I want to test that one of my ES6 modules calls another ES6 module in a particular way. With Jasmine this is super easy — The application code: // myModule.js import dependency from ‘./dependency’; export default (x) => { dependency.doSomething(x * 2); } And the test code: //myModule-test.js import myModule from ‘../myModule’; import dependency from … Read more
Is there a way to have a stubbed method return different objects on subsequent invocations? I’d like to do this to test nondeterminate responses from an ExecutorCompletionService. i.e. to test that irrespective of the return order of the methods, the outcome remains constant. The code I’m looking to test looks something like this. // Create … Read more
I’ve written a factory to produce java.sql.Connection objects: public class MySQLDatabaseConnectionFactory implements DatabaseConnectionFactory { @Override public Connection getConnection() { try { return DriverManager.getConnection(…); } catch (SQLException e) { throw new RuntimeException(e); } } } I’d like to validate the parameters passed to DriverManager.getConnection, but I don’t know how to mock a static method. I’m using … Read more
I have a method on an interface: string DoSomething(string whatever); I want to mock this with MOQ, so that it returns whatever was passed in – something like: _mock.Setup( theObject => theObject.DoSomething( It.IsAny<string>( ) ) ) .Returns( [the parameter that was passed] ) ; Any ideas? 3 s 3
I have a method with a void return type. It can also throw a number of exceptions so I’d like to test those exceptions being thrown. All attempts have failed with the same reason: The method when(T) in the type Stubber is not applicable for the arguments (void) Any ideas how I can get the … Read more
Is there any way, using Mockito, to mock some methods in a class, but not others? For example, in this (admittedly contrived) Stock class I want to mock the getPrice() and getQuantity() return values (as shown in the test snippet below) but I want the getValue() to perform the multiplication as coded in the Stock … Read more
I have a method that gets called twice, and I want to capture the argument of the second method call. Here’s what I’ve tried: ArgumentCaptor<Foo> firstFooCaptor = ArgumentCaptor.forClass(Foo.class); ArgumentCaptor<Foo> secondFooCaptor = ArgumentCaptor.forClass(Foo.class); verify(mockBar).doSomething(firstFooCaptor.capture()); verify(mockBar).doSomething(secondFooCaptor.capture()); // then do some assertions on secondFooCaptor.getValue() But I get a TooManyActualInvocations Exception, as Mockito thinks that doSomething should only be … Read more
What is the difference between @Mock and @InjectMocks in Mockito framework? 12 s 12 @Mock creates a mock. @InjectMocks creates an instance of the class and injects the mocks that are created with the @Mock (or @Spy) annotations into this instance. Note you must use @RunWith(MockitoJUnitRunner.class) or Mockito.initMocks(this) to initialize these mocks and inject them … Read more
What is Mocking? . 8 s 8 Prologue: If you look up the noun mock in the dictionary you will find that one of the definitions of the word is something made as an imitation. Mocking is primarily used in unit testing. An object under test may have dependencies on other (complex) objects. To isolate the … Read more
I know how I use these terms, but I’m wondering if there are accepted definitions for faking, mocking, and stubbing for unit tests? How do you define these for your tests? Describe situations where you might use each. Here is how I use them: Fake: a class that implements an interface but contains fixed data … Read more
