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#`m` stands for metal, which is a better test/unit test runner that can run
#tests by line number.
#
#[![m ci](https://secure.travis-ci.org/qrush/m.png)](http://travis-ci.org/qrush/m)
#
#![Rush is a heavy metal band. Look it up on Wikipedia.](https://raw.github.com/qrush/m/master/rush.jpg)
#
#<sub>[Rush at the Bristol Colston Hall May 1979](http://www.flickr.com/photos/8507625@N02/3468299995/)</sub>
### Install
#
#Install via:
#
# gem install m
#
#If you're using Bundler, you'll need to include it in your Gemfile. Toss it into the `test` group:
#
# group :test do
# gem 'm', '~> 1.0'
# end
#
#Developing a RubyGem? Add `m` as a development dependency.
#
# Gem::Specification.new do |gem|
# # ...
# gem.add_development_dependency "m", "~> 1.0"
# end
#
#`m` is Ruby 1.9+ only. Sorry, but `method_source`, `sourcify`, and `ruby_parser`
#all have trouble with 1.8 so I'm giving up and only supporting 1.9 for now.
#Patches are welcome!
#
### Usage
#
#Basically, I was sick of using the `-n` flag to grab one test to run. Instead, I
#prefer how RSpec's test runner allows tests to be run by line number.
#
#Given this file:
#
# $ cat -n test/example_test.rb
# 1 require 'test/unit'
# 2
# 3 class ExampleTest < Test::Unit::TestCase
# 4 def test_apple
# 5 assert_equal 1, 1
# 6 end
# 7
# 8 def test_banana
# 9 assert_equal 1, 1
# 10 end
# 11 end
#
#You can run a test by line number, using format `m TEST_FILE:LINE_NUMBER_OF_TEST`:
#
# $ m test/example_test.rb:4
# Run options: -n /test_apple/
#
# # Running tests:
#
# .
#
# Finished tests in 0.000525s, 1904.7619 tests/s, 1904.7619 assertions/s.
#
# 1 tests, 1 assertions, 0 failures, 0 errors, 0 skips
#
#Hit the wrong line number? No problem, `m` helps you out:
#
# $ m test/example_test.rb:2
# No tests found on line 2. Valid tests to run:
#
# test_apple: m test/examples/test_unit_example_test.rb:4
# test_banana: m test/examples/test_unit_example_test.rb:8
#
#Want to run the whole test? Just leave off the line number.
#
# $ m test/example_test.rb
# Run options:
#
# # Running tests:
#
# ..
#
# Finished tests in 0.001293s, 1546.7904 tests/s, 3093.5808 assertions/s.
#
# 1 tests, 2 assertions, 0 failures, 0 errors, 0 skips
#
#### Supports
#
#`m` works with a few Ruby test frameworks:
#
#* `Test::Unit`
#* `ActiveSupport::TestCase`
#* `MiniTest::Unit::TestCase`
#
### License
#
#This gem is MIT licensed, please see `LICENSE` for more information.
### M, your metal test runner
# Maybe this gem should have a longer name? Metal?
module M
VERSION = "1.0.1"
# Accept arguments coming from bin/m and run tests.
def self.run(argv)
Runner.new(argv).run
end
### Runner is in charge of running your tests.
# Instead of slamming all of this junk in an `M` class, it's here instead.
class Runner
def initialize(argv)
@argv = argv
end
# There's two steps to running our tests:
# 1. Parsing the given input for the tests we need to find (or groups of tests)
# 2. Run those tests we found that match what you wanted
def run
parse
execute
end
private
def parse
# With no arguments,
if @argv.empty?
# Just shell out to `rake test`.
exec "rake test"
else
# Parse out ARGV, it should be coming in in a format like `test/test_file.rb:9`
@file, line = @argv.first.split(':')
@line = line.to_i
# If this file is a directory, not a file, run the tests inside of this directory
if Dir.exist?(@file)
# Make a new rake test task with a hopefully unique name, and run every test looking file in it
require "rake/testtask"
Rake::TestTask.new(:m_custom) do |t|
t.libs << 'test'
t.pattern = "#{@file}/*test*.rb"
end
# Invoke the rake task and exit, hopefully it'll work!
Rake::Task['m_custom'].invoke
exit
end
end
end
def execute
# Locate tests to run that may be inside of this line. There could be more than one!
tests_to_run = tests.within(@line)
# If we found any tests,
if tests_to_run.size > 0
# assemble the regexp to run these tests,
test_names = tests_to_run.map(&:name).join('|')
# set up the args needed for the runner
test_arguments = ["-n", "/(#{test_names})/"]
# directly run the tests from here and exit with the status of the tests passing or failing
if defined?(Test)
exit Test::Unit::AutoRunner.run(false, nil, test_arguments)
elsif defined?(MiniTest)
exit MiniTest::Unit.runner.run test_arguments
else
not_supported
end
else
# Otherwise we found no tests on this line, so you need to pick one.
message = "No tests found on line #{@line}. Valid tests to run:\n\n"
# For every test ordered by line number,
# spit out the test name and line number where it starts,
tests.by_line_number do |test|
message << "#{sprintf("%0#{tests.column_size}s", test.name)}: m #{@file}:#{test.start_line}\n"
end
# fail like a good unix process should.
abort message
end
end
# Finds all test suites in this test file, with test methods included.
def suites
# Since we're not using `ruby -Itest -Ilib` to run the tests, we need to add this directory to the `LOAD_PATH`
$:.unshift "./test", "./lib"
begin
# Fire up this Ruby file. Let's hope it actually has tests.
load @file
rescue LoadError => e
# Fail with a happier error message instead of spitting out a backtrace from this gem
abort "Failed loading test file:\n#{e.message}"
end
# Figure out what test framework we're using
if defined?(Test)
suites = Test::Unit::TestCase.test_suites
elsif defined?(MiniTest)
suites = MiniTest::Unit::TestCase.test_suites
else
not_supported
end
# Use some janky internal APIs to group test methods by test suite.
suites.inject({}) do |suites, suite_class|
# End up with a hash of suite class name to an array of test methods, so we can later find them and ignore empty test suites
suites[suite_class] = suite_class.test_methods if suite_class.test_methods.size > 0
suites
end
end
# Shoves tests together in our custom container and collection classes.
# Memoize it since it's unnecessary to do this more than one for a given file.
def tests
@tests ||= begin
require "m/test_collection"
require "m/test_method"
# With each suite and array of tests,
# and with each test method present in this test file,
# shove a new test method into this collection.
suites.inject(TestCollection.new) do |collection, (suite_class, test_methods)|
test_methods.each do |test_method|
collection << TestMethod.create(suite_class, test_method)
end
collection
end
end
end
# Fail loudly if this isn't supported
def not_supported
abort "This test framework is not supported! Please open up an issue at https://github.com/qrush/m !"
end
end
end
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