@mjackson/headers/src/lib/content-type.test.ts

A toolkit for working with HTTP headers in JavaScript

import * as assert from 'node:assert/strict';
import { describe, it } from 'node:test';

import { ContentType } from './content-type.ts';

describe('ContentType', () => {
  it('initializes with an empty string', () => {
    let header = new ContentType('');
    assert.equal(header.mediaType, undefined);
    assert.equal(header.charset, undefined);
  });

  it('initializes with a string', () => {
    let header = new ContentType('text/plain; charset=utf-8');
    assert.equal(header.mediaType, 'text/plain');
    assert.equal(header.charset, 'utf-8');
  });

  it('initializes with an object', () => {
    let header = new ContentType({ mediaType: 'text/plain', charset: 'utf-8' });
    assert.equal(header.mediaType, 'text/plain');
    assert.equal(header.charset, 'utf-8');
  });

  it('initializes with another ContentType', () => {
    let header = new ContentType(new ContentType('text/plain; charset=utf-8'));
    assert.equal(header.mediaType, 'text/plain');
    assert.equal(header.charset, 'utf-8');
  });

  it('handles whitespace in initial value', () => {
    let header = new ContentType(' text/html ;  charset = iso-8859-1 ');
    assert.equal(header.mediaType, 'text/html');
    assert.equal(header.charset, 'iso-8859-1');
  });

  it('sets and gets media type', () => {
    let header = new ContentType('text/plain');
    header.mediaType = 'application/json';
    assert.equal(header.mediaType, 'application/json');
  });

  it('sets and gets charset', () => {
    let header = new ContentType('text/plain');
    header.charset = 'utf-8';
    assert.equal(header.charset, 'utf-8');
  });

  it('sets and gets boundary', () => {
    let header = new ContentType('multipart/form-data');
    header.boundary = 'abc123';
    assert.equal(header.boundary, 'abc123');
  });

  it('handles quoted attribute values', () => {
    let header = new ContentType('text/plain; charset="us-ascii"');
    assert.equal(header.charset, 'us-ascii');
  });

  it('converts to string correctly', () => {
    let header = new ContentType('text/plain; charset=utf-8');
    assert.equal(header.toString(), 'text/plain; charset=utf-8');
  });

  it('converts to an empty string when media type is not set', () => {
    let header = new ContentType();
    header.charset = 'utf-8';
    assert.equal(header.toString(), '');
  });

  it('handles multiple attributes', () => {
    let header = new ContentType('multipart/form-data; boundary="abc123"; charset=utf-8');
    assert.equal(header.mediaType, 'multipart/form-data');
    assert.equal(header.boundary, 'abc123');
    assert.equal(header.charset, 'utf-8');
  });

  it('preserves case for media type', () => {
    let header = new ContentType('Text/HTML');
    assert.equal(header.mediaType, 'Text/HTML');
  });

  it('handles attribute values with special characters', () => {
    let header = new ContentType('multipart/form-data; boundary="---=_Part_0_1234567.89"');
    assert.equal(header.boundary, '---=_Part_0_1234567.89');
  });

  it('correctly quotes attribute values in toString()', () => {
    let header = new ContentType('multipart/form-data');
    header.boundary = 'abc 123';
    assert.equal(header.toString(), 'multipart/form-data; boundary="abc 123"');
  });

  it('handles empty attribute values', () => {
    let header = new ContentType('text/plain; charset=');
    assert.equal(header.charset, '');
  });

  it('ignores attributes without values', () => {
    let header = new ContentType('text/plain; charset');
    assert.equal(header.charset, undefined);
  });

  it('preserves order of attributes in toString()', () => {
    let header = new ContentType('multipart/form-data; charset=utf-8; boundary=abc123');
    assert.equal(header.toString(), 'multipart/form-data; charset=utf-8; boundary=abc123');
  });
});