1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
require 'test/minirunit'
class TestEnumerable
include Enumerable
def initialize(value)
@value = value
end
def each(&block)
@value.each(&block)
end
end
test_equal nil, TestEnumerable.new([]).first
test_equal :foo, TestEnumerable.new([:foo]).first
test_equal [], TestEnumerable.new([[], 1, 2, 3]).first
test_equal [1], TestEnumerable.new([[1], 1, 2, 3]).first
test_equal [], TestEnumerable.new([]).first(0)
test_exception(ArgumentError) do
TestEnumerable.new([]).first(-1)
end
test_equal [], TestEnumerable.new([1,2,3]).first(0)
test_exception(ArgumentError) do
TestEnumerable.new([1,2,3]).first(-1)
end
test_equal [1], TestEnumerable.new([1,2,3]).first(1)
test_equal [1,2], TestEnumerable.new([1,2,3]).first(2)
test_equal [1,2,3], TestEnumerable.new([1,2,3]).first(3)
test_equal [1,2,3], TestEnumerable.new([1,2,3]).first(4)
test_equal({ }, TestEnumerable.new([]).group_by(&:length))
test_equal({5=>["pelle"], 6=>["marcus"], 3=>["ola", "tom"], 4=>["bini", "pele"], 10=>["gustafsson"]},
TestEnumerable.new(%w(ola bini gustafsson pelle tom marcus pele)).group_by(&:length))
test_equal({[5]=>["pelle"], [6]=>["marcus"], [3]=>["ola", "tom"], [4]=>["bini", "pele"], [10]=>["gustafsson"]},
TestEnumerable.new(%w(ola bini gustafsson pelle tom marcus pele)).group_by{ |v| [v.length]})
|
