node_modules/minimist/test/unknown.js

var parse = require('../');
var test = require('tape');

test('boolean and alias is not unknown', function (t) {
    var unknown = [];
    function unknownFn(arg) {
        unknown.push(arg);
        return false;
    }
    var aliased = [ '-h', 'true', '--derp', 'true' ];
    var regular = [ '--herp',  'true', '-d', 'true' ];
    var opts = {
        alias: { h: 'herp' },
        boolean: 'h',
        unknown: unknownFn
    };
    var aliasedArgv = parse(aliased, opts);
    var propertyArgv = parse(regular, opts);

    t.same(unknown, ['--derp', '-d']);
    t.end();
});

test('flag boolean true any double hyphen argument is not unknown', function (t) {
    var unknown = [];
    function unknownFn(arg) {
        unknown.push(arg);
        return false;
    }
    var argv = parse(['--honk', '--tacos=good', 'cow', '-p', '55'], {
        boolean: true,
        unknown: unknownFn
    });
    t.same(unknown, ['--tacos=good', 'cow', '-p']);
    t.same(argv, {
        honk: true,
        _: []
    });
    t.end();
});

test('string and alias is not unknown', function (t) {
    var unknown = [];
    function unknownFn(arg) {
        unknown.push(arg);
        return false;
    }
    var aliased = [ '-h', 'hello', '--derp', 'goodbye' ];
    var regular = [ '--herp',  'hello', '-d', 'moon' ];
    var opts = {
        alias: { h: 'herp' },
        string: 'h',
        unknown: unknownFn
    };
    var aliasedArgv = parse(aliased, opts);
    var propertyArgv = parse(regular, opts);

    t.same(unknown, ['--derp', '-d']);
    t.end();
});

test('default and alias is not unknown', function (t) {
    var unknown = [];
    function unknownFn(arg) {
        unknown.push(arg);
        return false;
    }
    var aliased = [ '-h', 'hello' ];
    var regular = [ '--herp',  'hello' ];
    var opts = {
        default: { 'h': 'bar' },
        alias: { 'h': 'herp' },
        unknown: unknownFn
    };
    var aliasedArgv = parse(aliased, opts);
    var propertyArgv = parse(regular, opts);

    t.same(unknown, []);
    t.end();
    unknownFn(); // exercise fn for 100% coverage
});

test('value following -- is not unknown', function (t) {
    var unknown = [];
    function unknownFn(arg) {
        unknown.push(arg);
        return false;
    }
    var aliased = [ '--bad', '--', 'good', 'arg' ];
    var opts = {
        '--': true,
        unknown: unknownFn
    };
    var argv = parse(aliased, opts);

    t.same(unknown, ['--bad']);
    t.same(argv, {
        '--': ['good', 'arg'],
        '_': []
    })
    t.end();
});