halkyon/halkyon_learn_flutter/test/feature/kanji/model/radical_test.dart

import 'package:flutter_test/flutter_test.dart';
import 'package:halkyon_learn_flutter/src/feature/kanji/model/radical.dart';

void main() {
  test('the 214 Kangxi radicals in their order, by their strokes from 1 '
      'to 17', () {
    expect(
      [for (final radical in radicals) radical.number],
      [
        for (var number = 1; number <= 214; number++) number,
      ],
    );
    final strokes = [for (final radical in radicals) radical.strokes];
    expect(strokes, orderedEquals([...strokes]..sort()));
    expect((strokes.first, strokes.last), (1, 17));
    // Const, as the table is: a record compares its lists by identity.
    expect(radicals[84], const (
      number: 85,
      character: '水',
      variants: ['氵'],
      strokes: 4,
      name: 'water',
    ));
  });

  test('each is one character, as is every form it takes in kanji', () {
    for (final radical in radicals) {
      for (final form in [radical.character, ...radical.variants]) {
        expect(form.runes, hasLength(1), reason: '${radical.number}');
      }
    }
  });

  test("a radical's label is the dictionary's", () {
    expect(radicalLabel(85), 'radical:85');
  });

  test('the forms a radical takes in each language: simplified Chinese its '
      "own, traditional Chinese and Korean without Japanese's own", () {
    final speech = radicals[148];
    final dragon = radicals[211];
    final food = radicals[183];
    expect(radicalFormsIn(speech, 'zh-Hans'), ['讠']);
    expect(radicalFormsIn(speech, 'zh-Hant'), isEmpty);
    expect(radicalFormsIn(dragon, 'ja'), ['竜']);
    expect(radicalFormsIn(dragon, 'zh'), ['龙']);
    expect(radicalFormsIn(dragon, 'ko'), isEmpty);
    // Simplified Chinese writes 食 as 饣 at a character's side, not 飠.
    expect(radicalFormsIn(food, 'zh-CN'), ['饣']);
    expect(radicalFormsIn(food, 'zh-TW'), ['飠']);
    expect(radicalsIn('zh-Hans')[148].variants, ['讠']);
    expect((hasRadicals('ko'), hasRadicals('el')), (true, false));
  });
}