class Test::Unit::FaultLocationDetector

# File lib/test/unit/fault-location-detector.rb, line 10
def initialize(fault, code_snippet_fetcher)
  @fault = fault
  @code_snippet_fetcher = code_snippet_fetcher
  extract_fault_information
end

# File lib/test/unit/fault-location-detector.rb, line 16
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

# File lib/test/unit/fault-location-detector.rb, line 32
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

# File lib/test/unit/fault-location-detector.rb, line 85
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

# File lib/test/unit/fault-location-detector.rb, line 77
def guess_indent_level(line)
  if /\A(\s*)/ =~ line
    $1.sub(/\t/, " " * 8).count(" ")
  else
    0
  end
end

# File lib/test/unit/fault-location-detector.rb, line 73
def target_method?(method_name)
  @fault_method_name == method_name
end

# File lib/test/unit/fault-location-detector.rb, line 48
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