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require File.expand_path('../../../spec_helper', __FILE__)
require 'bigdecimal'
describe "BigDecimal#fix" do
before(:each) do
@zero = BigDecimal("0")
@mixed = BigDecimal("1.23456789")
@pos_int = BigDecimal("2E5555")
@neg_int = BigDecimal("-2E5555")
@pos_frac = BigDecimal("2E-9999")
@neg_frac = BigDecimal("-2E-9999")
@infinity = BigDecimal("Infinity")
@infinity_neg = BigDecimal("-Infinity")
@nan = BigDecimal("NaN")
@zero_pos = BigDecimal("+0")
@zero_neg = BigDecimal("-0")
end
it "returns a BigDecimal" do
BigDecimal("2E100000000").fix.kind_of?(BigDecimal).should == true
BigDecimal("2E-999").kind_of?(BigDecimal).should == true
end
it "returns the integer part of the absolute value" do
a = BigDecimal("2E1000")
a.fix.should == a
b = BigDecimal("-2E1000")
b.fix.should == b
BigDecimal("0.123456789E5").fix.should == BigDecimal("0.12345E5")
BigDecimal("-0.123456789E5").fix.should == BigDecimal("-0.12345E5")
end
it "correctly handles special values" do
@infinity.fix.should == @infinity
@infinity_neg.fix.should == @infinity_neg
@nan.fix.nan?.should == true
end
it "returns 0 if the absolute value is < 1" do
BigDecimal("0.99999").fix.should == 0
BigDecimal("-0.99999").fix.should == 0
BigDecimal("0.000000001").fix.should == 0
BigDecimal("-0.00000001").fix.should == 0
BigDecimal("-1000000").fix.should_not == 0
@zero.fix.should == 0
@zero_pos.fix.should == @zero_pos
@zero_neg.fix.should == @zero_neg
end
it "does not allow any arguments" do
lambda {
@mixed.fix(10)
}.should raise_error(ArgumentError)
end
end
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