platform/packages/inflection3/test/singular_test.dart

library inflection3.singular.test;

import 'package:inflection3/inflection3.dart';
import 'package:inflection3/src/uncountable_nouns.dart';
import 'package:test/test.dart';

void main() {
  group('The SingularEncoder', () {
    test('converts nouns from plural to singular', () {
      expect(SINGULAR.convert(''), equals(''));
      expect(SINGULAR.convert('Houses'), equals('House'));
      expect(SINGULAR.convert('houses'), equals('house'));
      expect(SINGULAR.convert('ultimata'), equals('ultimatum'));
      expect(SINGULAR.convert('pentia'), equals('pentium'));
      expect(SINGULAR.convert('analyses'), equals('analysis'));
      expect(SINGULAR.convert('diagnoses'), equals('diagnosis'));
      expect(SINGULAR.convert('Parentheses'), equals('Parenthesis'));
      expect(SINGULAR.convert('lives'), equals('life'));
      expect(SINGULAR.convert('hives'), equals('hive'));
      expect(SINGULAR.convert('tives'), equals('tive'));
      expect(SINGULAR.convert('shelves'), equals('shelf'));
      expect(SINGULAR.convert('qualities'), equals('quality'));
      expect(SINGULAR.convert('series'), equals('series'));
      expect(SINGULAR.convert('movies'), equals('movie'));
      expect(SINGULAR.convert('benches'), equals('bench'));
      expect(SINGULAR.convert('fishes'), equals('fish'));
      expect(SINGULAR.convert('mice'), equals('mouse'));
      expect(SINGULAR.convert('lice'), equals('louse'));
      expect(SINGULAR.convert('buses'), equals('bus'));
      expect(SINGULAR.convert('shoes'), equals('shoe'));
      expect(SINGULAR.convert('testis'), equals('testis'));
      expect(SINGULAR.convert('crisis'), equals('crisis'));
      expect(SINGULAR.convert('axes'), equals('axis'));
      expect(SINGULAR.convert('axis'), equals('axis'));
      expect(SINGULAR.convert('viri'), equals('virus'));
      expect(SINGULAR.convert('octopi'), equals('octopus'));
      expect(SINGULAR.convert('aliases'), equals('alias'));
      expect(SINGULAR.convert('statuses'), equals('status'));
      expect(SINGULAR.convert('vertices'), equals('vertex'));
      expect(SINGULAR.convert('indices'), equals('index'));
      expect(SINGULAR.convert('Matrices'), equals('Matrix'));
      expect(SINGULAR.convert('quizzes'), equals('quiz'));
      expect(SINGULAR.convert('databases'), equals('database'));
    });

    test('handles uncountable nouns', () {
      uncountableNouns.forEach((noun) {
        expect(SINGULAR.convert(noun), equals(noun));
      });

      uncountableNouns.forEach((noun) {
        final upperNoun = noun.toUpperCase();
        expect(SINGULAR.convert(upperNoun), equals(upperNoun));
      });
    });

    test('handles irregular plural nouns', () {
      expect(SINGULAR.convert('people'), equals('person'));
      expect(SINGULAR.convert('Children'), equals('Child'));
      expect(SINGULAR.convert('child'), equals('child'));
      expect(SINGULAR.convert('men'), equals('man'));
    });
  });
}