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[[test]]
name = "100"
regex = "|b"
haystack = "abc"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "110"
regex = "b|"
haystack = "abc"
matches = [[0, 0], [1, 2], [3, 3]]
[[test]]
name = "120"
regex = "|z"
haystack = "abc"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "130"
regex = "z|"
haystack = "abc"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "200"
regex = "|"
haystack = "abc"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "210"
regex = "||"
haystack = "abc"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "220"
regex = "||b"
haystack = "abc"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "230"
regex = "b||"
haystack = "abc"
matches = [[0, 0], [1, 2], [3, 3]]
[[test]]
name = "240"
regex = "||z"
haystack = "abc"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "300"
regex = "(?:)|b"
haystack = "abc"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "310"
regex = "b|(?:)"
haystack = "abc"
matches = [[0, 0], [1, 2], [3, 3]]
[[test]]
name = "320"
regex = "(?:|)"
haystack = "abc"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "330"
regex = "(?:|)|z"
haystack = "abc"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "400"
regex = "a(?:)|b"
haystack = "abc"
matches = [[0, 1], [1, 2]]
[[test]]
name = "500"
regex = ""
haystack = ""
matches = [[0, 0]]
[[test]]
name = "510"
regex = ""
haystack = "a"
matches = [[0, 0], [1, 1]]
[[test]]
name = "520"
regex = ""
haystack = "abc"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "600"
regex = '(?:|a)*'
haystack = "aaa"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
[[test]]
name = "610"
regex = '(?:|a)+'
haystack = "aaa"
matches = [[0, 0], [1, 1], [2, 2], [3, 3]]