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require File.expand_path(File.dirname(__FILE__) + '/edgecase')
class AboutArrayAssignment < EdgeCase::Koan
def test_non_parallel_assignment
names = ["John", "Smith"]
assert_equal __(["John", "Smith"]), names
end
def test_parallel_assignments
first_name, last_name = ["John", "Smith"]
assert_equal __("John"), first_name
assert_equal __("Smith"), last_name
end
def test_parallel_assignments_with_extra_values
first_name, last_name = ["John", "Smith", "III"]
assert_equal __("John"), first_name
assert_equal __("Smith"), last_name
end
def test_parallel_assignments_with_splat_operator
first_name, *last_name = ["John", "Smith", "III"]
assert_equal __("John"), first_name
assert_equal __(["Smith","III"]), last_name
end
def test_parallel_assignments_with_too_few_variables
first_name, last_name = ["Cher"]
assert_equal __("Cher"), first_name
assert_equal __(nil), last_name
end
def test_parallel_assignments_with_subarrays
first_name, last_name = [["Willie", "Rae"], "Johnson"]
assert_equal __(["Willie", "Rae"]), first_name
assert_equal __("Johnson"), last_name
end
def test_parallel_assignment_with_one_variable
first_name, = ["John", "Smith"]
assert_equal __("John"), first_name
end
def test_swapping_with_parallel_assignment
first_name = "Roy"
last_name = "Rob"
first_name, last_name = last_name, first_name
assert_equal __('Rob'), first_name
assert_equal __('Roy'), last_name
end
end
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