const valid = [
    ["1", [0, 1]],
    ["2", [0, 2]],
    ["3", [0, 3]],
    ["5", [0, 5]],
    [" 1 ", [0, 1]],
    [" 5 ", [0, 5]],
    ["+2n + 1", [2, 1]],
    ["-1", [0, -1]],
    ["-1n + 3", [-1, 3]],
    ["-1n+3", [-1, 3]],
    ["-n+2", [-1, 2]],
    ["-n+3", [-1, 3]],
    ["0n+3", [0, 3]],
    ["1n", [1, 0]],
    ["1n+0", [1, 0]],
    ["2n", [2, 0]],
    ["2n + 1", [2, 1]],
    ["2n+1", [2, 1]],
    ["3n", [3, 0]],
    ["3n+0", [3, 0]],
    ["3n+1", [3, 1]],
    ["3n+2", [3, 2]],
    ["3n+3", [3, 3]],
    ["3n-1", [3, -1]],
    ["3n-2", [3, -2]],
    ["3n-3", [3, -3]],
    ["even", [2, 0]],
    ["n", [1, 0]],
    ["n+2", [1, 2]],
    ["odd", [2, 1]],

    // Surprisingly, neither sizzle, qwery or nwmatcher cover these cases
    ["-4n+13", [-4, 13]],
    ["-2n + 12", [-2, 12]],
];

const invalid = [
    "-",
    "- 1n",
    "-1 n",
    "2+0",
    "2n+-0",
    "an+b",
    "asdf",
    "b",
    "expr",
    "odd|even|x",
];

module.exports = {valid, invalid};