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1d15d5f080
* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
109 lines
3.9 KiB
Ruby
109 lines
3.9 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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require 'bigdecimal'
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describe "BigDecimal.new" do
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it "creates a new object of class BigDecimal" do
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BigDecimal.new("3.14159").should be_kind_of(BigDecimal)
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(0..9).each {|i|
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BigDecimal.new("1#{i}").should == 10 + i
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BigDecimal.new("-1#{i}").should == -10 - i
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BigDecimal.new("1E#{i}").should == 10**i
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BigDecimal.new("1000000E-#{i}").should == 10**(6-i).to_f
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# ^ to_f to avoid Rational type
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}
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(1..9).each {|i|
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BigDecimal.new("100.#{i}").to_s.should =~ /\A0\.100#{i}E3\z/i
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BigDecimal.new("-100.#{i}").to_s.should =~ /\A-0\.100#{i}E3\z/i
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}
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end
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it "accepts significant digits >= given precision" do
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BigDecimal.new("3.1415923", 10).precs[1].should >= 10
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end
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it "determines precision from initial value" do
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pi_string = "3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043"
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BigDecimal.new(pi_string).precs[1].should >= pi_string.size-1
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end
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it "ignores leading whitespace" do
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BigDecimal.new(" \t\n \r1234").should == BigDecimal.new("1234")
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BigDecimal.new(" \t\n \rNaN \n").nan?.should == true
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BigDecimal.new(" \t\n \rInfinity \n").infinite?.should == 1
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BigDecimal.new(" \t\n \r-Infinity \n").infinite?.should == -1
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end
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it "ignores trailing garbage" do
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BigDecimal.new("123E45ruby").should == BigDecimal.new("123E45")
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BigDecimal.new("123x45").should == BigDecimal.new("123")
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BigDecimal.new("123.4%E5").should == BigDecimal.new("123.4")
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BigDecimal.new("1E2E3E4E5E").should == BigDecimal.new("100")
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end
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ruby_version_is ""..."2.4" do
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it "treats invalid strings as 0.0" do
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BigDecimal.new("ruby").should == BigDecimal.new("0.0")
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BigDecimal.new(" \t\n \r-\t\t\tInfinity \n").should == BigDecimal.new("0.0")
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end
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end
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ruby_version_is "2.4" do
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it "raises ArgumentError for invalid strings" do
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lambda { BigDecimal.new("ruby") }.should raise_error(ArgumentError)
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lambda { BigDecimal.new(" \t\n \r-\t\t\tInfinity \n") }.should raise_error(ArgumentError)
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end
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end
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it "allows omitting the integer part" do
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BigDecimal.new(".123").should == BigDecimal.new("0.123")
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end
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it "allows for underscores in all parts" do
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reference = BigDecimal.new("12345.67E89")
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BigDecimal.new("12_345.67E89").should == reference
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BigDecimal.new("1_2_3_4_5_._6____7_E89").should == reference
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BigDecimal.new("12345_.67E_8__9_").should == reference
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end
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it "accepts NaN and [+-]Infinity" do
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BigDecimal.new("NaN").nan?.should == true
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pos_inf = BigDecimal.new("Infinity")
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pos_inf.finite?.should == false
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pos_inf.should > 0
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pos_inf.should == BigDecimal.new("+Infinity")
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neg_inf = BigDecimal.new("-Infinity")
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neg_inf.finite?.should == false
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neg_inf.should < 0
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end
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it "allows for [eEdD] as exponent separator" do
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reference = BigDecimal.new("12345.67E89")
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BigDecimal.new("12345.67e89").should == reference
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BigDecimal.new("12345.67E89").should == reference
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BigDecimal.new("12345.67d89").should == reference
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BigDecimal.new("12345.67D89").should == reference
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end
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it "allows for varying signs" do
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reference = BigDecimal.new("123.456E1")
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BigDecimal.new("+123.456E1").should == reference
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BigDecimal.new("-123.456E1").should == -reference
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BigDecimal.new("123.456E+1").should == reference
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BigDecimal.new("12345.6E-1").should == reference
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BigDecimal.new("+123.456E+1").should == reference
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BigDecimal.new("+12345.6E-1").should == reference
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BigDecimal.new("-123.456E+1").should == -reference
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BigDecimal.new("-12345.6E-1").should == -reference
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end
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it 'raises ArgumentError when Float is used without precision' do
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lambda { BigDecimal(1.0) }.should raise_error(ArgumentError)
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end
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end
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