
+
+    it "returns 1 if argument <=> self is not greater than 0 and is less than 0" do
+      t = Time.now
+      r = mock('r')
+      r.should_receive(:>).with(0).and_return(false)
+      r.should_receive(:<).with(0).and_return(true)
+      obj = mock('time')
+      obj.should_receive(:<=>).with(t).and_return(r)
+      (t <=> obj).should == 1
+    end
+
+    it "returns 0 if argument <=> self is neither greater than 0 nor less than 0" do
+      t = Time.now
+      r = mock('r')
+      r.should_receive(:>).with(0).and_return(false)
+      r.should_receive(:<).with(0).and_return(false)
+      obj = mock('time')
+      obj.should_receive(:<=>).with(t).and_return(r)
+      (t <=> obj).should == 0
+    end
+
+    it "returns nil if argument also uses an inverse comparison for <=>" do
+      t = Time.now
+      r = mock('r')
+      def r.<=>(other); other <=> self; end
+      r.should_receive(:<=>).once
+
+      (t <=> r).should be_nil
+    end
+  end
+end