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diff --git a/test/test_config.rb b/test/test_config.rb
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+# Copyright (C) 2013, Eric Wong <normalperson@yhbt.net> and all contributors
+# License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt)
+require_relative 'helper'
+require 'rack/lobster'
+
+class TestConfig < Testcase
+  parallelize_me!
+
+  def test_initialize
+    cfg = Yahns::Config.new
+    assert_instance_of Yahns::Config, cfg
+  end
+
+  def test_multi_conf_example
+    tmpdir = Dir.mktmpdir
+
+    # modify the example config file for testing
+    path = "examples/yahns_multi.conf.rb"
+    cfgs = File.read(path)
+    cfgs.gsub!(%r{/path/to/}, "#{tmpdir}/")
+    conf = File.open("#{tmpdir}/yahns_multi.conf.rb", "w")
+    conf.sync = true
+    conf.write(cfgs)
+    File.open("#{tmpdir}/another.ru", "w") do |fp|
+      fp.puts("run Rack::Lobster.new\n")
+    end
+    FileUtils.mkpath("#{tmpdir}/another")
+
+    cfg = GTL.synchronize { Yahns::Config.new(conf.path) }
+    assert_instance_of Yahns::Config, cfg
+  ensure
+    FileUtils.rm_rf(tmpdir) if tmpdir
+  end
+
+  def test_rack_basic_conf_example
+    tmpdir = Dir.mktmpdir
+
+    # modify the example config file for testing
+    path = "examples/yahns_rack_basic.conf.rb"
+    cfgs = File.read(path)
+    cfgs.gsub!(%r{/path/to/}, "#{tmpdir}/")
+    Dir.mkdir("#{tmpdir}/my_app")
+    Dir.mkdir("#{tmpdir}/my_logs")
+    Dir.mkdir("#{tmpdir}/my_pids")
+    conf = File.open("#{tmpdir}/yahns_rack_basic.conf.rb", "w")
+    conf.sync = true
+    conf.write(cfgs)
+    File.open("#{tmpdir}/my_app/config.ru", "w") do |fp|
+      fp.puts("run Rack::Lobster.new\n")
+    end
+    cfg = GTL.synchronize { Yahns::Config.new(conf.path) }
+    assert_instance_of Yahns::Config, cfg
+  ensure
+    FileUtils.rm_rf(tmpdir) if tmpdir
+  end
+end