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require File.expand_path('../../../spec_helper', __FILE__)
describe :rational_ceil, shared: true do
before do
@rational = Rational(2200, 7)
end
describe "with no arguments (precision = 0)" do
it "returns an Integer" do
@rational.ceil.should be_kind_of(Integer)
end
it "returns the truncated value toward positive infinity" do
@rational.ceil.should == 315
Rational(1, 2).ceil.should == 1
Rational(-1, 2).ceil.should == 0
end
end
describe "with a precision < 0" do
it "returns an Integer" do
@rational.ceil(-2).should be_kind_of(Integer)
@rational.ceil(-1).should be_kind_of(Integer)
end
it "moves the truncation point n decimal places left" do
@rational.ceil(-3).should == 1000
@rational.ceil(-2).should == 400
@rational.ceil(-1).should == 320
end
end
describe "with precision > 0" do
it "returns a Rational" do
@rational.ceil(1).should be_kind_of(Rational)
@rational.ceil(2).should be_kind_of(Rational)
end
it "moves the truncation point n decimal places right" do
@rational.ceil(1).should == Rational(3143, 10)
@rational.ceil(2).should == Rational(31429, 100)
@rational.ceil(3).should == Rational(157143, 500)
end
end
end
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