Yannick Francois
41 lines
727 B
Ruby
41 lines
727 B
Ruby
require 'test/unit'
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DUCK="duck"
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ELEPHANT="elephant"
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SNAKE="snake"
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FILE="test_file"
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class TestFileConcurrencyAccess < Test::Unit::TestCase
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def test_concurrency_access
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t1 = Thread.start do
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File.open(FILE, "w") do |file|
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file.puts SNAKE
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file.flush
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sleep 8
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file.puts DUCK
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end
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end
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File.open(FILE,"r") do |f1|
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assert SNAKE, f1.read
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end
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t2 = Thread.start do
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File.open(FILE,"w") do |f|
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sleep 2
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f.puts ELEPHANT
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end
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end
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t2.join
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File.open(FILE,"r") do |f2|
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assert ELEPHANT, f2.read
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end
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t1.join
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File.open(FILE,"r") do |f3|
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assert SNAKE, f3.readline
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assert DUCK, f3.readline
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end
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end
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end
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