Software usage TestU01

I'm doing some statistical test on a RNG and I'm trying to use this. I've asked somethings on the crypto subsite about the dieharder tests suits and they closed my question because "programming" was the right subsite that I should use.

I hope that this is the right place.

Some people told me that the TestU01 needed a file of size 2Gb to run all it's test not a bit more, but reading from the manual I didn't find this information. Is this true?

Also is there a function that run all the test on a single binary file? I've found this code:

int main (void)
{
   unif01_Gen *gen;
   gen = ufile_CreateReadBin ("myfile.bin, 16384);
   bbattery_Crush (gen);
   ufile_DeleteReadBin (gen);
   return 0;
}

always reading the manual I've found this function bbattery_BigCrush that have more tests but there are other function and I don't know if are included in this.