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require File.expand_path('../../../spec_helper', __FILE__)
require 'bigdecimal'
describe "BigDecimal#split" do
before :each do
@arr = BigDecimal("0.314159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043E1").split
@arr_neg = BigDecimal("-0.314159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043E1").split
@digits = "922337203685477580810101333333333333333333333333333"
@arr_big = BigDecimal("00#{@digits}000").split
@arr_big_neg = BigDecimal("-00#{@digits}000").split
@huge = BigDecimal('100000000000000000000000000000000000000000001E90000000').split
@infinity = BigDecimal("Infinity")
@infinity_neg = BigDecimal("-Infinity")
@nan = BigDecimal("NaN")
@zero = BigDecimal("0")
@zero_neg = BigDecimal("-0")
end
it "splits BigDecimal in an array with four values" do
@arr.size.should == 4
end
it "first value: 1 for numbers > 0" do
@arr[0].should == 1
@arr_big[0].should == 1
@zero.split[0].should == 1
@huge[0].should == 1
BigDecimal("+0").split[0].should == 1
BigDecimal("1E400").split[0].should == 1
@infinity.split[0].should == 1
end
it "first value: -1 for numbers < 0" do
@arr_neg[0].should == -1
@arr_big_neg[0].should == -1
@zero_neg.split[0].should == -1
BigDecimal("-1E400").split[0].should == -1
@infinity_neg.split[0].should == -1
end
it "first value: 0 if BigDecimal is NaN" do
BigDecimal("NaN").split[0].should == 0
end
it "second value: a string with the significant digits" do
string = "314159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043"
@arr[1].should == string
@arr_big[1].should == @digits
@arr_big_neg[1].should == @digits
@huge[1].should == "100000000000000000000000000000000000000000001"
@infinity.split[1].should == @infinity.to_s
@nan.split[1].should == @nan.to_s
@infinity_neg.split[1].should == @infinity.to_s
@zero.split[1].should == "0"
BigDecimal("-0").split[1].should == "0"
end
it "third value: the base (currently always ten)" do
@arr[2].should == 10
@arr_neg[2].should == 10
@arr_big[2].should == 10
@arr_big_neg[2].should == 10
@huge[2].should == 10
@infinity.split[2].should == 10
@nan.split[2].should == 10
@infinity_neg.split[2].should == 10
@zero.split[2].should == 10
@zero_neg.split[2].should == 10
end
it "fourth value: the exponent" do
@arr[3].should == 1
@arr_neg[3].should == 1
@arr_big[3].should == 54
@arr_big_neg[3].should == 54
@huge[3].should == 90000045
@infinity.split[3].should == 0
@nan.split[3].should == 0
@infinity_neg.split[3].should == 0
@zero.split[3].should == 0
@zero_neg.split[3].should == 0
end
end
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