test.js

const assert = require('assert');
const { check_yaml } = require('./dist/check_yaml.js');
const { yaml_to_json_array } = require('./dist/yaml_to_json_array.js');
const { yaml_to_json_string } = require('./dist/yaml_to_json_string.js');
const { atob } = require('./src/base64.js');

function check_yaml_string(yaml) {
  const message = check_yaml(new TextEncoder("utf-8").encode(yaml));
  if (message) {
    return new TextDecoder("utf-8").decode(message);
  } else {
    return null;
  }
}

function yaml_to_json_binary(yaml) {
  return new TextDecoder("utf-8").decode(
    yaml_to_json_array(
      new TextEncoder("utf-8").encode(yaml)
    )
  );
}

// "árvíztűrő tükörfúrógép" stored as UTF-8, prints with multi-byte characters
assert.strictEqual(
  new TextDecoder("utf-8").decode(
    Uint8Array.from(
      atob('w6FydsOtenTFsXLFkSB0w7xrw7ZyZsO6csOzZ8OpcA=='),
      c => c.charCodeAt(0)
    )
  ),
  "árvíztűrő tükörfúrógép"
);

// a simple YAML string
assert.strictEqual(check_yaml_string('{foo: 1, bar: [2, 3], john: doe}'), null);
assert.strictEqual(yaml_to_json_string('{foo: 1, bar: [2, 3], john: doe}'), '{"foo": 1,"bar": [2,3],"john": "doe"}');

// an invalid YAML string
assert.notStrictEqual(check_yaml_string('{}{}'), null);
assert.strictEqual(yaml_to_json_string('{}{}'), null);

// a YAML string with wrong encoding
assert.notStrictEqual(check_yaml_string(String.raw`"árvíztűrő \x97 türökfúrógép"`), null);
assert.strictEqual(yaml_to_json_string(String.raw`"árvíztűrő \x97 türökfúrógép"`), null);

// a complex YAML string
const yaml = String.raw`
en: Planet (Gas)
fr: Planète (Gazeuse)
ru: Планета (Газ)
ja: 惑星（ガス）
zh: 行星（气体）
# UTF8 decoding only happens in double-quoted strings,
# as per the YAML standard
decode this: "\u263A \xE2\x98\xBA"
and this as well: "\u2705 \U0001D11E"
not decoded: '\u263A \xE2\x98\xBA'
neither this: '\u2705 \U0001D11E'
`;
const json = {
  "en": "Planet (Gas)",
  "fr": "Planète (Gazeuse)",
  "ru": "Планета (Газ)",
  "ja": "惑星（ガス）",
  "zh": "行星（气体）",
  "decode this": "☺ ☺",
  "and this as well": "✅ 𝄞",
  "not decoded": "\\u263A \\xE2\\x98\\xBA",
  "neither this": "\\u2705 \\U0001D11E"
};
assert.deepStrictEqual(JSON.parse(yaml_to_json_string(yaml)), json);
assert.deepStrictEqual(JSON.parse(yaml_to_json_binary(yaml)), json);

// a complex YAML string with the document start marker and non-specific tags (!ruby)
const y = `--- !ruby/hash:ActiveSupport::HashWithIndifferentAccess
id:
regrade_option: ''
points_possible: 1.0
correct_comments: ''
incorrect_comments: ''
neutral_comments: ''
correct_comments_html: ''
incorrect_comments_html: ''
neutral_comments_html: ''
question_type: multiple_choice_question
question_name: Question
name: Question
question_text: "<p>Inca used an innovative farming method to overcome difficulties
  presented by living in the mountains. This technique was called:</p>"
answers:
- !ruby/hash:ActiveSupport::HashWithIndifferentAccess
  id: 1000
  text: terraced agriculture
  html: ''
  comments: ''
  comments_html: ''
  weight: 100.0
- !ruby/hash:ActiveSupport::HashWithIndifferentAccess
  id: 2000
  text: slash & burn agriculture
  html: ''
  comments: ''
  comments_html: ''
  weight: 0.0
- !ruby/hash:ActiveSupport::HashWithIndifferentAccess
  id: 3000
  text: chinampas farming
  html: ''
  comments: ''
  comments_html: ''
  weight: 0.0
- !ruby/hash:ActiveSupport::HashWithIndifferentAccess
  id: 4000
  text: crop rotation
  html: ''
  comments: ''
  comments_html: ''
  weight: 0.0
text_after_answers: ''
assessment_question_id:
`;
const j = {
  "id": null,
  "regrade_option": "",
  "points_possible": 1.0,
  "correct_comments": "",
  "incorrect_comments": "",
  "neutral_comments": "",
  "correct_comments_html": "",
  "incorrect_comments_html": "",
  "neutral_comments_html": "",
  "question_type": "multiple_choice_question",
  "question_name": "Question",
  "name": "Question",
  "question_text": "<p>Inca used an innovative farming method to overcome difficulties presented by living in the mountains. This technique was called:</p>",
  "answers": [
    { "id": 1000, "text": "terraced agriculture", "html": "", "comments": "", "comments_html": "", "weight": 100.0 },
    { "id": 2000, "text": "slash & burn agriculture", "html": "", "comments": "", "comments_html": "", "weight": 0.0 },
    { "id": 3000, "text": "chinampas farming", "html": "", "comments": "", "comments_html": "", "weight": 0.0 },
    { "id": 4000, "text": "crop rotation", "html": "", "comments": "", "comments_html": "", "weight": 0.0 }
  ],
  "text_after_answers": "",
  "assessment_question_id": null
};
assert.deepStrictEqual(JSON.parse(yaml_to_json_string(y)), j);
assert.deepStrictEqual(JSON.parse(yaml_to_json_binary(y)), j);