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