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Contents
require File.expand_path(File.dirname(__FILE__)) + '/spec_helper.rb'
MPFR.set_default_prec(300)
describe MPFR, 'when setting abnormal number' do
it "should be set nan" do
a = MPFR.new(rand)
a.set_nan
a.nan?.should be_true
a.to_s.should == "nan"
end
it "should be set infinity" do
a = MPFR.new(rand)
a.set_inf(0)
a.infinite?.should be_true
a.to_s.should == "inf"
a.set_inf(1)
a.infinite?.should be_true
a.to_s.should == "inf"
a.set_inf(-1)
a.infinite?.should be_true
a.to_s.should == "-inf"
end
end
describe MPFR, 'when setting value' do
it "should swap each other" do
num = 100
args = [GenerateNumber.mpfr_args(num), GenerateNumber.mpfr_args(num)]
args[0].each_index{ |i| check_swap(args[0][i], args[1][i]) }
end
it "should set other value" do
[0, 3, 2.2, -0.2, '1.0e-3', '-2e14', '2225'].each{ |val| check_set(val) }
end
it "should set value by set_fixnum_2exp" do
for i in 0..100
check_fixnum_2exp(rand(100), rand(100))
end
end
end
def check_swap(a, b)
tmp_a = a.dup
tmp_b = b.dup
tmp_a.swap(tmp_b)
a.should == tmp_b
b.should == tmp_a
end
def check_set(val)
tmp = MPFR.new
tmp.set(val)
tmp2 = tmp.dup
a = (tmp2 + 3) / Math::PI
tmp.nan?.should_not be_true
tmp.should_not == a
end
def check_fixnum_2exp(num, exp)
ret = MPFR.new(num)
if exp < 0
for i in 0...(exp.abs)
ret /= MPFR.new(2)
end
else
for i in 0...exp
ret *= MPFR.new(2)
end
end
MPFR.new.set_fixnum_2exp(num, exp).should == ret
end
Version data entries
7 entries across 7 versions & 1 rubygems