Comments on: Mockito in six easy examples

By: Setya

Setya — Sat, 14 Nov 2009 16:28:09 +0000

Hi,

I have inherited method that calls super followed by my own implementation. I want to test this method by calling my own implementation without super call. Is it possible to do this with Mockito ?

Regards,

Setya

By: nico

nico — Sun, 25 Oct 2009 04:33:36 +0000

Thanks for the post!

I tried the examples in Netbeans, and the compiler complained when i typed in the last line :

verify(mock).write(argThat(arrayStartingWithA), eq(0),eq(1));

It preferred verify(mock).write((byte[])argThat(arrayStartingWithA), eq(0),eq(1));

have a nice day.

By: Peter Niederwieser

Peter Niederwieser — Sat, 24 Oct 2009 18:19:25 +0000

I agree that Mockito is a great Java mocking framework. However, there are frameworks in the Java and .Net world that make mocking even easier, typically by using a more flexible language than Java. One of them is Spock (www.spockframework.org), a Groovy-based testing framework for Java and Groovy apps (disclaimer: I’m the author of Spock). As an exercise, I translated your test code to Spock. I tried to stick as closely to your code as I could, even if that meant writing more code than would be necessary in idiomatic Groovy/Spock. Naturally, more complex tests (like your last example) will see a bigger gain than simple ones. Here is what I came up with:

void “iterator will return hello world”() {
given:
Iterator i = Mock()
i.next() >>> ["Hello", "World"]

when:
String result = i.next() + ” ” + i.next()

then:
result == “Hello World”
}

void “with arguments”() {
Comparable c = Mock()
c.compareTo(“Test”) >> 1
expect: c.compareTo(“Test”) == 1
}

void “with unspecified arguments”() {
Comparable c = Mock()
c.compareTo(_ as Int) >> -1
expect: c.compareTo(5) == -1
}

void “OutputStreamWriter rethrows an exception from OutputStream”() {
OutputStream mock = Mock()
OutputStreamWriter osw = new OutputStreamWriter(mock)
mock.close() >> { throw new IOException() }
when: osw.close()
then: thrown(IOException)
}

void “OutputStreamWriter closes OutputStream on close”() {
OutputStream mock = Mock()
OutputStreamWriter osw = new OutputStreamWriter(mock)
when: osw.close()
then: 1 * mock.close()
}

void “OutputStreamWriter buffers and forwards to OutputStream”() {
OutputStream mock = Mock()
OutputStreamWriter osw = new OutputStreamWriter(mock)

when:
osw.write(“a”)
osw.flush()

then:
1 * mock.write({ it[0] == “a” }, 0, 1)
}

By: mark

mark — Sat, 24 Oct 2009 14:37:41 +0000

I’m interested in mockito, but there’s one thing I’ve never seen addressed: Can I pass a mockito object as an argument to an ejb 3 stateless bean?

By: Franz See

Franz See — Sat, 24 Oct 2009 09:04:09 +0000

If you are testing Mockito, then the examples here are alright.

But in actual Mockito usage, this is not the proper way of using it. The mock objects are supposed to be collaborators not the actual object under test.