102 lines
2.2 KiB
Ruby
102 lines
2.2 KiB
Ruby
require 'edgecase'
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class AboutArrays < EdgeCase::Koan
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def test_creating_arrays
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empty_array = Array.new
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assert_equal Array, empty_array.class
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assert_equal __, empty_array.size
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end
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def test_array_literals
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array = Array.new
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assert_equal [], array
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array[0] = 1
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assert_equal [1], array
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array[1] = 2
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assert_equal [1, __], array
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array << 333
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assert_equal __, array
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end
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def test_accessing_array_elements
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array = [:peanut, :butter, :and, :jelly]
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assert_equal __, array[0]
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assert_equal __, array.first
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assert_equal __, array[3]
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assert_equal __, array.last
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assert_equal __, array[-1]
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assert_equal __, array[-3]
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end
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def test_slicing_arrays
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array = [:peanut, :butter, :and, :jelly]
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assert_equal __, array[0,1]
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assert_equal __, array[0,2]
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assert_equal __, array[2,2]
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assert_equal __, array[2,20]
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assert_equal __, array[4,0]
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assert_equal __, array[5,0]
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end
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def test_arrays_and_ranges
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assert_equal Range, (1..5).class
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assert_not_equal [1,2,3,4,5], (1..5)
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assert_equal [1,2,3,4,5], (1..5).to_a
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assert_equal __, (1...5).to_a
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end
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def test_slicing_with_ranges
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array = [:peanut, :butter, :and, :jelly]
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assert_equal __, array[0..2]
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assert_equal __, array[0...2]
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assert_equal __, array[2..-1]
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end
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def test_pushing_and_popping_arrays
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array = [1,2]
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array.push(:last)
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assert_equal __, array
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popped_value = array.pop
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assert_equal __, popped_value
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assert_equal __, array
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end
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def test_shifting_arrays
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array = [1,2]
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array.unshift(:first)
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assert_equal __, array
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shifted_value = array.shift
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assert_equal __, shifted_value
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assert_equal __, array
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end
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def test_parallel_assignments
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first_name, last_name = ["John", "Smith"]
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assert_equal __, first_name
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assert_equal __, last_name
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end
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def test_parallel_assignments_with_extra_values
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first_name, last_name = ["John", "Smith", "III"]
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assert_equal __, first_name
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assert_equal __, last_name
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end
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def test_parallel_assignments_with_extra_variables
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first_name, last_name = ["Cher"]
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assert_equal __, first_name
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assert_equal __, last_name
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end
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end
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