// Copyright (c) 2014, 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.

library code_transformers.test.assets_test;

import 'dart:async';

import 'package:barback/barback.dart';
import 'package:code_transformers/assets.dart';
import 'package:code_transformers/tests.dart';
import 'package:unittest/compact_vm_config.dart';
import 'package:unittest/unittest.dart';

main() {
  useCompactVMConfiguration();


  void testAssetUri(String name,
      {AssetId source, String uri, AssetId result, String message,
      bool errorOnAbsolute: true}) {
    test(name, () {
      var transformer = new Validator((transform) {
      var assetId = uriToAssetId(source, uri, transform.logger, null,
          errorOnAbsolute: errorOnAbsolute);
        expect(assetId, result);
      });
      var messages = [];
      if (message != null) messages.add(message);

      return applyTransformers(
            [[transformer]],
            inputs: {
              source.toString(): ''
            },
            messages: messages);
    });
  }

  group('uriToAssetId', () {
    testAssetUri('resolves relative URIs',
        source: new AssetId('a', 'web/main.dart'),
        uri: 'foo.dart',
        result: new AssetId('a', 'web/foo.dart'));

    testAssetUri('resolves package: URIs',
        source: new AssetId('a', 'web/main.dart'),
        uri: 'package:foo/foo.dart',
        result: new AssetId('foo', 'lib/foo.dart'));

    testAssetUri('resolves package: URIs from libs',
        source: new AssetId('a', 'lib/main.dart'),
        uri: 'package:foo/foo.dart',
        result: new AssetId('foo', 'lib/foo.dart'));

    testAssetUri('resolves packages paths',
        source: new AssetId('a', 'web/main.dart'),
        uri: 'packages/foo/foo.dart',
        result: new AssetId('foo', 'lib/foo.dart'));

    testAssetUri('resolves relative packages paths',
        source: new AssetId('a', 'web/main.dart'),
        uri: 'packages/foo/foo.dart',
        result: new AssetId('foo', 'lib/foo.dart'));

    testAssetUri('does not allow packages from non-dart lib files',
        source: new AssetId('a', 'lib/index.html'),
        uri: 'packages/foo/bar',
        message: 'warning: Invalid URL to reach to another package: '
            'packages/foo/bar. Path reaching to other packages must first '
            'reach up all the way to the packages directory. For example, try '
            'changing the URL to: ../../packages/foo/bar');

    testAssetUri('allows relative packages from non-dart lib files',
        source: new AssetId('a', 'lib/index.html'),
        uri: '../../packages/foo/bar',
        result: new AssetId('foo', 'lib/bar'));

    testAssetUri('does not allow package: imports from non-dart files',
        source: new AssetId('a', 'lib/index.html'),
        uri: 'package:foo/bar.dart',
        message: 'warning: absolute paths not allowed: "package:foo/bar.dart"');

    testAssetUri('does not allow absolute /packages by default',
        source: new AssetId('a', 'lib/index.html'),
        uri: '/packages/foo/bar.dart',
        message:
            'warning: absolute paths not allowed: "/packages/foo/bar.dart"');

    testAssetUri('can suppress error on absolute /packages ',
        source: new AssetId('a', 'lib/index.html'),
        uri: '/packages/foo/bar.dart',
        errorOnAbsolute: false,
        result: null);
  });
}

class Validator extends Transformer {
  final Function validation;

  Validator(this.validation);

  Future apply(Transform transform) {
    return new Future.value(validation(transform));
  }
}