Re: Need help designing some JUnit tests

From:

Lew <noone@lewscanon.com>

Newsgroups:

comp.lang.java.programmer

Date:

Fri, 21 May 2010 07:58:04 -0400

Message-ID:

<ht5sg7$c4r$1@news.albasani.net>

On 05/21/2010 06:57 AM,
Rhino wrote:

if (Foo == null) fail("Constructor failed to instantiate the
class");

Eric Sosman wrote:

Rhino, if you keep on spewing this sort of codecrap I'm going
to shove that horn of yours firmly up the orifice that spews.

Rhino wrote:

I'm really not sure what you mean by "codecrap" here. I assume you're

He's referring to the fact that the code you showed will not compile.

saying that it won't compile but, in fact, this is a line from an actual
test case with the class name changed to Foo. Here is the full unit test,

Nope. What you should have shown is the *instance* name changed to 'foo'.

WITHOUT the name change, copied and pasted directly from the test case
and I assure you that this does compile:

public void testGetInstance() {

StringUtils stringUtils = StringUtils.getInstance();
if (stringUtils == null) fail("testGetInstance() failed");
}

Rhino, Rhino, Rhino.

In the code about which Eric complained, you compared 'Foo', a *class*, to
'null'. That WILL NOT COMPILE!

In the code you assure us does compile you compare an instance to 'null'. Of
course that compiles.

Apples and oranges.

You cannot compare a class to 'null', only an instance. Classes and instances
are different things. What works for one does not necessarily work for the other.

Also, that "actual" code you show neglects the curly braces around the
statement body of the 'if'.

--
Lew