Module: Bulldogger::Preflight

Defined in:
lib/bulldogger/preflight.rb

Overview

Compares application frames from two isolated command runs. It does not select tests or change command arguments.

Class Method Summary collapse

Class Method Details

.run(command, stdout: $stdout, stderr: $stderr) ⇒ Object 



13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
 
# File 'lib/bulldogger/preflight.rb', line 13

def run(command, stdout: $stdout, stderr: $stderr)
  raise ArgumentError, "preflight requires a command after --" if command.empty?

  first_path = collect(command)
  second_path = collect(command)
  first_frames = application_frames(first_path)
  second_frames = application_frames(second_path)

  if first_frames == second_frames
    stdout.puts "bulldogger preflight: deterministic (app frames: #{first_frames.length})"
    stdout.puts "bulldogger preflight indexes: #{first_path} #{second_path}"
    return 0
  end

  divergence = first_divergence(first_frames, second_frames)
  stdout.puts "bulldogger preflight: first divergence at event #{divergence + 1}"
  stdout.puts "first: #{format_frame(first_frames[divergence])}"
  stdout.puts "second: #{format_frame(second_frames[divergence])}"
  stdout.puts "app frames: #{first_frames.length} and #{second_frames.length}"
  stdout.puts "This test is not eligible for bulldogger re-execution."
  1
rescue SystemCallError, IOError, JSON::ParserError => error
  stderr.puts "bulldogger preflight: failed to start or collect the command: #{error.message}"
  2
end