On Dec 14, Michael Schwern wrote:
> Constructors fail often enough that I felt it worthwhile to write a
> test function for them.
>
> You could leave off the test entirely and just trust that you use $foo
> later on down in the test and it'll explode there, but its better to
> put the point of failure as close to where the bug is as possible.
> And you get no diagnostic information (see below).
>
> The equivalent code without isa_ok() would be:
>
> my $foo = Foo->new;
> ok( $foo->isa('Foo') );
>
> except should $foo be unblessed or undef that will explode. You have
> to start doing things like:
>
> my $foo = Foo->new;
> ok( defined $foo && $foo->isa('Foo') );
>
> which rapidly gets tiresome.
Or ok(UNIVERSAL::isa(Foo->new, 'Foo'));
- Kurt
