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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe 'Comparable#clamp' do
it 'raises an Argument error unless given 2 parameters' do
c = ComparableSpecs::Weird.new(0)
-> { c.clamp(c) }.should raise_error(ArgumentError)
-> { c.clamp(c, c, c) }.should raise_error(ArgumentError)
end
it 'raises an Argument error unless the 2 parameters are correctly ordered' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
c = ComparableSpecs::Weird.new(3)
-> { c.clamp(two, one) }.should raise_error(ArgumentError)
one.should_receive(:<=>).any_number_of_times.and_return(nil)
-> { c.clamp(one, two) }.should raise_error(ArgumentError)
end
it 'returns self if within the given parameters' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
three = ComparableSpecs::WithOnlyCompareDefined.new(3)
c = ComparableSpecs::Weird.new(2)
c.clamp(one, two).should equal(c)
c.clamp(two, two).should equal(c)
c.clamp(one, three).should equal(c)
c.clamp(two, three).should equal(c)
end
it 'returns the min parameter if smaller than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
c = ComparableSpecs::Weird.new(0)
c.clamp(one, two).should equal(one)
end
it 'returns the max parameter if greater than it' do
one = ComparableSpecs::WithOnlyCompareDefined.new(1)
two = ComparableSpecs::WithOnlyCompareDefined.new(2)
c = ComparableSpecs::Weird.new(3)
c.clamp(one, two).should equal(two)
end
end
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