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require_relative '../../spec_helper'
require 'date'
describe "Date#prev_month" do
it "returns previous month" do
d = Date.new(2000, 9, 1).prev_month
d.should == Date.new(2000, 8, 1)
end
it "returns three months ago" do
d = Date.new(2000, 10, 1).prev_month(3)
d.should == Date.new(2000, 7, 1)
end
it "returns three months ago across years" do
d = Date.new(2000, 1, 1).prev_month(3)
d.should == Date.new(1999, 10, 1)
end
it "returns last day of month two months ago" do
d = Date.new(2000, 3, 31).prev_month(2)
d.should == Date.new(2000, 1, 31)
end
it "returns last day of previous month when same day does not exist" do
d = Date.new(2001, 3, 30).prev_month
d.should == Date.new(2001, 2, 28)
end
end
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