dunit r247

[Nick Sabalausky]

"Christopher Wright" <dhasenan at gmail.com> wrote in message 
news:gpuibc$1nrv$1 at digitalmars.com...
> bearophile wrote:
>> What's the advantage of:
>> expect(foo(5), equals(3) | greaterThan(5));
>> Compared to:
>> expect(foo(5) == 3 | foo(5) > 5);
>
> What error message should that give?
>
> The former gives:
> Expected: equal to 3 or greater than 5
> But was: <whatever value foo(5) returned>
>
> The latter gives:
> Assertion error
>

The nice thing about D is how often it lets you, as I prefer to word it, 
"Eat your cake and then still have it."

Attached is the assert-alternative that I use (D1/Tango). It's used like 
this:

---------------------
module nonFatalAssertTest.main;

import semitwist.util.nonFatalAssert;

void main()
{
    FatalizeAsserts();
    // Main program code here
}

unittest
{
    int foo = 2;

    // *REALLY* need a way for a template to automatically get
    // the file/line of instantiation.
    // Improvement to mixin syntax would also be nice
    // Also, my editor doesn't know that backticks indicate a string,
    // so it's still properly highlighted as code :)
    mixin(NonFatalAssert!(__LINE__, __FILE__, `foo == 3 || foo > 5`, "foo is 
bad"));
    mixin(NonFatalAssert!(__LINE__, __FILE__, `2 + 2 == 4`, "Basic 
arithmetic"));
    mixin(NonFatalAssert!(__LINE__, __FILE__, `false`));
}
---------------------

Output of that is:

---------------------
nonFatalAssertTest\main.d(16): Assert Failure (foo == 3 || foo > 5): foo is 
bad
nonFatalAssertTest\main.d(18): Assert Failure (false)
tango.core.Exception.AssertException at semitwist\util\nonFatalAssert.d(62): 2 
Assert Failures
---------------------

Granted, this doesn't currently output foo's actual value, but it probably 
wouldn't be too hard to modify it to do so via std.algorithm-style trickery. 


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`
end