So you started using dependency injection because somebody told you it would make your tests simpler? But as you gaze at your deep hierarchy of test classes, "simple" is not exactly the word you think of. Plus, creating a new mock whenever you add a parameter to an injected constructor gets old very quickly.
You are not alone! And Jukito was created specifically for people like you. Read on, or get started right away!
If you use Google Guice, or if your GWT application uses Gin, then Jukito is the perfect antidote to your unit testing headaches. Now you can write tests like this:
@RunWith(JukitoRunner.class)
public class EmailSystemTest {
@Inject EmailSystemImpl emailSystem;
Email dummyEmail;
@Before
public void setupMocks(
IncomingEmails incomingEmails,
EmailFactory factory) {
dummyEmail = factory.createDummy();
when(incomingEmails.count()).thenReturn(1);
when(incomingEmails.get(0)).thenReturn(dummyEmail);
}
@Test
public void shouldFetchEmailWhenStarting(
EmailView emailView) {
// WHEN
emailSystem.start();
// THEN
verify(emailView).addEmail(dummyEmail);
}
}
That's right, Jukito lets you @Inject
fields exactly as if your test class was injected with Guice. You can also inject parameters into your @Test
, @Before
and @After
methods. Guice's just-in-time binding automatically instantiate your concrete classes, like EmailFactory
. What about interfaces like IncomingEmails
or EmailView
? Jukito mocks them out automatically for you using mockito!
Let's look at another example:
@RunWith(JukitoRunner.class)
public class CalculatorTest {
public static class Module extends JukitoModule {
protected void configureTest() {
bindMany(Calculator.class,
ScientificCalculator.class,
BusinessCalculator.class);
bindManyInstances(AdditionExample.class,
new AdditionExample(1, 1, 2),
new AdditionExample(10, 10, 20),
new AdditionExample(18, 24, 42));
}
}
@Test
public void testAdd(@All Calculator calculator, @All AdditionExample example) {
// WHEN
int result = calculator.add(example.a, example.b);
// THEN
assertEquals(example.expected, result);
}
}
As you see here, Jukito lets you define your very own test module, where you can bind classes just like a regular Guice module. It doesn't stop there, however. The bindMany
methods let you bind different classes or instances to the same interface. Combined with the powerful @All
annotation this lets you easily run a single test on a whole suite of test examples. The code above will run a total of six tests!
Read the wiki to find out everything Jukito has to offer, and join the discussion!
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。