"
" Version: 1.0.0
"

Before:
  unlet! input span expected

Execute (finds the largest product if span equals length):
  let input = "29"
  let span = 2
  let expected = 18
  AssertEqual expected, LargestProduct(input, span)

Execute (can find the largest product of 2 with numbers in order):
  let input = "0123456789"
  let span = 2
  let expected = 72
  AssertEqual expected, LargestProduct(input, span)

Execute (can find the largest product of 2):
  let input = "576802143"
  let span = 2
  let expected = 48
  AssertEqual expected, LargestProduct(input, span)

Execute (can find the largest product of 3 with numbers in order):
  let input = "0123456789"
  let span = 3
  let expected = 504
  AssertEqual expected, LargestProduct(input, span)

Execute (can find the largest product of 3):
  let input = "1027839564"
  let span = 3
  let expected = 270
  AssertEqual expected, LargestProduct(input, span)

Execute (can find the largest product of 5 with numbers in order):
  let input = "0123456789"
  let span = 5
  let expected = 15120
  AssertEqual expected, LargestProduct(input, span)

Execute (can get the largest product of a big number):
  let input = "73167176531330624919225119674426574742355349194934"
  let span = 6
  let expected = 23520
  AssertEqual expected, LargestProduct(input, span)

Execute (reports zero if the only digits are zero):
  let input = "0000"
  let span = 2
  let expected = 0
  AssertEqual expected, LargestProduct(input, span)

Execute (reports zero if all spans include zero):
  let input = "99099"
  let span = 3
  let expected = 0
  AssertEqual expected, LargestProduct(input, span)

Execute (rejects span longer than string length):
  let input = "123"
  let span = 4
  let expected = -1
  AssertEqual expected, LargestProduct(input, span)

Execute (reports 1 for empty string and empty product (0 span)):
  let input = ""
  let span = 0
  let expected = 1
  AssertEqual expected, LargestProduct(input, span)

Execute (reports 1 for nonempty string and empty product (0 span)):
  let input = "123"
  let span = 0
  let expected = 1
  AssertEqual expected, LargestProduct(input, span)

Execute (rejects empty string and nonzero span):
  let input = ""
  let span = 1
  let expected = -1
  AssertEqual expected, LargestProduct(input, span)

Execute (rejects invalid character in digits):
  AssertThrows call LargestProduct('1234a5', 2)
  AssertEqual 'invalid input', g:vader_exception

Execute (rejects negative span):
  let input = "12345"
  let span = -1
  let expected = -1
  AssertEqual expected, LargestProduct(input, span)