protoc_plugin/test/const_generator_test.dart

#!/usr/bin/env dart
// Copyright (c) 2015, 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.

import 'package:protoc_plugin/const_generator.dart';
import 'package:protoc_plugin/indenting_writer.dart';
import 'package:test/test.dart';

String toConst(val) {
  var out = IndentingWriter();
  writeJsonConst(out, val);
  return out.toString();
}

void main() {
  test('writeJsonConst examples', () {
    expect(toConst(null), 'null');
    expect(toConst(true), 'true');
    expect(toConst(false), 'false');
    expect(toConst(123), '123');
    expect(toConst(123.456), '123.456');
  });

  test('writeJsonConst string examples', () {
    expect(toConst(''), "''");
    expect(toConst('hello'), "'hello'");
    expect(toConst(r'backslash: \'), r"'backslash: \\'");
    expect(toConst(r'hello $world'), r"'hello \$world'");
    expect(toConst("She said, 'hello.'"), r"'She said, \'hello.\''");
    expect(toConst('single: \' double: "'), r"""'single: \' double: "'""");
    expect(toConst("""single: ' double: '' triple: '''"""),
        r"'single: \' double: \'\' triple: \'\'\''");
    expect(toConst("""single: ' double: " triples: ''' and \"\"\"!"""),
        r"""'single: \' double: " triples: \'\'\' and """ '"""!\'');
  });

  test('writeJsonConst list examples', () {
    expect(toConst([]), 'const []');
    expect(toConst([1, 2, 3]), 'const [1, 2, 3]');
    expect(
        toConst([
          [1, 2],
          [3, 4]
        ]),
        'const [\n'
        '  const [1, 2],\n'
        '  const [3, 4],\n'
        ']');
  });

  test('writeJsonConst map examples', () {
    expect(toConst({}), 'const {}');
    expect(toConst({'a': 1, 'b': 2}), "const {'a': 1, 'b': 2}");
    expect(
        toConst({
          'a': {'x': 1},
          'b': {'x': 2}
        }),
        'const {\n'
        "  'a': const {'x': 1},\n"
        "  'b': const {'x': 2},\n"
        '}');
  });
}