how to setup a unittest for a web-project - unit-testing

Question

I have problems to properly configure my first unittest in the DartEditor(1.8.5).
I wrote a web-app with Dart that is located in the web-folder.
Now i added a test-folder parallel to web with a file called test.dart:
library dartingflame_test;
import 'dart:math';
import 'package:unittest/unittest.dart';
import 'package:unittest/html_config.dart';
import 'package:mockito/mockito.dart';
import '../web/dartingflame.dart';
void main() {
useHtmlConfiguration();
test("verify robot's direction after move", verifyRobotDirectionAfterMove);
}
void verifyRobotDirectionAfterMove() {...}
Unfortunatly I now have problems to run this test file.
Run with Dartium leads to the message: Unable to locate associated html file
Run leads to: Observatory listening on http://127.0.0.1:49919
The built-in library 'dart:html' is not available on the stand-alone VM.
'package:unittest/html_config.dart': error: line 10 pos 1: library handler failed
import 'dart:html';
Using useVMConfiguration() instead of useHtmlConfiguration() doesn't help. The test execution still complaints about the import 'dart:html';-line in the library under test.
I couldn't find a solution in the "Unit Testing with Dart"-article.
UPDATE (incorporating Günter Zöchbauer's comment)
ok, i created the index.html which invokes test.dart, but now i seem to have a problem with the relative import of the lib under test import '../web/dartingflame.dart';:
Failed to load resource: the server responded with a status of 404 (Not Found)
http://localhost:8081/web/dartingflame.dart
An error occurred loading file: http://localhost:8081

Answer 1

You need to create a web page index.html with the test script as script tag an launch it like any Dart web app. You can also run it non-interactively using content_shell. The Dart SDK contains a batch script which downloads and installs content_shell (it is left out of the SDK download to keep a reasonable download size.
There is also a package test_runner available at http://pub.dartlang.org which helps running all tests in the test directory.