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Contents
module Minitest
# Filters backtraces of exceptions that may arise when running tests.
class ExtensibleBacktraceFilter
# Returns the default filter.
#
# The default filter will filter out all Minitest and minitest-reporters
# lines.
#
# @return [Minitest::ExtensibleBacktraceFilter]
def self.default_filter
unless defined? @default_filter
filter = self.new
filter.add_filter(/lib\/minitest/)
@default_filter = filter
end
@default_filter
end
# Creates a new backtrace filter.
def initialize
@filters = []
end
# Adds a filter.
#
# @param [Regex] regex the filter
def add_filter(regex)
@filters << regex
end
# Determines if the string would be filtered.
#
# @param [String] str
# @return [Boolean]
def filters?(str)
@filters.any? { |filter| str =~ filter }
end
# Filters a backtrace.
#
# This will add new lines to the new backtrace until a filtered line is
# encountered. If there were lines added to the new backtrace, it returns
# those lines. However, if the first line in the backtrace was filtered,
# resulting in an empty backtrace, it returns all lines that would have
# been unfiltered. If that in turn does not contain any lines, it returns
# the original backtrace.
#
# @param [Array] backtrace the backtrace to filter
# @return [Array] the filtered backtrace
# @note This logic is based off of Minitest's #filter_backtrace.
def filter(backtrace)
result = []
return result unless backtrace
backtrace.each do |line|
break if filters?(line)
result << line
end
result = backtrace.reject { |line| filters?(line) } if result.empty?
result = backtrace.dup if result.empty?
result
end
end
end
Version data entries
11 entries across 11 versions & 2 rubygems