119 lines
4.1 KiB
TypeScript
119 lines
4.1 KiB
TypeScript
import assert from 'node:assert/strict';
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import test, { describe } from 'node:test';
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import { detect, encodingByDataCoding, encodings } from '../src/defs/encodings.ts';
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describe('ASCII (GSM 03.38)', () => {
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const samples: [string, number[]][] = [
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['@£$¥', [0, 1, 2, 3]],
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[' 1a=', [0x20, 0x31, 0x61, 0x3D]],
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['~^€', [0x1B, 0x3D, 0x1B, 0x14, 0x1B, 0x65]],
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];
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test('matches strings encodable in the GSM 03.38 charset', () => {
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assert.ok(encodings.ASCII.match(''));
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assert.ok(encodings.ASCII.match('@£$¥èéùìòÇ\nØø\rÅåΔ_ΦΓΛΩΠΨΣΘΞ\x1BÆæßÉ !"#¤%&\''));
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assert.ok(encodings.ASCII.match('()*+,-./0123456789:;<=>?¡ABCDEFGHIJKLMNOPQRSTUVWXYZ'));
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assert.ok(encodings.ASCII.match('ÄÖÑܧ¿abcdefghijklmnopqrstuvwxyzäöñüà'));
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assert.ok(encodings.ASCII.match('\f^{}\\[~]|€'));
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});
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test('rejects strings outside the GSM 03.38 charset', () => {
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assert.ok(!encodings.ASCII.match('`'));
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assert.ok(!encodings.ASCII.match('ÁáçÚUÓO'));
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assert.ok(!encodings.ASCII.match('تست'));
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});
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test('round-trips the sample strings', () => {
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for (const [str, bytes] of samples) {
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assert.deepEqual(encodings.ASCII.encode(str), Buffer.from(bytes));
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assert.equal(encodings.ASCII.decode(Buffer.from(bytes)), str);
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}
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});
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});
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describe('LATIN1', () => {
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const samples: [string, number[]][] = [
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['@$`Á', [0x40, 0x24, 0x60, 0xC1]],
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['áçÚ', [0xE1, 0xE7, 0xDA]],
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['UÓO', [0x55, 0xD3, 0x4F]],
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];
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test('never matches, so it is never auto-selected for new messages', () => {
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assert.ok(!encodings.LATIN1.match('`ÁáçÚUÓO'));
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assert.ok(!encodings.LATIN1.match('تست'));
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assert.ok(!encodings.LATIN1.match('۱۲۳۴۵۶۷۸۹۰'));
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});
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test('round-trips the sample strings', () => {
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for (const [str, bytes] of samples) {
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assert.deepEqual(encodings.LATIN1.encode(str), Buffer.from(bytes));
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assert.equal(encodings.LATIN1.decode(Buffer.from(bytes)), str);
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}
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});
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});
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describe('UCS2', () => {
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const samples: [string, number[]][] = [
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[' 1a', [0x00, 0x20, 0x00, 0x31, 0x00, 0x61]],
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['۱۲۳', [0x06, 0xF1, 0x06, 0xF2, 0x06, 0xF3]],
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];
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test('always matches', () => {
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assert.ok(encodings.UCS2.match(''));
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assert.ok(encodings.UCS2.match('`ÁáçÚUÓO'));
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assert.ok(encodings.UCS2.match('تست'));
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});
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test('round-trips the sample strings', () => {
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for (const [str, bytes] of samples) {
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assert.deepEqual(encodings.UCS2.encode(str), Buffer.from(bytes));
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assert.equal(encodings.UCS2.decode(Buffer.from(bytes)), str);
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}
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});
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test('decoding does not mutate the caller\'s buffer', () => {
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const buffer = Buffer.from([0x00, 0x20]);
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encodings.UCS2.decode(buffer);
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assert.deepEqual(buffer, Buffer.from([0x00, 0x20]));
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});
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});
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describe('detect()', () => {
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test('picks the narrowest encoding that fits the string', () => {
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assert.equal(detect(''), 'ASCII');
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assert.equal(detect('ÄÖÑܧ¿abcdefghijklmnopqrstuvwxyzäöñüà(){}[]'), 'ASCII');
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assert.equal(detect('`ÁáçÚUÓO'), 'UCS2');
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assert.equal(detect('«©®µ¶±»'), 'UCS2');
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assert.equal(detect('ʹʺʻʼʽ`'), 'UCS2');
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assert.equal(detect('تست'), 'UCS2');
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assert.equal(detect('۱۲۳۴۵۶۷۸۹۰'), 'UCS2');
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});
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});
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describe('encodingByDataCoding()', () => {
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test('resolves the flat SMPP data_coding table', () => {
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assert.equal(encodingByDataCoding(0x00), 'ASCII');
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assert.equal(encodingByDataCoding(0x01), 'ASCII');
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assert.equal(encodingByDataCoding(0x08), 'UCS2');
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});
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// 0.4.0 resolved 0x03 to the alias ISO_8859_1, which has no decoder, and silently fell back to
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// ASCII — every Latin-1 message came out corrupted.
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test('resolves 0x03 to LATIN1 rather than falling back to ASCII', () => {
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assert.equal(encodingByDataCoding(0x03), 'LATIN1');
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});
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test('reads the alphabet bits when a message class is present', () => {
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assert.equal(encodingByDataCoding(0x10), 'ASCII');
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assert.equal(encodingByDataCoding(0x18), 'UCS2');
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assert.equal(encodingByDataCoding(0xF0), 'ASCII');
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});
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test('falls back to ASCII for alphabets it has no codec for', () => {
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assert.equal(encodingByDataCoding(0x05), 'ASCII');
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assert.equal(encodingByDataCoding(0x0E), 'ASCII');
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});
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});
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