mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
401b64c4e8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62656 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
104 lines
3.6 KiB
Ruby
104 lines
3.6 KiB
Ruby
require_relative '../../spec_helper'
|
|
require 'bigdecimal'
|
|
|
|
describe "BigDecimal#ceil" do
|
|
before :each do
|
|
@zero = BigDecimal("0")
|
|
@one = BigDecimal("1")
|
|
@three = BigDecimal("3")
|
|
@four = BigDecimal("4")
|
|
@mixed = BigDecimal("1.23456789")
|
|
@mixed_big = BigDecimal("1.23456789E100")
|
|
@pos_int = BigDecimal("2E5555")
|
|
@neg_int = BigDecimal("-2E5555")
|
|
@pos_frac = BigDecimal("2E-9999")
|
|
@neg_frac = BigDecimal("-2E-9999")
|
|
|
|
@infinity = BigDecimal("Infinity")
|
|
@infinity_neg = BigDecimal("-Infinity")
|
|
@nan = BigDecimal("NaN")
|
|
@zero_pos = BigDecimal("+0")
|
|
@zero_neg = BigDecimal("-0")
|
|
end
|
|
|
|
it "returns an Integer, if n is unspecified" do
|
|
@mixed.ceil.kind_of?(Integer).should == true
|
|
end
|
|
|
|
it "returns a BigDecimal, if n is specified" do
|
|
@pos_int.ceil(2).kind_of?(BigDecimal).should == true
|
|
end
|
|
|
|
it "returns the smallest integer greater or equal to self, if n is unspecified" do
|
|
@pos_int.ceil.should == @pos_int
|
|
@neg_int.ceil.should == @neg_int
|
|
@pos_frac.ceil.should == BigDecimal("1")
|
|
@neg_frac.ceil.should == @zero
|
|
@zero.ceil.should == 0
|
|
@zero_pos.ceil.should == @zero_pos
|
|
@zero_neg.ceil.should == @zero_neg
|
|
|
|
|
|
BigDecimal('2.3').ceil.should == 3
|
|
BigDecimal('2.5').ceil.should == 3
|
|
BigDecimal('2.9999').ceil.should == 3
|
|
BigDecimal('-2.3').ceil.should == -2
|
|
BigDecimal('-2.5').ceil.should == -2
|
|
BigDecimal('-2.9999').ceil.should == -2
|
|
end
|
|
|
|
it "raise exception, if self is special value" do
|
|
lambda { @infinity.ceil }.should raise_error(FloatDomainError)
|
|
lambda { @infinity_neg.ceil }.should raise_error(FloatDomainError)
|
|
lambda { @nan.ceil }.should raise_error(FloatDomainError)
|
|
end
|
|
|
|
it "returns n digits right of the decimal point if given n > 0" do
|
|
@mixed.ceil(1).should == BigDecimal("1.3")
|
|
@mixed.ceil(5).should == BigDecimal("1.23457")
|
|
|
|
BigDecimal("-0.03").ceil(1).should == BigDecimal("0")
|
|
BigDecimal("0.03").ceil(1).should == BigDecimal("0.1")
|
|
|
|
BigDecimal("23.45").ceil(0).should == BigDecimal('24')
|
|
BigDecimal("23.45").ceil(1).should == BigDecimal('23.5')
|
|
BigDecimal("23.45").ceil(2).should == BigDecimal('23.45')
|
|
|
|
BigDecimal("-23.45").ceil(0).should == BigDecimal('-23')
|
|
BigDecimal("-23.45").ceil(1).should == BigDecimal('-23.4')
|
|
BigDecimal("-23.45").ceil(2).should == BigDecimal('-23.45')
|
|
|
|
BigDecimal("2E-10").ceil(0).should == @one
|
|
BigDecimal("2E-10").ceil(9).should == BigDecimal('1E-9')
|
|
BigDecimal("2E-10").ceil(10).should == BigDecimal('2E-10')
|
|
BigDecimal("2E-10").ceil(11).should == BigDecimal('2E-10')
|
|
|
|
(1..10).each do |n|
|
|
# 0.4, 0.34, 0.334, etc.
|
|
(@one.div(@three,20)).ceil(n).should == BigDecimal("0.#{'3'*(n-1)}4")
|
|
# 1.4, 1.34, 1.334, etc.
|
|
(@four.div(@three,20)).ceil(n).should == BigDecimal("1.#{'3'*(n-1)}4")
|
|
(BigDecimal('31').div(@three,20)).ceil(n).should == BigDecimal("10.#{'3'*(n-1)}4")
|
|
end
|
|
(1..10).each do |n|
|
|
# -0.4, -0.34, -0.334, etc.
|
|
(-@one.div(@three,20)).ceil(n).should == BigDecimal("-0.#{'3'* n}")
|
|
end
|
|
(1..10).each do |n|
|
|
(@three.div(@one,20)).ceil(n).should == @three
|
|
end
|
|
(1..10).each do |n|
|
|
(-@three.div(@one,20)).ceil(n).should == -@three
|
|
end
|
|
end
|
|
|
|
it "sets n digits left of the decimal point to 0, if given n < 0" do
|
|
BigDecimal("13345.234").ceil(-2).should == BigDecimal("13400.0")
|
|
@mixed_big.ceil(-99).should == BigDecimal("0.13E101")
|
|
@mixed_big.ceil(-100).should == BigDecimal("0.2E101")
|
|
@mixed_big.ceil(-95).should == BigDecimal("0.123457E101")
|
|
BigDecimal("1E10").ceil(-30).should == BigDecimal('1E30')
|
|
BigDecimal("-1E10").ceil(-30).should == @zero
|
|
end
|
|
|
|
end
|