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require 'test_helper'
class IndexTest < GSL::TestCase
# helper(s)
def _create_index array
i = GSL::Index.alloc(array.size)
array.each_with_index { |e, j| i[j] = e }
i
end
# tests
def test_get_int
i = GSL::Index.alloc(5)
assert_equal 2, i.get(2)
assert_equal 4, i.get(4)
assert_equal 3, i.get(-2)
assert_equal 0, i.get(-5)
end
def test_get_array
i = GSL::Index.alloc(5)
assert_equal _create_index([2, 3]), i.get([2, 3])
assert_equal _create_index([4, 2]), i.get([-1, 2])
assert_equal _create_index([4, 3, 1]), i.get([4, -2, 1])
assert_equal _create_index([0, 4, 4, 0]), i.get([0, 4, -1, -5])
end
def test_get_range
i = GSL::Index.alloc(5)
assert_equal _create_index([2, 3]), i.get(2..3)
assert_equal _create_index([0, 1, 2, 3, 4]), i.get(0..4)
assert_equal _create_index([0, 1, 2, 3, 4]), i.get(0..5)
assert_equal _create_index([0, 1, 2, 3, 4]), i.get(-5..-1)
assert_equal _create_index([0]), i.get(0..-5)
assert_equal _create_index([0]), i.get(-5..0)
assert_equal _create_index([3]), i.get(-2..3)
assert_equal _create_index([3, 4]), i.get(-2..4)
assert_equal _create_index([1, 2, 3]), i.get(-4...-1) # note the exclusive range operator!
end
def test_get_failure
i = GSL::Index.alloc(5)
assert_raises(RangeError) { i.get(5) }
assert_raises(RangeError) { i.get(-6) }
assert_raises(RangeError) { i.get(1_000_000) }
assert_raises(ArgumentError) { i.get(10**100) }
assert_raises(RangeError) { i.get([5]) }
assert_raises(RangeError) { i.get([-6]) }
assert_raises(RangeError) { i.get([-6, 0, 5]) }
assert_raises(RangeError) { i.get(-6..-1) }
assert_raises(RangeError) { i.get(3..-5) }
assert_raises(RangeError) { i.get(-2..-3) }
assert_raises(RangeError) { i.get(-2..1) }
end
end
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