V2/watchexec feature test (#232)

* Create Watchexec feature specs
* Build watchexec in separate image
* Add command to build watchexec image

.github/workflows/ci.yml

@@ -55,6 +55,7 @@ jobs:
           - rspec-rails
           - rspec-ruby
           - bundler-app
+          - watchexec-ruby-app
     steps:
       - uses: actions/checkout@v4
       - name: Set up Ruby

bin/build/watchexec

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+docker buildx build \
+  --platform linux/amd64,linux/arm64 \
+  -t ghcr.io/alexb52/slim-bullseye-watchexec:latest \
+  -f builds/dockerfiles/WatchexecSlimBullseye \
+  --push .

bin/test/watchexec-ruby-app

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+bundle install
+bundle exec rake build
+# cp -R features/support features/watchexec-ruby-app/retest
+ls -t pkg | head -n1 | xargs -I {} mv pkg/{} features/watchexec-ruby-app/retest.gem
+docker compose -f features/watchexec-ruby-app/docker-compose.yml up --build --exit-code-from retest

builds/dockerfiles/WatchexecSlimBullseye

@@ -0,0 +1,12 @@
+# Stage 1: Build watchexec with Rust
+FROM rust:1.83.0-slim-bullseye AS rust-builder
+
+# Install necessary dependencies for Rust
+RUN apt-get update -qq && \
+    apt-get install --no-install-recommends -y build-essential git
+
+# Install watchexec
+RUN cargo install watchexec-cli
+
+# Verify installation
+RUN watchexec --version

features/watchexec-ruby-app/.gitignore

@@ -0,0 +1,3 @@
+.ruby-version
+retest.gem
+/tmp/*

features/watchexec-ruby-app/Dockerfile

@@ -0,0 +1,33 @@
+FROM ruby:2.7-slim-bullseye
+
+# Install necessary dependencies
+RUN apt-get update -qq && \
+    apt-get install --no-install-recommends -y build-essential git && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# Copy watchexec from the Rust stage
+COPY --from=ghcr.io/alexb52/slim-bullseye-watchexec:latest /usr/local/cargo/bin/watchexec /usr/local/bin/watchexec
+
+# Verify watchexec installation in the final image
+RUN watchexec --version
+
+# throw errors if Gemfile has been modified since Gemfile.lock
+RUN bundle config --global frozen 1
+
+WORKDIR /usr/src/app
+
+ENV LANG C.UTF-8
+ENV BUNDLER_VERSION 2.1
+ENV GEM_HOME="/usr/local/bundle"
+ENV PATH $GEM_HOME/bin:$GEM_HOME/gems/bin:$PATH
+
+COPY Gemfile Gemfile.lock retest.gem ./
+RUN gem update --system 3.2.3
+RUN gem install bundler -v 2.1.4
+RUN bundle config --delete frozen
+RUN bundle install
+RUN gem install retest.gem
+
+COPY . /usr/src/app
+
+CMD ["retest", "--ruby"]

features/watchexec-ruby-app/Gemfile

@@ -0,0 +1,3 @@
+source 'https://rubygems.org'
+gem 'minitest', '~> 5.4'
+gem 'byebug'

features/watchexec-ruby-app/Gemfile.lock

@@ -0,0 +1,15 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    byebug (11.1.3)
+    minitest (5.14.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  byebug
+  minitest (~> 5.4)
+
+BUNDLED WITH
+   2.4.21

features/watchexec-ruby-app/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Alexandre Barret
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

features/watchexec-ruby-app/README.md

@@ -0,0 +1,23 @@
+# 99 Bottles
+
+## Installing Ruby
+
+### Windows
+
+There's an installer, it's easy.
+http://rubyinstaller.org/
+
+### Mac
+
+Newer macs ship with a usable version of Ruby.
+
+Try `ruby -v` in a terminal window, and if it's 1.9.x or 2.x you're fine.
+
+http://www.railstutorial.org/book/beginning#sec-install_ruby
+http://tutorials.jumpstartlab.com/topics/environment/environment.html
+http://docs.railsbridge.org/installfest/macintosh
+
+### Linux
+
+Ubuntu: http://docs.railsbridge.org/installfest/linux
+https://www.ruby-lang.org/en/installation/

features/watchexec-ruby-app/docker-compose.yml

@@ -0,0 +1,9 @@
+services:
+  retest:
+    build: .
+    volumes:
+      - .:/usr/src/app
+    environment:
+      - DEFAULT_SLEEP_SECONDS=1
+      - LAUNCH_SLEEP_SECONDS=1.5
+    command: ruby retest/retest_test.rb

