expectations on all instances on JMockit

Question

I was expecting JMockit to set expectations on all instances. However, that does not work when I add a constructor expectation to the mix.

class Foo {
    Foo(int i) {}
    void foo() {}
}

@Test
public void expectationsOnAllInstances__Works(@Mocked Foo foo) {
    new Expectations() {{
        foo.foo();
    }};
    new Foo(3).foo();
}

@Test
public void expectationsOnAllInstances__DoesntWork(@Mocked Foo foo) {
    new Expectations() {{
        new Foo(3);  // <==== this constructor expectation messes things up ...
        foo.foo();
    }};
    new Foo(3).foo();
}

The second test fails with error:

Missing 1 invocation to:
Foo#foo()
   on mock instance: Foo@617faa95
instead got:
Foo#foo()
   on mock instance: Foo@1e127982

JMockit 1.48

Thanks!

Answer 1

Well, the expectationsOnAllInstances__DoesntWork test is inconsistent between the expectations recorded and replayed...

What you really want is one of these two other versions:

    @Test
    public void expectationsOnAllInstances_consistent1(@Mocked Foo foo) {
        new Expectations() {{
            new Foo(3).foo();
        }};

        new Foo(3).foo();
    }

    @Test
    public void expectationsOnAllInstances_consistent2(@Mocked Foo foo) {
        new Expectations() {{
            new Foo(3);
            foo.foo();
        }};

        new Foo(3);
        foo.foo();
    }