# File test/kb_stdlib_extensions_test.rb, line 6
 6:   def setup
 7:     @num_array = [2,4,6,3,5,1]
 8:     @string_array = ['az', 'cx', 'by', 'dw']
 9:     @rec_array = [['c', 2], ['a', 2], ['d', 1], ['b', 1]]
10:   end

    # File test/kb_stdlib_extensions_test.rb, line 12
12:   def test_array_sort_by
13:     assert_equal [1,2,3,4,5,6], @num_array.sort_by(:to_i)
14:     assert_equal [1,2,3,4,5,6], @num_array.sort_by{|x| x.to_i}
15:     assert_equal ['dw', 'cx', 'by', 'az'], @string_array.sort_by(:reverse)
16:     assert_equal ['az', 'by', 'cx', 'dw'], @string_array.sort_by{|x| x[0..0]}
17:   end

    # File test/kb_stdlib_extensions_test.rb, line 19
19:   def test_array_sort_by!
20:     @num_array.sort_by!(:to_i)
21:     assert_equal [1,2,3,4,5,6], @num_array
22:   end

    # File test/kb_stdlib_extensions_test.rb, line 24
24:   def test_array_stable_sort
25:     assert_equal [['a', 2], ['b', 1], ['c', 2], ['d', 1]], @rec_array.stable_sort
26:   end

    # File test/kb_stdlib_extensions_test.rb, line 28
28:   def test_array_stable_sort_by
29:     assert_equal [['d', 1], ['b', 1], ['c', 2], ['a', 2]], @rec_array.stable_sort_by(:last)
30:   end

    # File test/kb_stdlib_extensions_test.rb, line 32
32:   def test_object_in
33:     assert 1.in(@num_array)
34:     assert !1.in(@string_array)
35:     assert 1.in(1)
36:     assert 1.in(1,2,3)
37:   end