features/watchexec-ruby-app/lib/bottles.rb

@@ -0,0 +1,119 @@
+class CountdownSong
+  attr_reader :verse_template, :max, :min
+
+  def initialize(verse_template:, max: 999999, min: 0)
+    @verse_template = verse_template
+    @max, @min = max, min
+  end
+
+  def song
+    verses(max, min)
+  end
+
+  def verses(upper, lower)
+    upper.downto(lower).collect {|i| verse(i)}.join("\n")
+  end
+
+  def verse(number)
+    verse_template.lyrics(number)
+  end
+end
+
+
+class BottleVerse
+  def self.lyrics(number)
+    new(BottleNumber.for(number)).lyrics
+  end
+
+  attr_reader :bottle_number
+
+  def initialize(bottle_number)
+    @bottle_number = bottle_number
+  end
+
+  def lyrics
+    "#{bottle_number} of beer on the wall, ".capitalize +
+    "#{bottle_number} of beer.\n" +
+    "#{bottle_number.action}, " +
+    "#{bottle_number.successor} of beer on the wall.\n"
+  end
+end
+
+
+class BottleNumber
+  def self.for(number)
+    case number
+    when 0
+      BottleNumber0
+    when 1
+      BottleNumber1
+    when 6
+      BottleNumber6
+    else
+      BottleNumber
+    end.new(number)
+  end
+
+  attr_reader :number
+  def initialize(number)
+    @number = number
+  end
+
+  def to_s
+    "#{quantity} #{container}"
+  end
+
+  def quantity
+    number.to_s
+  end
+
+  def container
+    "bottles"
+  end
+
+  def action
+    "Take #{pronoun} down and pass it around"
+  end
+
+  def pronoun
+    "one"
+  end
+
+  def successor
+    BottleNumber.for(number - 1)
+  end
+end
+
+class BottleNumber0 < BottleNumber
+  def quantity
+    "no more"
+  end
+
+  def action
+    "Go to the store and buy some more"
+  end
+
+  def successor
+    BottleNumber.for(99)
+  end
+end
+
+class BottleNumber1 < BottleNumber
+  def container
+    "bottle"
+  end
+
+  def pronoun
+    "it"
+  end
+end
+
+class BottleNumber6 < BottleNumber
+  def quantity
+    "1"
+  end
+
+  def container
+    "six-pack"
+  end
+end

features/watchexec-ruby-app/retest/retest_test.rb

@@ -0,0 +1,16 @@
+require 'retest'
+require 'byebug'
+require_relative 'support/test_helper'
+require 'minitest/autorun'
+require_relative 'retest_test/file_changes_test'
+require_relative 'retest_test/setup_test'
+require_relative 'retest_test/matching_unmatching_command_test'
+
+$stdout.sync = true
+
+include FileHelper
+include OutputHelper
+
+module WatchexecRuby
+  COMMAND = 'retest'
+end

features/watchexec-ruby-app/retest/retest_test/file_changes_test.rb

@@ -0,0 +1,87 @@
+module WatchexecRuby
+  class FileChangesTest < Minitest::Test
+    def teardown
+      end_retest
+    end
+
+    def test_start_retest
+      launch_retest(COMMAND)
+
+      assert_match <<~EXPECTED, read_output
+        Setup identified: [RUBY]. Using command: 'bundle exec ruby <test>'
+        Watcher: [WATCHEXEC]
+        Launching Retest...
+        Ready to refactor! You can make file changes now
+      EXPECTED
+    end
+
+    def test_modifying_existing_file
+      launch_retest(COMMAND)
+
+      modify_file('lib/bottles.rb')
+
+      read_output do |output|
+        assert_match "Test file: test/bottles_test.rb", output
+        assert_match "12 runs, 12 assertions, 0 failures, 0 errors, 0 skips", output
+      end
+    end
+
+    def test_modifying_existing_test_file
+      launch_retest(COMMAND)
+
+      modify_file('test/bottles_test.rb')
+
+      read_output do |output|
+        assert_match "Test file: test/bottles_test.rb", output
+        assert_match "12 runs, 12 assertions, 0 failures, 0 errors, 0 skips", output
+      end
+    end
+
+    def test_creating_a_new_test_file
+      launch_retest(COMMAND)
+
+      create_file 'foo_test.rb'
+
+      assert_match "Test file: foo_test.rb", read_output
+
+    ensure
+      delete_file 'foo_test.rb'
+    end
+
+    def test_creating_a_new_file
+      launch_retest(COMMAND)
+
+      create_file 'foo.rb'
+      assert_match <<~EXPECTED, read_output
+        FileNotFound - Retest could not find a matching test file to run.
+      EXPECTED
+
+      create_file 'foo_test.rb'
+      assert_match "Test file: foo_test.rb", read_output
+
+      modify_file('lib/bottles.rb')
+      assert_match "Test file: test/bottles_test.rb", read_output
+
+      modify_file('foo.rb')
+      assert_match "Test file: foo_test.rb", read_output
+
+    ensure
+      delete_file 'foo.rb'
+      delete_file 'foo_test.rb'
+    end
+
+    def test_untracked_file
+      create_file 'foo.rb', should_sleep: false
+      create_file 'foo_test.rb', should_sleep: false
+
+      launch_retest(COMMAND)
+
+      modify_file 'foo.rb'
+      assert_match "Test file: foo_test.rb", read_output
+
+    ensure
+      delete_file 'foo.rb'
+      delete_file 'foo_test.rb'
+    end
+  end
+end