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96 lines
2.9 KiB
Ruby
96 lines
2.9 KiB
Ruby
require_relative '../../spec_helper'
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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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@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, 10.5, 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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@float_infinity = Float::INFINITY
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@float_infinity_neg = -Float::INFINITY
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@nan = BigDecimal("NaN")
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end
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it "returns true if a > b" do
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one = BigDecimal("1")
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two = BigDecimal("2")
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frac_1 = BigDecimal("1E-99999")
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frac_2 = BigDecimal("0.9E-99999")
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(@zero > one).should == false
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(two > @zero).should == true
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(frac_2 > frac_1).should == false
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(@neg_int > @pos_int).should == false
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(@pos_int > @neg_int).should == true
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(@neg_int > @pos_frac).should == false
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(@pos_frac > @neg_int).should == true
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(@zero > @zero_pos).should == false
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(@zero > @zero_neg).should == false
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(@zero_neg > @zero_pos).should == false
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(@zero_pos > @zero_neg).should == false
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end
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it "properly handles infinity values" do
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@values.each { |val|
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(val > @infinity).should == false
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(@infinity > val).should == true
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(val > @infinity_neg).should == true
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(@infinity_neg > val).should == false
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}
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(@infinity > @infinity).should == false
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(@infinity_neg > @infinity_neg).should == false
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(@infinity > @infinity_neg).should == true
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(@infinity_neg > @infinity).should == false
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end
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it "properly handles Float infinity values" do
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@values.each { |val|
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(val > @float_infinity).should == false
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(@float_infinity > val).should == true
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(val > @float_infinity_neg).should == true
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(@float_infinity_neg > val).should == false
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}
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end
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it "properly handles NaN values" do
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@values += [@infinity, @infinity_neg, @nan]
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@values.each { |val|
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(@nan > val).should == false
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(val > @nan).should == false
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}
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end
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it "raises an ArgumentError if the argument can't be coerced into a BigDecimal" do
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-> {@zero > nil }.should raise_error(ArgumentError)
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-> {@infinity > nil }.should raise_error(ArgumentError)
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-> {@infinity_neg > nil }.should raise_error(ArgumentError)
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-> {@mixed > nil }.should raise_error(ArgumentError)
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-> {@pos_int > nil }.should raise_error(ArgumentError)
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-> {@neg_frac > nil }.should raise_error(ArgumentError)
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end
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end
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