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30 lines
955 B
Ruby
30 lines
955 B
Ruby
require 'date'
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require_relative '../../spec_helper'
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describe "Date#-" do
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it "subtracts a number of days from a Date" do
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d = Date.civil(2007, 5 ,2) - 13
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d.should == Date.civil(2007, 4, 19)
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end
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it "subtracts a negative number of days from a Date" do
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d = Date.civil(2007, 4, 19).-(-13)
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d.should == Date.civil(2007, 5 ,2)
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end
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it "computes the difference between two dates" do
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(Date.civil(2007,2,27) - Date.civil(2007,2,27)).should == 0
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(Date.civil(2007,2,27) - Date.civil(2007,2,26)).should == 1
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(Date.civil(2006,2,27) - Date.civil(2007,2,27)).should == -365
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(Date.civil(2008,2,27) - Date.civil(2007,2,27)).should == 365
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end
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it "raises an error for non Numeric arguments" do
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-> { Date.civil(2007,2,27) - :hello }.should raise_error(TypeError)
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-> { Date.civil(2007,2,27) - "hello" }.should raise_error(TypeError)
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-> { Date.civil(2007,2,27) - Object.new }.should raise_error(TypeError)
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end
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end
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