pkg/polymer/test/utils_test.dart

// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/** Tests for some of the utility helper functions used by the compiler. */
library polymer.test.utils_test;

import 'package:unittest/compact_vm_config.dart';
import 'package:unittest/unittest.dart';
import 'package:polymer/src/utils.dart';

main() {
  useCompactVMConfiguration();

  for (bool startUppercase in [false, true]) {
    Matcher caseEquals(String str) {
      if (startUppercase) str = str[0].toUpperCase() + str.substring(1);
      return equals(str);
    }

    camelCase(str) => toCamelCase(str, startUppercase: startUppercase);

    group('toCamelCase startUppercase=$startUppercase', () {
      test('empty', () {
        expect(camelCase(''), equals(''));
      });

      test('single token', () {
        expect(camelCase('a'), caseEquals('a'));
        expect(camelCase('ab'), caseEquals('ab'));
        expect(camelCase('Ab'), caseEquals('Ab'));
        expect(camelCase('AB'), caseEquals('AB'));
        expect(camelCase('long_word'), caseEquals('long_word'));
      });

      test('dashes in the middle', () {
        expect(camelCase('a-b'), caseEquals('aB'));
        expect(camelCase('a-B'), caseEquals('aB'));
        expect(camelCase('A-b'), caseEquals('AB'));
        expect(camelCase('long-word'), caseEquals('longWord'));
      });

      test('leading/trailing dashes', () {
        expect(camelCase('-hi'), caseEquals('Hi'));
        expect(camelCase('hi-'), caseEquals('hi'));
        expect(camelCase('hi-friend-'), caseEquals('hiFriend'));
      });

      test('consecutive dashes', () {
        expect(camelCase('--hi-friend'), caseEquals('HiFriend'));
        expect(camelCase('hi--friend'), caseEquals('hiFriend'));
        expect(camelCase('hi-friend--'), caseEquals('hiFriend'));
      });
    });
  }

  group('toHyphenedName', () {
    test('empty', () {
      expect(toHyphenedName(''), '');
    });

    test('all lower case', () {
      expect(toHyphenedName('a'), 'a');
      expect(toHyphenedName('a-b'), 'a-b');
      expect(toHyphenedName('aBc'), 'a-bc');
      expect(toHyphenedName('abC'), 'ab-c');
      expect(toHyphenedName('abc-d'), 'abc-d');
      expect(toHyphenedName('long_word'), 'long_word');
    });

    test('capitalized letters in the middle/end', () {
      expect(toHyphenedName('aB'), 'a-b');
      expect(toHyphenedName('longWord'), 'long-word');
    });

    test('leading capital letters', () {
      expect(toHyphenedName('Hi'), 'hi');
      expect(toHyphenedName('Hi-'), 'hi-');
      expect(toHyphenedName('HiFriend'), 'hi-friend');
    });

    test('consecutive capital letters', () {
      expect(toHyphenedName('aBC'), 'a-b-c');
    });
  });
}