Class: FileTailTest

Inherits:
Test::Unit::TestCase
  • Object
show all
Includes:
File::Tail, FileUtils
Defined in:
tests/file_tail_test.rb

Constant Summary

Constants included from File::Tail

File::Tail::VERSION, File::Tail::VERSION_ARRAY, File::Tail::VERSION_BUILD, File::Tail::VERSION_MAJOR, File::Tail::VERSION_MINOR

Instance Attribute Summary

Attributes included from File::Tail

#break_if_eof, #default_bufsize, #interval, #line_separator, #max_interval, #reopen_deleted, #reopen_suspicious, #return_if_eof, #suspicious_interval

Instance Method Summary collapse

Methods included from File::Tail

#after_reopen, #backward, #debug?, #forward, #output_debug_information, #preset_attributes, #read_line, #reopen_file, #restat, #sleep_interval, #tail

Instance Method Details

#append(file, n, size = 70) ⇒ Object (private) 



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# File 'tests/file_tail_test.rb', line 382

def append(file, n, size = 70)
  (1..n).each { |x| file << "#{x} #{"A" * size}\n" }
  file.flush
end

#count(file) ⇒ Object (private) 



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# File 'tests/file_tail_test.rb', line 373

def count(file)
  n = 0
  until file.eof?
    file.readline
    n += 1
  end
  return n
end

#setup ⇒ Object 



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# File 'tests/file_tail_test.rb', line 14

def setup
  @out = File.new(File.join('tmp', "test.#$$"), "wb")
  at_exit { path = @out&.path and rm_f File.expand_path(path) }
  append(@out, 100)
  @in = File.new(@out.path, "rb")
  @in.extend(File::Tail)
  @in.interval            = 0.4
  @in.max_interval        = 0.8
  @in.reopen_deleted      = true # is default
  @in.reopen_suspicious   = true # is default
  @in.suspicious_interval  = 60
end

#teardown ⇒ Object 



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# File 'tests/file_tail_test.rb', line 365

def teardown
  @in.close
  @out.close
  File.unlink(@out.path)
end

#test_backward ⇒ Object 



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# File 'tests/file_tail_test.rb', line 36

def test_backward
  [ 0, 1, 2, 10, 100 ].each do |lines|
    @in.backward(lines)
    assert_equal(lines, count(@in))
  end
  @in.backward(101)
  assert_equal(100, count(@in))
end

#test_backward_small_buffer ⇒ Object 



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# File 'tests/file_tail_test.rb', line 45

def test_backward_small_buffer
  [ 0, 1, 2, 10, 100 ].each do |lines|
    @in.backward(lines, 100)
    assert_equal(lines, count(@in))
  end
  @in.backward(101, 100)
  assert_equal(100, count(@in))
end

#test_backward_small_buffer2 ⇒ Object 



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# File 'tests/file_tail_test.rb', line 54

def test_backward_small_buffer2
  @in.default_bufsize = 100
  [ 0, 1, 2, 10, 100 ].each do |lines|
    @in.backward(lines)
    assert_equal(lines, count(@in))
  end
  @in.backward(101)
  assert_equal(100, count(@in))
end

#test_forward ⇒ Object 



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# File 'tests/file_tail_test.rb', line 27

def test_forward
  [ 0, 1, 2, 10, 100 ].each do |lines|
    @in.forward(lines)
    assert_equal(100 - lines, count(@in))
  end
  @in.forward(101)
  assert_equal(0, count(@in))
end

#test_tail_change ⇒ Object 



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# File 'tests/file_tail_test.rb', line 295

def test_tail_change
  return if File::PATH_SEPARATOR == ';' # Grmpf! Windows...
  @in.forward
  reopened = false
  assert_equal 0, @in.lineno
  @in.after_reopen { |f| reopened = true }
  lines = []
  logger = Thread.new do
    begin
      Timeout::timeout(10) do
        @in.tail(110) do |l|
          lines << l
        end
      end
    rescue Timeout::Error
    end
  end
  appender = Thread.new do
    Timeout::timeout(10) do
      until lines.size == 100
        sleep 0.1
      end
    end
    @out.close
    File.unlink(@out.path)
    @out = File.new(@in.path, "wb")
    append(@out, 10)
  end
  appender.join
  logger.join
  assert_equal(110, lines.size)
  assert reopened
  assert_equal 10, @in.lineno
end

