65 lines
1.3 KiB
Ruby
65 lines
1.3 KiB
Ruby
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require 'yaml'
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require 'equalizer'
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require 'memoizable'
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require 'ice_nine'
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module MutantSpec
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class Warning
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def self.assert_no_warnings
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return if EXTRACTOR.warnings.empty?
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fail UnexpectedWarnings, EXTRACTOR.warnings.to_a
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end
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class UnexpectedWarnings < StandardError
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MSG = 'Unexpected warnings: %s'.freeze
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def initialize(warnings)
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super(MSG % warnings.join("\n"))
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end
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end
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class Extractor < DelegateClass(IO)
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PATTERN = /\A(?:.+):(?:\d+): warning: (?:.+)\n\z/.freeze
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include Equalizer.new(:whitelist, :seen, :io), Memoizable
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def initialize(io, whitelist)
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@whitelist = whitelist
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@seen = Set.new
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@io = io
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super(io)
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end
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def write(message)
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return super if PATTERN !~ message
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add(message.chomp)
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self
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end
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def warnings
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seen.dup
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end
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memoize :warnings
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private
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def add(warning)
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return if whitelist.any?(&warning.public_method(:end_with?))
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seen << warning
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end
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attr_reader :whitelist, :seen, :io
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end
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warnings = Pathname.new(__dir__).join('warnings.yml').freeze
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whitelist = IceNine.deep_freeze(YAML.load(warnings.read))
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EXTRACTOR = Extractor.new(STDERR, whitelist)
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end
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end
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