60 lines
1.5 KiB
Ruby
60 lines
1.5 KiB
Ruby
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module Shoulda # :nodoc:
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module Matchers
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module ActiveModel # :nodoc:
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module NumericalityMatchers
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# Examples:
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# it { should validate_numericality_of(:attr).
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# is_greater_than(6).
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# less_than(20)...(and so on) }
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class ComparisonMatcher < ValidationMatcher
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def initialize(value, operator)
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@value = value
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@operator = operator
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@message = nil
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end
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def for(attribute)
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@attribute = attribute
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self
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end
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def matches?(subject)
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@subject = subject
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disallows_value_of(value_to_compare, @message)
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end
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def allowed_types
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'integer'
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end
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def with_message(message)
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@message = message
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end
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private
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def value_to_compare
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case @operator
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when :> then [@value, @value - 1].sample
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when :>= then @value - 1
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when :== then @value + 1
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when :< then [@value, @value + 1].sample
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when :<= then @value + 1
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end
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end
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def expectation
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case @operator
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when :> then "greater than"
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when :>= then "greater than or equal to"
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when :== then "equal to"
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when :< then "less than"
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when :<= then "less than or equal to"
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end
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end
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end
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end
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end
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end
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end
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