Add some basic end-to-end tests

Part of #1

.gitignore

@@ -1,2 +1,4 @@
 *.gem
+dump.rdb
 Gemfile.lock
+spec/examples.txt

.rspec

@@ -0,0 +1,2 @@
+--require spec_helper
+--format progress

Rakefile

@@ -0,0 +1,9 @@
+require "rake/testtask"
+
+Rake::TestTask.new do |t|
+  t.libs << "test"
+  t.test_files = FileList['test/test*.rb']
+  t.verbose = true
+end
+
+task default: :test

rspecq.gemspec

@@ -15,6 +15,7 @@ Gem::Specification.new do |s|
   s.add_dependency "rspec-core"
   s.add_dependency "redis"
 
-  s.add_development_dependency "minitest", "~> 5.14"
   s.add_development_dependency "rake"
+  s.add_development_dependency "pry-byebug"
+  s.add_development_dependency "minitest"
 end

test/helpers.rb

@@ -0,0 +1,35 @@
+require "securerandom"
+
+module Helpers
+  REDIS_HOST = "127.0.0.1".freeze
+
+  def rand_id
+    SecureRandom.hex(4)
+  end
+
+  def exec_build(path)
+    worker_id = rand_id
+    build_id = rand_id
+
+    Dir.chdir(File.join("test", "sample_suites", path)) do
+      `bundle exec rspecq --worker #{worker_id} --build #{build_id}`
+    end
+    assert_equal 0, $?.exitstatus
+
+    queue = RSpecQ::Queue.new(build_id, worker_id, REDIS_HOST)
+    assert_queue_well_formed(queue)
+
+    return queue
+  end
+
+  def assert_queue_well_formed(queue, msg=nil)
+    redis = queue.redis
+    heartbeats = redis.zrange(
+      queue.send(:key_worker_heartbeats), 0, -1, withscores: true)
+
+    assert queue.published?
+    assert queue.exhausted?
+    assert_operator heartbeats.size, :>=, 0
+    assert heartbeats.all? { |hb| Time.at(hb.last) <= Time.now }
+  end
+end

test/sample_suites/README

@@ -0,0 +1 @@
+Sample RSpec suites, used as fixtures in the tests.

test/sample_suites/failing_suite/spec/bar_spec.rb

@@ -0,0 +1,4 @@
+RSpec.describe do
+  it { expect(false).to be false }
+  it { expect(1).to be 2 }
+end

test/sample_suites/failing_suite/spec/foo_spec.rb

@@ -0,0 +1,3 @@
+RSpec.describe do
+  it { expect(true).to be true }
+end

test/sample_suites/flakey_suite/spec/foo_spec.rb

@@ -0,0 +1,8 @@
+RSpec.describe do
+  it do
+    $tries ||= 0
+    $tries += 1
+
+    expect($tries).to eq 3
+  end
+end

test/sample_suites/passing_suite/spec/foo_spec.rb

@@ -0,0 +1,3 @@
+RSpec.describe do
+  it { expect(true).to be true }
+end

test/test_e2e.rb

@@ -0,0 +1,48 @@
+require "minitest/autorun"
+require "rspecq"
+require "helpers"
+
+class TestEndToEnd < Minitest::Test
+  include Helpers
+
+  def setup
+    Redis.new(host: REDIS_HOST).flushdb
+  end
+
+  def test_suite_with_legit_failures
+    queue = exec_build("failing_suite")
+
+    refute queue.build_successful?
+
+    assert_equal [
+      "./spec/foo_spec.rb",
+      "./spec/bar_spec.rb",
+      "./spec/bar_spec.rb[1:2]",
+    ].sort, queue.processed_jobs.sort
+
+   assert_equal 3+RSpecQ::MAX_REQUEUES, queue.example_count
+
+   assert_equal({ "./spec/bar_spec.rb[1:2]" => "3" }, queue.requeued_jobs)
+  end
+
+  def test_passing_suite
+    queue = exec_build("passing_suite")
+
+    assert queue.build_successful?
+    assert_equal 1, queue.example_count
+    assert_empty queue.requeued_jobs
+    assert_equal ["./spec/foo_spec.rb"], queue.processed_jobs
+  end
+
+  def test_flakey_suite
+    queue = exec_build("flakey_suite")
+
+    assert queue.build_successful?
+    assert_equal [
+      "./spec/foo_spec.rb",
+      "./spec/foo_spec.rb[1:1]",
+    ].sort, queue.processed_jobs.sort
+
+    assert_equal({ "./spec/foo_spec.rb[1:1]" => "2" }, queue.requeued_jobs)
+  end
+end