You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
1.8 KiB
85 lines
1.8 KiB
require File.expand_path(File.dirname(__FILE__) + '/edgecase')
|
|
|
|
class AboutArrays < EdgeCase::Koan
|
|
def test_creating_arrays
|
|
empty_array = Array.new
|
|
assert_equal __, empty_array.class
|
|
assert_equal __, empty_array.size
|
|
end
|
|
|
|
def test_array_literals
|
|
array = Array.new
|
|
assert_equal [], array
|
|
|
|
array[0] = 1
|
|
assert_equal [1], array
|
|
|
|
array[1] = 2
|
|
assert_equal [1, __], array
|
|
|
|
array << 333
|
|
assert_equal __, array
|
|
end
|
|
|
|
def test_accessing_array_elements
|
|
array = [:peanut, :butter, :and, :jelly]
|
|
|
|
assert_equal __, array[0]
|
|
assert_equal __, array.first
|
|
assert_equal __, array[3]
|
|
assert_equal __, array.last
|
|
assert_equal __, array[-1]
|
|
assert_equal __, array[-3]
|
|
end
|
|
|
|
def test_slicing_arrays
|
|
array = [:peanut, :butter, :and, :jelly]
|
|
|
|
assert_equal __, array[0,1]
|
|
assert_equal __, array[0,2]
|
|
assert_equal __, array[2,2]
|
|
assert_equal __, array[2,20]
|
|
assert_equal __, array[4,0]
|
|
assert_equal __, array[4,100]
|
|
assert_equal __, array[5,0]
|
|
end
|
|
|
|
def test_arrays_and_ranges
|
|
assert_equal __, (1..5).class
|
|
assert_not_equal [1,2,3,4,5], (1..5)
|
|
assert_equal __, (1..5).to_a
|
|
assert_equal __, (1...5).to_a
|
|
end
|
|
|
|
def test_slicing_with_ranges
|
|
array = [:peanut, :butter, :and, :jelly]
|
|
|
|
assert_equal __, array[0..2]
|
|
assert_equal __, array[0...2]
|
|
assert_equal __, array[2..-1]
|
|
end
|
|
|
|
def test_pushing_and_popping_arrays
|
|
array = [1,2]
|
|
array.push(:last)
|
|
|
|
assert_equal __, array
|
|
|
|
popped_value = array.pop
|
|
assert_equal __, popped_value
|
|
assert_equal __, array
|
|
end
|
|
|
|
def test_shifting_arrays
|
|
array = [1,2]
|
|
array.unshift(:first)
|
|
|
|
assert_equal __, array
|
|
|
|
shifted_value = array.shift
|
|
assert_equal __, shifted_value
|
|
assert_equal __, array
|
|
end
|
|
|
|
end
|