52 lines
1.5 KiB
Ruby
52 lines
1.5 KiB
Ruby
require File.expand_path(File.dirname(__FILE__) + '/neo')
|
|
|
|
class AboutArrayAssignment < Neo::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
|