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9dc121cc57
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63768 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
86 lines
3.2 KiB
Ruby
86 lines
3.2 KiB
Ruby
require_relative '../../spec_helper'
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require 'bigdecimal'
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describe "BigDecimal#split" do
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before :each do
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@arr = BigDecimal("0.314159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043E1").split
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@arr_neg = BigDecimal("-0.314159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043E1").split
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@digits = "922337203685477580810101333333333333333333333333333"
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@arr_big = BigDecimal("00#{@digits}000").split
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@arr_big_neg = BigDecimal("-00#{@digits}000").split
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@huge = BigDecimal('100000000000000000000000000000000000000000001E90000000').split
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@infinity = BigDecimal("Infinity")
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@infinity_neg = BigDecimal("-Infinity")
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@nan = BigDecimal("NaN")
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@zero = BigDecimal("0")
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@zero_neg = BigDecimal("-0")
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end
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it "splits BigDecimal in an array with four values" do
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@arr.size.should == 4
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end
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it "first value: 1 for numbers > 0" do
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@arr[0].should == 1
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@arr_big[0].should == 1
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@zero.split[0].should == 1
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@huge[0].should == 1
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BigDecimal("+0").split[0].should == 1
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BigDecimal("1E400").split[0].should == 1
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@infinity.split[0].should == 1
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end
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it "first value: -1 for numbers < 0" do
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@arr_neg[0].should == -1
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@arr_big_neg[0].should == -1
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@zero_neg.split[0].should == -1
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BigDecimal("-1E400").split[0].should == -1
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@infinity_neg.split[0].should == -1
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end
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it "first value: 0 if BigDecimal is NaN" do
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BigDecimal("NaN").split[0].should == 0
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end
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it "second value: a string with the significant digits" do
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string = "314159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043"
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@arr[1].should == string
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@arr_big[1].should == @digits
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@arr_big_neg[1].should == @digits
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@huge[1].should == "100000000000000000000000000000000000000000001"
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@infinity.split[1].should == @infinity.to_s
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@nan.split[1].should == @nan.to_s
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@infinity_neg.split[1].should == @infinity.to_s
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@zero.split[1].should == "0"
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BigDecimal("-0").split[1].should == "0"
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end
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it "third value: the base (currently always ten)" do
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@arr[2].should == 10
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@arr_neg[2].should == 10
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@arr_big[2].should == 10
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@arr_big_neg[2].should == 10
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@huge[2].should == 10
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@infinity.split[2].should == 10
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@nan.split[2].should == 10
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@infinity_neg.split[2].should == 10
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@zero.split[2].should == 10
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@zero_neg.split[2].should == 10
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end
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it "fourth value: the exponent" do
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@arr[3].should == 1
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@arr_neg[3].should == 1
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@arr_big[3].should == 54
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@arr_big_neg[3].should == 54
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@huge[3].should == 90000045
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@infinity.split[3].should == 0
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@nan.split[3].should == 0
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@infinity_neg.split[3].should == 0
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@zero.split[3].should == 0
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@zero_neg.split[3].should == 0
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end
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end
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