Negative coverage requested for ArrayBuffer methods

[gibson042]

@phoddie reported a subtle bug in Moddable XS that would have been caught by some testing here:

function speciesCtor() {
  throw new Error("species constructor should not be invoked");
}
speciesCtor[Symbol.species] = speciesCtor;

const ab = new ArrayBuffer();
ab.constructor = speciesCtor;
ab.transfer();

This is applicable to transfer, transferToFixedLength, sliceToImmutable, and transferToImmutable.

[phoddie]

Thanks for opening this @gibson042. The behavior of skipping the species check is new-ish and inconsistent across ArrayBuffer – slice() supports species, for example. Tests to ensure that's being handled properly in all cases would help avoid subtle mistakes like the one we made.