Module: RailsTestServing::Utilities

Included in:
Server
Defined in:
lib/rails_test_serving/utilities.rb

Instance Method Summary collapse

Instance Method Details

#capture_standard_stream(name) ⇒ Object 



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# File 'lib/rails_test_serving/utilities.rb', line 20

def capture_standard_stream(name)
  eval("old, $std#{name} = $std#{name}, StringIO.new")
  begin
    yield
    return eval("$std#{name}").string
  ensure
    eval("$std#{name} = old")
  end
end

#capture_testrunner_result ⇒ Object 



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# File 'lib/rails_test_serving/utilities.rb', line 30

def capture_testrunner_result
  set_default_testrunner_stream(io = StringIO.new) { yield }
  io.string
end

#find_index_by_pattern(enumerable, pattern) ⇒ Object 



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# File 'lib/rails_test_serving/utilities.rb', line 95

def find_index_by_pattern(enumerable, pattern)
  enumerable.each_with_index do |element, index|
    return index if pattern === element
  end
  nil
end

#fix_objectspace_collector ⇒ Object

The stock ObjectSpace collector collects every single class that inherits from Test::Unit, including those which have just been unassigned from their constant and not yet garbage collected. This method fixes that behaviour by filtering out these soon-to-be-garbage-collected classes.



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# File 'lib/rails_test_serving/utilities.rb', line 65

def fix_objectspace_collector
  require 'test/unit/collector/objectspace'

  Test::Unit::Collector::ObjectSpace.class_eval do
    alias_method :old_collect, :collect
    def collect(name)
      tests = []
      ConstantManagement.subclasses_of(Test::Unit::TestCase, :legit => true).each { |klass| add_suite(tests, klass.suite) }
      suite = Test::Unit::TestSuite.new(name)
      sort(tests).each { |t| suite << t }
      suite
    end
  end

  begin
    return yield
  ensure
    Test::Unit::Collector::ObjectSpace.class_eval do
      alias_method :collect, :old_collect
      remove_method :old_collect
    end
  end
end

#log(message, stream = $stdout) ⇒ Object 



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# File 'lib/rails_test_serving/utilities.rb', line 3

def log(message, stream=$stdout)
  print = lambda do |str|
    stream.print(str)
    stream.flush
  end

  print[message]
  if block_given?
    result = nil
    elapsed = Benchmark.realtime do
      result = yield
    end
    print[" (%d ms)\n" % (elapsed * 1000)]
    result
  end
end

#set_default_testrunner_stream(io) ⇒ Object

The default output stream of TestRunner is STDOUT which cannot be captured and, as a consequence, neither can TestRunner output when not instantiated explicitely. The following method can change the default output stream argument so that it can be set to a stream that can be captured instead.



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# File 'lib/rails_test_serving/utilities.rb', line 39

def set_default_testrunner_stream(io)
  require 'test/unit/ui/console/testrunner'

  Test::Unit::UI::Console::TestRunner.class_eval do
    alias_method :old_initialize, :initialize
    def initialize(suite, output_level, io=Thread.current["test_runner_io"])
      old_initialize(suite, output_level, io)
    end
  end
  Thread.current["test_runner_io"] = io

  begin
    return yield
  ensure
    Thread.current["test_runner_io"] = nil
    Test::Unit::UI::Console::TestRunner.class_eval do
      alias_method :initialize, :old_initialize
      remove_method :old_initialize
    end
  end
end

#shorten_path(path) ⇒ Object 



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# File 'lib/rails_test_serving/utilities.rb', line 89

def shorten_path(path)
  shortenable, base = File.expand_path(path), File.expand_path(Dir.pwd)
  attempt = shortenable.sub(/^#{Regexp.escape base + File::SEPARATOR}/, '')
  attempt.length < path.length ? attempt : path
end