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require 'date'
require File.expand_path('../../../spec_helper', __FILE__)
describe "Date::Infinity" do
it "should be able to check whether Infinity is zero" do
i = Date::Infinity.new
i.zero?.should == false
end
it "should be able to check whether Infinity is finite" do
i1 = Date::Infinity.new
i1.finite?.should == false
i2 = Date::Infinity.new(-1)
i2.finite?.should == false
i3 = Date::Infinity.new(0)
i3.finite?.should == false
end
it "should be able to check whether Infinity is infinite" do
i1 = Date::Infinity.new
i1.infinite?.should == 1
i2 = Date::Infinity.new(-1)
i2.infinite?.should == -1
i3 = Date::Infinity.new(0)
i3.infinite?.should == nil
end
it "should be able to check whether Infinity is not a number" do
i1 = Date::Infinity.new
i1.nan?.should == false
i2 = Date::Infinity.new(-1)
i2.nan?.should == false
i3 = Date::Infinity.new(0)
i3.nan?.should == true
end
# These checks fail on MRI because of a bug in Date::Infinity#<=>
# Fixed in 1.8.7
ruby_bug "#", "1.8.6" do
it "should be able to compare Infinity objects" do
i1 = Date::Infinity.new
i2 = Date::Infinity.new(-1)
i3 = Date::Infinity.new(0)
i4 = Date::Infinity.new
(i4 <=> i1).should == 0
(i3 <=> i1).should == -1
(i2 <=> i1).should == -1
(i3 <=> i2).should == 1
end
end
# Also fails because of the same bug as the previous spec
# Fixed in 1.8.7
ruby_bug "#", "1.8.6" do
it "should be able to return plus Infinity for abs" do
i1 = Date::Infinity.new
i2 = Date::Infinity.new(-1)
i3 = Date::Infinity.new(0)
(i2.abs <=> i1).should == 0
(i3.abs <=> i1).should == 0
end
end
ruby_bug "#222", "1.8.6" do
it "should be able to use -@ and +@ for Date::Infinity" do
(Date::Infinity.new <=> +Date::Infinity.new).should == 0
(Date::Infinity.new(-1) <=> -Date::Infinity.new).should == 0
end
end
it "should be able to coerce a Date::Infinity object" do
Date::Infinity.new.coerce(1).should == [-1, 1]
Date::Infinity.new(0).coerce(2).should == [0, 0]
Date::Infinity.new(-1).coerce(1.5).should == [1, -1]
end
end
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