test-bot: move to tap.

Migrate to https://github.com/Homebrew/homebrew-test-bot to be able to
work on this with a different, non-tagged workflow.

Library/Homebrew/official_taps.rb

@@ -18,5 +18,6 @@ OFFICIAL_TAPS = %w[
 
 OFFICIAL_CMD_TAPS = {
   "homebrew/bundle" => ["bundle"],
+  "homebrew/test-bot" => ["test-bot"],
   "homebrew/services" => ["services"],
 }.freeze

Library/Homebrew/test/test_cmd_testbot.rb

@@ -1,98 +0,0 @@
-require "pathname"
-
-require "testing_env"
-require "dev-cmd/test-bot"
-
-class TestbotCommandTests < Homebrew::TestCase
-  def test_resolve_test_tap
-    tap = Homebrew.resolve_test_tap
-    assert_nil tap, "Should return nil if no tap slug provided"
-
-    slug = "spam/homebrew-eggs"
-    url = "https://github.com/#{slug}.git"
-    environments = [
-      { "TRAVIS_REPO_SLUG" => slug },
-      { "UPSTREAM_BOT_PARAMS" => "--tap=#{slug}" },
-      { "UPSTREAM_BOT_PARAMS" => "--tap=spam/eggs" },
-      { "UPSTREAM_GIT_URL" => url },
-      { "GIT_URL" => url },
-    ]
-
-    predicate = proc do |message|
-      tap = Homebrew.resolve_test_tap
-      assert_kind_of Tap, tap, message
-      assert_equal tap.user, "spam", message
-      assert_equal tap.repo, "eggs", message
-    end
-
-    environments.each do |pair|
-      with_environment(pair) do
-        predicate.call pair.to_s
-      end
-    end
-
-    ARGV.expects(:value).with("tap").returns(slug)
-    predicate.call "ARGV"
-  end
-end
-
-class TestbotStepTests < Homebrew::TestCase
-  def run
-    [nil, "1"].each do |travis|
-      with_environment("TRAVIS" => travis) { super }
-    end
-    self
-  end
-
-  def teardown
-    return if passed?
-    raise "INFO: Previous test failed with ENV['TRAVIS'] = #{ENV["TRAVIS"].inspect}"
-  end
-
-  def stub_test_instance
-    stub(
-      category: "stub",
-      log_root: Pathname.pwd
-    )
-  end
-
-  def test_step_run_measures_execution_time
-    step = Homebrew::Step.new stub_test_instance, %w[sleep 0.1]
-    shutup do
-      step.run
-    end
-    assert_operator step.time, :>, 0.1
-    assert_operator step.time, :<, 1
-    assert_equal step.passed?, true
-  end
-
-  def test_step_run_observes_failure
-    step = Homebrew::Step.new stub_test_instance, ["false", ""]
-    shutup do
-      step.run
-    end
-    assert_equal step.passed?, false
-    assert_equal step.failed?, true
-  end
-
-  def test_step_dry_run_is_dry_and_always_succeeds
-    step = Homebrew::Step.new stub_test_instance, ["false", ""]
-    ARGV.expects(:include?).with("--dry-run").returns(true)
-    step.stubs(:fork).raises("Dry run isn't dry!")
-    shutup do
-      step.run
-    end
-    assert_equal step.passed?, true
-  end
-
-  def test_step_fail_fast_exits_on_failure
-    step = Homebrew::Step.new stub_test_instance, ["false", ""]
-    ARGV.stubs(:include?).returns(false)
-    ARGV.expects(:include?).with("--fail-fast").returns(true)
-    step.expects(:exit).with(1).returns(nil)
-    shutup do
-      step.run
-    end
-    assert_equal step.passed?, false
-  end
-end

Library/Homebrew/test/test_integration_cmds.rb

@@ -273,8 +273,8 @@ class IntegrationCommandTests < Homebrew::TestCase
                  cmd("help", "cat")) # Internal command (documented, Ruby).
     assert_match(/^brew update /,
                  cmd("help", "update")) # Internal command (documented, Shell).
-    assert_match(/^brew test-bot /,
-                 cmd("help", "test-bot")) # Internal developer command (documented, Ruby).
+    assert_match(/^brew update-test /,
+                 cmd("help", "update-test")) # Internal developer command (documented, Ruby).
   end
 
   def test_config