denoland-deno/flags/tests/all_bool.ts

import { test, assertEqual } from "https://deno.land/x/testing/testing.ts";
import parseArgs from "../index.ts";

// flag boolean true (default all --args to boolean)
test(function flagBooleanTrue() {
    const argv = parseArgs(['moo', '--honk', 'cow'], {
        boolean: true
    });
    
    assertEqual(argv, {
        honk: true,
        _: ['moo', 'cow']
    });
    
    assertEqual(typeof argv.honk, 'boolean');
});

// flag boolean true only affects double hyphen arguments without equals signs
test(function flagBooleanTrueOnlyAffectsDoubleDash() {
    var argv = parseArgs(['moo', '--honk', 'cow', '-p', '55', '--tacos=good'], {
        boolean: true
    });
    
    assertEqual(argv, {
        honk: true,
        tacos: 'good',
        p: 55,
        _: ['moo', 'cow']
    });
    
    assertEqual(typeof argv.honk, 'boolean');
});