#test_tail_change2 ⇒ Object 



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# File 'tests/file_tail_test.rb', line 330

def test_tail_change2
  return if File::PATH_SEPARATOR == ';' # Grmpf! Windows...
  @in.forward
  reopened = false
  assert_equal 0, @in.lineno
  @in.after_reopen { |f| reopened = true }
  lines = []
  logger = Thread.new do
    begin
      Timeout::timeout(10) do
        @in.tail(110) do |l|
          lines << l
        end
      end
    rescue Timeout::Error
    end
  end
  appender = Thread.new do
    Timeout::timeout(10) do
      until lines.size == 100
        sleep 0.1
      end
    end
    @out.truncate 0
    @out.close
    @out = File.new(@in.path, "wb")
    append(@out, 10)
  end
  appender.join
  logger.join
  assert_equal(110, lines.size)
  assert reopened
  assert_equal 10, @in.lineno
end

#test_tail_remove ⇒ Object 



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# File 'tests/file_tail_test.rb', line 192

def test_tail_remove
  return if File::PATH_SEPARATOR == ';' # Grmpf! Windows...
  @in.backward
  reopened = false
  @in.after_reopen { |f| reopened = true }
  lines = []
  logger = Thread.new do
    begin
      Timeout::timeout(10) do
        @in.tail do |l|
          lines << l
        end
      end
    rescue Timeout::Error
    end
  end
  appender = Thread.new do
    until logger.stop?
      sleep 0.1
    end
    @out.close
    File.unlink(@out.path)
    @out = File.new(@in.path, "wb")
    append(@out, 10)
  end
  appender.join
  logger.join
  assert_equal(10, lines.size)
  assert reopened
end

#test_tail_remove2 ⇒ Object 



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# File 'tests/file_tail_test.rb', line 223

def test_tail_remove2
  return if File::PATH_SEPARATOR == ';' # Grmpf! Windows...
  @in.backward
  reopened = false
  @in.after_reopen { |f| reopened = true }
  lines = []
  logger = Thread.new do
    begin
      Timeout::timeout(10) do
        @in.tail do |l|
          lines << l
        end
      end
    rescue Timeout::Error
    end
  end
  appender = Thread.new do
    until logger.stop?
      sleep 0.1
    end
    @out.close
    File.unlink(@out.path)
    @out = File.new(@in.path, "wb")
    append(@out, 10)
    sleep 1
    append(@out, 10)
    File.unlink(@out.path)
    @out = File.new(@in.path, "wb")
    append(@out, 10)
  end
  appender.join
  logger.join
  assert_equal(30, lines.size)
  assert reopened
end

#test_tail_remove3 ⇒ Object 



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# File 'tests/file_tail_test.rb', line 259

def test_tail_remove3
  return if File::PATH_SEPARATOR == ';' # Grmpf! Windows...
  @in.backward
  reopened = false
  @in.after_reopen { |f| reopened = true }
  lines = []
  logger = Thread.new do
    begin
      Timeout::timeout(10) do
        @in.tail(15) do |l|
          lines << l
        end
      end
    rescue Timeout::Error
    end
  end
  appender = Thread.new do
    until logger.stop?
      sleep 0.1
    end
    @out.close
    File.unlink(@out.path)
    @out = File.new(@in.path, "wb")
    append(@out, 10)
    sleep 1
    append(@out, 10)
    File.unlink(@out.path)
    @out = File.new(@in.path, "wb")
    append(@out, 10)
  end
  appender.join
  logger.join
  assert_equal(15, lines.size)
  assert reopened
end

