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# Copyright (C) 2012 Kouhei Sutou <kou@clear-code.com>
#
# License: Ruby's
require "English"
module Test
module Unit
class FaultLocationDetector
def initialize(fault, code_snippet_fetcher)
@fault = fault
@code_snippet_fetcher = code_snippet_fetcher
extract_fault_information
end
def split_backtrace_entry(entry)
match_data = /\A(.+):(\d+)(?::(.*))?\z/.match(entry)
return nil if match_data.nil?
file, line_number, context = match_data.to_a[1..-1]
line_number = line_number.to_i
if /\Ain `(.+?)'/ =~ context
method_name = $1
if /\Ablock (?:\(.+?\) )?in / =~ method_name
method_name = $POSTMATCH
end
else
method_name = nil
end
[file, line_number, context, method_name]
end
def target?(backtrace_entry)
file, line_number, context, method_name =
split_backtrace_entry(backtrace_entry)
_ = context
return false if file.nil?
if @fault_source_location
target_source_location?(file, line_number, method_name)
elsif @fault_method_name
target_method?(method_name)
else
true
end
end
private
def target_source_location?(file, line_number, method_name)
fault_file, fault_line_number = @fault_source_location
return false unless file.end_with?(fault_file)
return false if line_number < fault_line_number
lines = @code_snippet_fetcher.source(file)
return false if lines.nil?
base_indent_level = nil
fault_line_number.step(lines.size) do |current_line_number|
line = lines[current_line_number - 1]
current_indent_level = guess_indent_level(line)
base_indent_level ||= current_indent_level
return true if current_line_number == line_number
if current_line_number == fault_line_number
break if /(?:\send|\})\s*$/ =~ line
else
break if current_indent_level == base_indent_level
end
end
false
end
def target_method?(method_name)
@fault_method_name == method_name
end
def guess_indent_level(line)
if /\A(\s*)/ =~ line
$1.sub(/\t/, " " * 8).count(" ")
else
0
end
end
def extract_fault_information
if @fault.respond_to?(:source_location)
@fault_source_location = @fault.source_location
else
@fault_source_location = nil
end
if @fault.respond_to?(:method_name)
@fault_method_name = @fault.method_name
else
@fault_method_name = nil
end
end
end
end
end
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