class Metrics::Backend::Test::Metric

def emit(value, tags: nil, sample_rate: 1.0)
	unless value.is_a?(Numeric)
		raise ArgumentError, "Value must be numeric!"
	end
	
	tags&.each do |tag|
		raise ArgumentError, "Invalid tag (must be String): #{tag.inspect}!" unless tag.is_a?(String)
		
		# We should let the underlying backend handle any tag limitations, e.g. converting invalid characters to underscores, etc.
		#
		# unless tag =~ VALID_TAG
		# 	raise ArgumentError, "Invalid tag (must match #{VALID_TAG}): #{tag.inspect}!"
		# end
	end
end