52 lines
1.4 KiB
Ruby
52 lines
1.4 KiB
Ruby
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require File.expand_path(File.dirname(__FILE__) + '/neo')
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class AboutArrayAssignment < Neo::Koan
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def test_non_parallel_assignment
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names = ["John", "Smith"]
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assert_equal ["John", "Smith"], names
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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 "John", first_name
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assert_equal "Smith", 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 "John", first_name
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assert_equal "Smith", last_name # weird, should've errored?
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end
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def test_parallel_assignments_with_splat_operator
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first_name, *last_name = ["John", "Smith", "III"]
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assert_equal "John", first_name
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assert_equal ["Smith", "III"], last_name
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end
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def test_parallel_assignments_with_too_few_values
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first_name, last_name = ["Cher"]
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assert_equal "Cher", first_name
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assert_equal nil, last_name
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end
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def test_parallel_assignments_with_subarrays
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first_name, last_name = [["Willie", "Rae"], "Johnson"]
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assert_equal ["Willie", "Rae"], first_name
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assert_equal "Johnson", last_name
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end
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def test_parallel_assignment_with_one_variable
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first_name, = ["John", "Smith"]
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assert_equal "John", first_name
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end
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def test_swapping_with_parallel_assignment
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first_name = "Roy"
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last_name = "Rob"
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first_name, last_name = last_name, first_name
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assert_equal "Rob", first_name
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assert_equal "Roy", last_name
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end
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end
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