#test_tail_truncated ⇒ Object 



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# File 'tests/file_tail_test.rb', line 165

def test_tail_truncated
  @in.backward
  lines = []
  logger = Thread.new do
    begin
      Timeout::timeout(10) do
        @in.tail do |l|
          lines << l
        end
      end
    rescue Timeout::Error
    end
  end
  appender = Thread.new do
    until logger.stop?
      sleep 0.1
    end
    @out.close
    File.truncate(@out.path, 0)
    @out = File.new(@in.path, "ab")
    append(@out, 10)
  end
  appender.join
  logger.join
  assert_equal(10, lines.size)
end

#test_tail_with_block_with_n ⇒ Object 



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# File 'tests/file_tail_test.rb', line 95

def test_tail_with_block_with_n
  Timeout::timeout(10) do
    @in.backward(1)
    lines = []
    Timeout::timeout(1) { @in.tail(0) { |l| lines << l } }
    assert_equal(0, lines.size)
    #
    @in.backward(1)
    lines = []
    Timeout::timeout(1) { @in.tail(1) { |l| lines << l } }
    assert_equal(1, lines.size)
    #
    @in.backward(10)
    lines = []
    Timeout::timeout(1) { @in.tail(10) { |l| lines << l } }
    assert_equal(10, lines.size)
    #
    @in.backward(100)
    lines = []
    @in.backward(1)
    assert_raises(Timeout::Error) do
      Timeout::timeout(1) { @in.tail(2) { |l| lines << l } }
    end
    assert_equal(1, lines.size)
    #
  end
end

#test_tail_with_block_without_n ⇒ Object 



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# File 'tests/file_tail_test.rb', line 64

def test_tail_with_block_without_n
  Timeout::timeout(10) do
    lines = []
    @in.backward(1)
    assert_raises(Timeout::Error) do
      Timeout::timeout(1) { @in.tail { |l| lines << l } }
    end
    assert_equal(1, lines.size)
    #
    lines = []
    @in.backward(10)
    assert_raises(Timeout::Error) do
      Timeout::timeout(1) { @in.tail { |l| lines << l } }
    end
    assert_equal(10, lines.size)
    #
    lines = []
    @in.backward(100)
    assert_raises(Timeout::Error) do
      Timeout::timeout(1) { @in.tail { |l| lines << l } }
    end
    assert_equal(100, lines.size)
    #
    lines = []
    @in.backward(101)
    assert_raises(Timeout::Error) do
      Timeout::timeout(1) { @in.tail { |l| lines << l } }
    end
  end
end

#test_tail_withappend ⇒ Object 



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# File 'tests/file_tail_test.rb', line 150

def test_tail_withappend
  @in.backward
  lines = []
  logger = Thread.new do
    begin
      Timeout::timeout(1) { @in.tail { |l| lines << l } }
    rescue Timeout::Error
    end
  end
  appender = Thread.new { append(@out, 10) }
  appender.join
  logger.join
  assert_equal(10, lines.size)
end

#test_tail_without_block_with_n ⇒ Object 



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# File 'tests/file_tail_test.rb', line 123

def test_tail_without_block_with_n
  Timeout::timeout(10) do
    @in.backward(1)
    lines = []
    Timeout::timeout(1) { lines += @in.tail(0) }
    assert_equal(0, lines.size)
    #
    @in.backward(1)
    lines = []
    Timeout::timeout(1) { lines += @in.tail(1) }
    assert_equal(1, lines.size)
    #
    @in.backward(10)
    lines = []
    Timeout::timeout(1) { lines += @in.tail(10) }
    assert_equal(10, lines.size)
    #
    @in.backward(100)
    lines = []
    @in.backward(1)
    assert_raises(Timeout::Error) do
      Timeout::timeout(1) { lines += @in.tail(2) }
    end
    assert_equal(0, lines.size)
  end
end