Tests the digest() method using ArrayBuffer

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".

PASS: sha-256 of [0] should be [6e340b9cffb37a989ca544e6bb780a2c78901d3fb33738768511a30617afa01d] and was
PASS successfullyParsed is true

TEST COMPLETE