Talk given at Google Developer Group NYC in February 2014 on Dart unit testing.

1. Dart Unit Testing
Matt Norris
@MattNorrisMe

2. What will we cover?
Client tests
Server tests

3. Why test?

4. I must have put a decimal point in the wrong place.
I always mess up some mundane detail!

6. Client tests

7. HTML unit test
test_index.dart
import 'package:unittest/unittest.dart';
import 'package:unittest/html_enhanced_config.dart';
...
main() {
useHtmlEnhancedConfiguration();
test("url includes scheme", () {
expect(isValidUrl(“www.dartlang.org”), false);
expect(isValidUrl(“http://www.dartlang.org”), true);
});

8. HTML unit test
test_index.dart
import 'package:unittest/unittest.dart';
import 'package:unittest/html_enhanced_config.dart';
...
main() {
useHtmlEnhancedConfiguration();
test("url includes scheme", () {
expect(isValidUrl(“www.dartlang.org”), false);
expect(isValidUrl(“http://www.dartlang.org”), true);
});

9. HTML unit test
test_index.dart
import 'package:unittest/unittest.dart';
import 'package:unittest/html_enhanced_config.dart';
...
main() {
useHtmlEnhancedConfiguration();
test("url includes scheme", () {
expect(isValidUrl(“www.dartlang.org”), false);
expect(isValidUrl(“http://www.dartlang.org”), true);
});

10. HTML unit test

12. Headless HTML unit test
$ content_shell --dump-render-tree web/test_index.html
Content-Type: text/plain
PASS
All 2 tests passed
Collapse All

13. Server

14. server.dart
void main() {
...
app.post("/").listen((request) {
String url = request.param('url');
String hash = toHash(url);
client.set(hash, url).then((_)=>request.response.json(hash););
});
...

15. Server tests

16. server_tests.dart
import 'package:unittest/unittest.dart';
import 'package:unittest/vm_config.dart';
import 'server.dart' as server;
void main() {
useVMConfiguration();
String URL = 'http://www.meetup.com/gdg-silicon-valley’;
test('HashURL', () {
expect(server.toHash(URL), isNotNull);
expect(server.toHash(URL), '287b6d95');
...

17. server_tests.dart
import 'package:unittest/unittest.dart';
import 'package:unittest/vm_config.dart';
import 'server.dart' as server;
void main() {
useVMConfiguration();
String URL = 'http://www.meetup.com/gdg-silicon-valley’;
test('HashURL', () {
expect(server.toHash(URL), isNotNull);
expect(server.toHash(URL), '287b6d95');
...

18. server_tests.dart
import 'package:unittest/unittest.dart';
import 'package:unittest/vm_config.dart';
import 'server.dart' as server;
void main() {
useVMConfiguration();
String URL = 'http://www.meetup.com/gdg-silicon-valley’;
test('HashURL', () {
expect(server.toHash(URL), isNotNull);
expect(server.toHash(URL), '287b6d95');
...

19. VM unit tests
$ dart server_tests.dart
PASS: HashURL

20. What did we cover?
Client tests
Server tests

21. What should you do?
Try Dart
Test things
Deploy!

22. Such reference... much testing
Project
github.com/mattnorris/dart-url-shortener
Original talk
youtu.be/22pE1IP-yoY
Continuous Integration in the Cloud
drone.io

23. Thank you!
Questions?