[MO-java-dev] expect() validations?

[Barry K. <bk...@in...>]

(Steve)

As part of the latest DM overhual, is the issue of performing some 
validation (ie, fail fast) of expectations? For example, given:

public interface Foo {
     public void bar(Blob blob);
}
...
// 1. no method tweetle on interface
mockFoo.expect("tweetle", aBlob);
// 2. no bar method that takes two arguments
mockFoo.expect("bar", C.args(C.eq(aBlob), C.eq(aTweetle)));
// 3. no bar method that returns a Tweetle
mockFoo.expectAndReturn("bar", aBlob, aTweetle);
// 4. no bar method that takes a Tweetle argument
mockFoo.expect("bar", C.eq(aTweetle));

----

1, 2, 3 /could/ be done with the current design. It just isnt' resulting 
  strange test executions that could have failed immediatly at setup time.

4 would require some method of "knowing" a constraint's type. That is 
the type of its argument. Of course this may not always be possible, but 
when it is could be used to help validate the expectations.

-bk