Split tests for Array#shuffle and Array#sample

test/ruby/test_array.rb

@@ -2980,7 +2980,9 @@ class TestArray < Test::Unit::TestCase
     assert_raise(RangeError) {
       [*0..2].shuffle(random: gen)
     }
+  end
 
+  def test_shuffle_random_clobbering
     ary = (0...10000).to_a
     gen = proc do
       ary.replace([])
@@ -2990,7 +2992,9 @@ class TestArray < Test::Unit::TestCase
       alias rand call
     end
     assert_raise(RuntimeError) {ary.shuffle!(random: gen)}
+  end
 
+  def test_shuffle_random_zero
     zero = Object.new
     def zero.to_int
       0
@@ -3003,7 +3007,10 @@ class TestArray < Test::Unit::TestCase
     end
     ary = (0...10000).to_a
     assert_equal(ary.rotate, ary.shuffle(random: gen_to_int))
+  end
 
+  def test_shuffle_random_invalid_generator
+    ary = (0...10).to_a
     assert_raise(NoMethodError) {
       ary.shuffle(random: Object.new)
     }
@@ -3020,7 +3027,9 @@ class TestArray < Test::Unit::TestCase
         assert_include([0, 1, 2], sample)
       }
     end
+  end
 
+  def test_sample_statistics
     srand(0)
     a = (1..18).to_a
     (0..20).each do |n|
@@ -3037,9 +3046,13 @@ class TestArray < Test::Unit::TestCase
       end
       assert_operator(h.values.min * 2, :>=, h.values.max) if n != 0
     end
+  end
 
+  def test_sample_invalid_argument
     assert_raise(ArgumentError, '[ruby-core:23374]') {[1, 2].sample(-1)}
+  end
 
+  def test_sample_random_srand0
     gen = Random.new(0)
     srand(0)
     a = (1..18).to_a
@@ -3048,13 +3061,15 @@ class TestArray < Test::Unit::TestCase
         assert_equal(a.sample(n), a.sample(n, random: gen), "#{i}/#{n}")
       end
     end
+  end
 
+  def test_sample_unknown_keyword
     assert_raise_with_message(ArgumentError, /unknown keyword/) do
       [0, 1, 2].sample(xawqij: "a")
     end
   end
 
-  def test_sample_random
+  def test_sample_random_generator
     ary = (0...10000).to_a
     assert_raise(ArgumentError) {ary.sample(1, 2, random: nil)}
     gen0 = proc do |max|
@@ -3097,7 +3112,9 @@ class TestArray < Test::Unit::TestCase
     assert_equal([5000, 0, 5001, 2, 5002, 4, 5003, 6, 5004, 8, 5005], ary.sample(11, random: gen0))
     ary.sample(11, random: gen1) # implementation detail, may change in the future
     assert_equal([], ary)
+  end
 
+  def test_sample_random_generator_half
     half = Object.new
     def half.to_int
       5000
@@ -3110,7 +3127,10 @@ class TestArray < Test::Unit::TestCase
     end
     ary = (0...10000).to_a
     assert_equal(5000, ary.sample(random: gen_to_int))
+  end
 
+  def test_sample_random_invalid_generator
+    ary = (0..10).to_a
     assert_raise(NoMethodError) {
       ary.sample(random: Object.new)
     }