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# frozen_string_literal: true
module SimpleCov
# Functionally for combining coverage results
#
module Combine
module_function
#
# Combine two coverage based on the given combiner_module.
#
# Combiners should always be called through this interface,
# as it takes care of short-circuiting of one of the coverages is nil.
#
# @return [Hash]
def combine(combiner_module, coverage_a, coverage_b)
return existing_coverage(coverage_a, coverage_b) if empty_coverage?(coverage_a, coverage_b)
combiner_module.combine(coverage_a, coverage_b)
end
def empty_coverage?(coverage_a, coverage_b)
!(coverage_a && coverage_b)
end
def existing_coverage(coverage_a, coverage_b)
coverage_a || coverage_b
end
end
end
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