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https://github.com/mruby/mruby
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dearblue
80fe9838d2
* The `Fixnum` constant is now an alias for the `Integer` class. * Remove `struct mrb_state::fixnum_class` member. If necessary, use `struct mrb_state::integer_class` instead.
123 lines
3.0 KiB
Ruby
123 lines
3.0 KiB
Ruby
##
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# Random Test
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assert("Random.new") do
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r1 = Random.new(123)
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r2 = Random.new(123)
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r3 = Random.new(124)
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assert_equal(r1.rand, r2.rand)
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assert_not_equal(r1.rand, r3.rand)
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end
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assert("Kernel.srand") do
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srand(234)
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r1 = rand
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srand(234)
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r2 = rand
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srand(235)
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r3 = rand
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assert_equal(r1, r2)
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assert_not_equal(r1, r3)
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end
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assert("Random.srand") do
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Random.srand(345)
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r1 = rand
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srand(345)
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r2 = Random.rand
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Random.srand(346)
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r3 = rand
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assert_equal(r1, r2)
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assert_not_equal(r1, r3)
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end
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assert("return class of Kernel.rand") do
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assert_kind_of(Integer, rand(3))
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assert_kind_of(Integer, rand(1.5))
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assert_kind_of(Float, rand)
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assert_kind_of(Float, rand(0.5))
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end
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assert("Array#shuffle") do
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orig = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
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ary = orig.dup
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shuffled = ary.shuffle
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assert_equal(orig, ary)
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assert_not_equal(ary, shuffled)
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assert_equal(orig, shuffled.sort)
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end
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assert('Array#shuffle!') do
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orig = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
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ary = orig.dup
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assert_same(ary, ary.shuffle!)
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assert_not_equal(orig, ary)
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assert_equal(orig, ary.sort)
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end
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assert("Array#shuffle(random)") do
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assert_raise(TypeError) do
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# this will cause an exception due to the wrong argument
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[1, 2].shuffle "Not a Random instance"
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end
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# verify that the same seed causes the same results
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ary = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
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shuffled1 = ary.shuffle Random.new 345
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shuffled2 = ary.shuffle Random.new 345
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shuffled3 = ary.shuffle Random.new 346
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assert_equal(shuffled1, shuffled2)
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assert_not_equal(shuffled1, shuffled3)
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end
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assert('Array#shuffle!(random)') do
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assert_raise(TypeError) do
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# this will cause an exception due to the wrong argument
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[1, 2].shuffle! "Not a Random instance"
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end
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# verify that the same seed causes the same results
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ary1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
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ary1.shuffle! Random.new 345
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ary2 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
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ary2.shuffle! Random.new 345
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ary3 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
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ary3.shuffle! Random.new 346
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assert_equal(ary1, ary2)
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assert_not_equal(ary1, ary3)
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end
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assert('Array#sample') do
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100.times do
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assert_include([0, 1, 2], [2, 1, 0].sample)
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[2, 1, 0].sample(2).each { |sample| assert_include([0, 1, 2], sample) }
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h = {}
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(1..10).to_a.sample(7).each do |sample|
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assert_not_include(h, sample)
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h[sample] = true
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end
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end
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assert_nil([].sample)
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assert_equal([], [].sample(1))
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assert_equal([], [2, 1].sample(0))
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assert_raise(TypeError) { [2, 1].sample(true) }
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assert_raise(ArgumentError) { [2, 1].sample(-1) }
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end
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assert('Array#sample(random)') do
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assert_raise(TypeError) do
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# this will cause an exception due to the wrong argument
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[1, 2].sample(2, "Not a Random instance")
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end
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# verify that the same seed causes the same results
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ary = (1..10).to_a
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srand(15)
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samples1 = ary.sample(4)
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samples2 = ary.sample(4, Random.new(15))
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samples3 = ary.sample(4, Random.new(16))
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assert_equal(samples1, samples2)
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assert_not_equal(samples1, samples3)
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end
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