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* For easier modifications of ruby/spec by MRI developers. * .gitignore: track changes under spec. * spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec. These files can therefore be updated like any other file in MRI. Instructions are provided in spec/README. [Feature #13156] [ruby-core:79246] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
81 lines
2.2 KiB
Ruby
81 lines
2.2 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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require 'bigdecimal'
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describe "BigDecimal#<=>" do
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before :each do
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@zero = BigDecimal("0")
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@zero_pos = BigDecimal("+0")
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@zero_neg = BigDecimal("-0")
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@mixed = BigDecimal("1.23456789")
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@mixed_big = BigDecimal("1.23456789E100")
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@pos_int = BigDecimal("2E5555")
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@neg_int = BigDecimal("-2E5555")
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@pos_frac = BigDecimal("2E-9999")
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@neg_frac = BigDecimal("-2E-9999")
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@int_mock = mock('123')
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class << @int_mock
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def coerce(other)
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return [other, BigDecimal('123')]
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end
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def >= (other)
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BigDecimal('123') >= other
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end
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end
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@values = [@mixed, @pos_int, @neg_int, @pos_frac, @neg_frac,
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-2**32, -2**31, -2**30, -2**16, -2**8, -100, -10, -1,
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@zero , 1, 2, 10, 2**8, 2**16, 2**32, @int_mock, @zero_pos, @zero_neg]
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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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end
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it "returns 0 if a == b" do
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(@pos_int <=> @pos_int).should == 0
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(@neg_int <=> @neg_int).should == 0
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(@pos_frac <=> @pos_frac).should == 0
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(@neg_frac <=> @neg_frac).should == 0
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(@zero <=> @zero).should == 0
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(@infinity <=> @infinity).should == 0
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(@infinity_neg <=> @infinity_neg).should == 0
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end
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it "returns 1 if a > b" do
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(@pos_int <=> @neg_int).should == 1
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(@pos_frac <=> @neg_frac).should == 1
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(@pos_frac <=> @zero).should == 1
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@values.each { |val|
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(@infinity <=> val).should == 1
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}
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end
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it "returns -1 if a < b" do
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(@zero <=> @pos_frac).should == -1
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(@neg_int <=> @pos_frac).should == -1
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(@pos_frac <=> @pos_int).should == -1
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@values.each { |val|
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(@infinity_neg <=> val).should == -1
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}
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end
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it "returns nil if NaN is involved" do
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@values += [@infinity, @infinity_neg, @nan]
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@values << nil
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@values << Object.new
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@values.each { |val|
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(@nan <=> val).should == nil
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}
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end
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it "returns nil if the argument is nil" do
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(@zero <=> nil).should == nil
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(@infinity <=> nil).should == nil
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(@infinity_neg <=> nil).should == nil
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(@mixed <=> nil).should == nil
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(@pos_int <=> nil).should == nil
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(@neg_frac <=> nil).should == nil
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end
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end
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