1 files changed, 47 insertions, 0 deletions
diff --git a/spec/ruby/library/datetime/hour_spec.rb b/spec/ruby/library/datetime/hour_spec.rb
new file mode 100644
index 0000000000..db89016937
--- /dev/null
+++ b/spec/ruby/library/datetime/hour_spec.rb
@@ -0,0 +1,47 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'date'
+
+describe "DateTime#hour" do
+  it "returns 0 if no argument is passed" do
+    DateTime.new.hour.should == 0
+  end
+
+  it "returns the hour given as argument" do
+    new_datetime(hour: 5).hour.should == 5
+  end
+
+  it "adds 24 to negative hours" do
+    new_datetime(hour: -10).hour.should == 14
+  end
+
+  it "raises an error for Rational" do
+    lambda { new_datetime(hour: 1 + Rational(1,2)) }.should raise_error(ArgumentError)
+  end
+
+  it "raises an error for Float" do
+    lambda { new_datetime(hour: 1.5).hour }.should raise_error(ArgumentError)
+  end
+
+  it "raises an error for Rational" do
+    lambda { new_datetime(day: 1 + Rational(1,2)) }.should raise_error(ArgumentError)
+  end
+
+  it "raises an error, when the hour is smaller than -24" do
+    lambda { new_datetime(hour: -25) }.should raise_error(ArgumentError)
+  end
+
+  it "raises an error, when the hour is larger than 24" do
+    lambda { new_datetime(hour: 25) }.should raise_error(ArgumentError)
+  end
+
+  it "raises an error for hour fractions smaller than -24" do
+    lambda { new_datetime(hour: -24 - Rational(1,2)) }.should(
+      raise_error(ArgumentError))
+  end
+
+  it "adds 1 to day, when 24 hours given" do
+    d = new_datetime day: 1, hour: 24
+    d.hour.should == 0
+    d.day.should == 2
+  end
+end