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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66622 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
19 lines
630 B
Ruby
19 lines
630 B
Ruby
require_relative '../../spec_helper'
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require 'date'
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describe "DateTime#-" do
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it "is able to subtract sub-millisecond precision values" do
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date = DateTime.new(2017)
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diff = Rational(123456789, 24*60*60*1000*1000)
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((date + diff) - date).should == diff
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(date - (date + diff)).should == -diff
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(date - (date - diff)).should == diff
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((date - diff) - date).should == -diff
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end
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it "correctly calculates sub-millisecond time differences" do #5493
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dt1 = DateTime.new(2018, 1, 1, 0, 0, 30)
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dt2 = DateTime.new(2018, 1, 1, 0, 1, 29.000001)
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((dt2 - dt1) * 24 * 60 * 60).should == 59.000001
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end
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end
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