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# frozen_string_literal: true
module SimpleCov
# Classifies whether lines are relevant for code coverage analysis.
# Comments & whitespace lines, and :nocov: token blocks, are considered not relevant.
class LinesClassifier
RELEVANT = 0
NOT_RELEVANT = nil
WHITESPACE_LINE = /^\s*$/.freeze
COMMENT_LINE = /^\s*#/.freeze
WHITESPACE_OR_COMMENT_LINE = Regexp.union(WHITESPACE_LINE, COMMENT_LINE)
def self.no_cov_line
/^(\s*)#(\s*)(:#{SimpleCov.nocov_token}:)/o
end
def self.no_cov_line?(line)
no_cov_line.match?(line)
rescue ArgumentError
# E.g., line contains an invalid byte sequence in UTF-8
false
end
def self.whitespace_line?(line)
WHITESPACE_OR_COMMENT_LINE.match?(line)
rescue ArgumentError
# E.g., line contains an invalid byte sequence in UTF-8
false
end
def classify(lines)
skipping = false
lines.map do |line|
if self.class.no_cov_line?(line)
skipping = !skipping
NOT_RELEVANT
elsif skipping || self.class.whitespace_line?(line)
NOT_RELEVANT
else
RELEVANT
end
end
end
end
end
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