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# -*- encoding: binary -*-
require 'test/unit'
require 'raindrops'
require 'tempfile'
class TestRaindrops < Test::Unit::TestCase
def test_raindrop_counter_max
assert_kind_of Integer, Raindrops::MAX
assert Raindrops::MAX > 0
printf "Raindrops::MAX = 0x%x\n", Raindrops::MAX
end
def test_raindrop_size
assert_kind_of Integer, Raindrops::SIZE
assert Raindrops::SIZE > 0
puts "Raindrops::SIZE = #{Raindrops::SIZE}"
end
def test_page_size
assert_kind_of Integer, Raindrops::PAGE_SIZE
assert Raindrops::PAGE_SIZE > Raindrops::SIZE
end
def test_size_and_capa
rd = Raindrops.new(4)
assert_equal 4, rd.size
assert rd.capa >= rd.size
end
def test_ary
rd = Raindrops.new(4)
assert_equal [0, 0, 0, 0] , rd.to_ary
end
def test_incr_no_args
rd = Raindrops.new(4)
assert_equal 1, rd.incr(0)
assert_equal [1, 0, 0, 0], rd.to_ary
end
def test_incr_args
rd = Raindrops.new(4)
assert_equal 6, rd.incr(3, 6)
assert_equal [0, 0, 0, 6], rd.to_ary
end
def test_decr_args
rd = Raindrops.new(4)
rd[3] = 6
assert_equal 5, rd.decr(3, 1)
assert_equal [0, 0, 0, 5], rd.to_ary
end
def test_incr_shared
rd = Raindrops.new(2)
5.times do
pid = fork { rd.incr(1) }
_, status = Process.waitpid2(pid)
assert status.success?
end
assert_equal [0, 5], rd.to_ary
end
def test_incr_decr
rd = Raindrops.new(1)
fork { 1000000.times { rd.incr(0) } }
1000.times { rd.decr(0) }
statuses = Process.waitall
statuses.each { |pid, status| assert status.success? }
assert_equal [999000], rd.to_ary
end
def test_bad_incr
rd = Raindrops.new(1)
assert_raises(ArgumentError) { rd.incr(-1) }
assert_raises(ArgumentError) { rd.incr(2) }
assert_raises(ArgumentError) { rd.incr(0xffffffff) }
end
def test_dup
@rd = Raindrops.new(1)
rd = @rd.dup
assert_equal 1, @rd.incr(0)
assert_equal 1, rd.incr(0)
assert_equal 2, rd.incr(0)
assert_equal 2, rd[0]
assert_equal 1, @rd[0]
end
def test_clone
@rd = Raindrops.new(1)
rd = @rd.clone
assert_equal 1, @rd.incr(0)
assert_equal 1, rd.incr(0)
assert_equal 2, rd.incr(0)
assert_equal 2, rd[0]
assert_equal 1, @rd[0]
end
def test_big
expect = (1..256).map { 0 }
rd = Raindrops.new(256)
assert_equal expect, rd.to_ary
assert_nothing_raised { rd[255] = 5 }
assert_equal 5, rd[255]
assert_nothing_raised { rd[2] = 2 }
expect[255] = 5
expect[2] = 2
assert_equal expect, rd.to_ary
end
def test_resize
rd = Raindrops.new(4)
assert_equal 4, rd.size
assert_equal rd.capa, rd.size = rd.capa
assert_equal rd.capa, rd.to_ary.size
assert_equal 0, rd[rd.capa - 1]
assert_equal 1, rd.incr(rd.capa - 1)
assert_raises(ArgumentError) { rd[rd.capa] }
end
def test_resize_mremap
rd = Raindrops.new(4)
assert_equal 4, rd.size
old_capa = rd.capa
rd.size = rd.capa + 1
assert_equal old_capa * 2, rd.capa
# mremap() is currently broken with MAP_SHARED
# https://bugzilla.kernel.org/show_bug.cgi?id=8691
assert_equal 0, rd[old_capa]
assert_equal rd.capa, rd.to_ary.size
assert_equal 0, rd[rd.capa - 1]
assert_equal 1, rd.incr(rd.capa - 1)
assert_raises(ArgumentError) { rd[rd.capa] }
rescue RangeError
end # if RUBY_PLATFORM =~ /linux/
def test_evaporate
rd = Raindrops.new 1
assert_nil rd.evaporate!
assert_raises(StandardError) { rd.evaporate! }
end
def test_evaporate_with_fork
tmp = Raindrops.new 2
pid = fork do
tmp.incr 0
exit(tmp.evaporate! == nil)
end
_, status = Process.waitpid2(pid)
assert status.success?
assert_equal [ 1, 0 ], tmp.to_ary
tmp.incr 1
assert_equal [ 1, 1 ], tmp.to_ary
pid = fork do
tmp.incr 1
exit([ 1, 2 ] == tmp.to_ary)
end
_, status = Process.waitpid2(pid)
assert status.success?
assert_equal [ 1, 2 ], tmp.to_ary
end
def test_io_backed
file = Tempfile.new('test_io_backed')
rd = Raindrops.new(4, io: file, zero: true)
rd[0] = 123
rd[1] = 456
assert_equal 123, rd[0]
assert_equal 456, rd[1]
rd.evaporate!
file.rewind
data = file.read
assert_equal 123, data.unpack('L!')[0]
assert_equal 456, data[Raindrops::SIZE..data.size].unpack('L!')[0]
end
def test_io_backed_reuse
file = Tempfile.new('test_io_backed')
rd = Raindrops.new(4, io: file, zero: true)
rd[0] = 123
rd[1] = 456
rd.evaporate!
rd = Raindrops.new(4, io: file, zero: false)
assert_equal 123, rd[0]
assert_equal 456, rd[1]
end
def test_iobacked_noreuse
file = Tempfile.new('test_io_backed')
rd = Raindrops.new(4, io: file, zero: true)
rd[0] = 123
rd[1] = 456
rd.evaporate!
rd = Raindrops.new(4, io: file, zero: true)
assert_equal 0, rd[0]
assert_equal 0, rd[1]
end
end
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