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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
-> { @infinity.ceil }.should raise_error(FloatDomainError)
-> { @infinity_neg.ceil }.should raise_error(FloatDomainError)
-> { @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.
([email protected](@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|
([email protected](@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
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