1 files changed, 45 insertions, 2 deletions
diff --git a/spec/ruby/core/rational/ceil_spec.rb b/spec/ruby/core/rational/ceil_spec.rb
index e7aca07d33..0464eab101 100644
--- a/spec/ruby/core/rational/ceil_spec.rb
+++ b/spec/ruby/core/rational/ceil_spec.rb
@@ -1,5 +1,48 @@
-require File.expand_path('../../../shared/rational/ceil', __FILE__)
+require_relative "../../spec_helper"
+require_relative "../integer/shared/integer_ceil_precision"
 
 describe "Rational#ceil" do
-  it_behaves_like(:rational_ceil, :ceil)
+  context "with values equal to integers" do
+    it_behaves_like :integer_ceil_precision, :Rational
+  end
+
+  before do
+    @rational = Rational(2200, 7)
+  end
+
+  describe "with no arguments (precision = 0)" do
+    it "returns the Integer value rounded toward positive infinity" do
+      @rational.ceil.should.eql? 315
+
+      Rational(1, 2).ceil.should.eql? 1
+      Rational(-1, 2).ceil.should.eql? 0
+      Rational(1, 1).ceil.should.eql? 1
+    end
+  end
+
+  describe "with a precision < 0" do
+    it "moves the rounding point n decimal places left, returning an Integer" do
+      @rational.ceil(-3).should.eql? 1000
+      @rational.ceil(-2).should.eql? 400
+      @rational.ceil(-1).should.eql? 320
+
+      Rational(100, 2).ceil(-1).should.eql? 50
+      Rational(100, 2).ceil(-2).should.eql? 100
+      Rational(-100, 2).ceil(-1).should.eql?(-50)
+      Rational(-100, 2).ceil(-2).should.eql?(0)
+    end
+  end
+
+  describe "with precision > 0" do
+    it "moves the rounding point n decimal places right, returning a Rational" do
+      @rational.ceil(1).should.eql? Rational(3143, 10)
+      @rational.ceil(2).should.eql? Rational(31429, 100)
+      @rational.ceil(3).should.eql? Rational(157143, 500)
+
+      Rational(100, 2).ceil(1).should.eql? Rational(50, 1)
+      Rational(100, 2).ceil(2).should.eql? Rational(50, 1)
+      Rational(-100, 2).ceil(1).should.eql? Rational(-50, 1)
+      Rational(-100, 2).ceil(2).should.eql? Rational(-50, 1)
+    end
+  end
 end