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##
# Enumerable(Ext) Test
assert("Enumerable#drop") do
a = [1, 2, 3, 4, 5, 0]
assert_equal [4, 5, 0], a.drop(3)
assert_equal [], a.drop(6)
end
assert("Enumerable#drop_while") do
a = [1, 2, 3, 4, 5, 0]
assert_equal [3, 4, 5, 0], a.drop_while {|i| i < 3 }
end
assert("Enumerable#take") do
a = [1, 2, 3, 4, 5, 0]
assert_equal [1, 2, 3], a.take(3)
end
assert("Enumerable#take_while") do
a = [1, 2, 3, 4, 5, 0]
assert_equal [1, 2], a.take_while {|i| i < 3}
end
assert("Enumerable#each_cons") do
a = []
(1..5).each_cons(3){|e| a << e}
assert_equal [[1, 2, 3], [2, 3, 4], [3, 4, 5]], a
end
assert("Enumerable#each_slice") do
a = []
(1..10).each_slice(3){|e| a << e}
assert_equal [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10]], a
end
assert("Enumerable#group_by") do
r = (1..6).group_by {|i| i % 3 }
assert_equal [3, 6], r[0]
assert_equal [1, 4], r[1]
assert_equal [2, 5], r[2]
end
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