Test that HMAC operations only work when hash functions match between invocation and key. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Importing a raw HMAC SHA-1 key from string literal... Done PASS crypto.subtle.sign({name: 'hmac', hash: {name: 'sha-1'}}, key, asciiToUint8Array('foo')) did not throw exception. PASS crypto.subtle.sign({name: 'hmac', hash: {name: 'sha-256'}}, key, asciiToUint8Array('foo')) threw exception Error: NotSupportedError: DOM Exception 9. PASS crypto.subtle.verify({name: 'hmac', hash: {name: 'sha-1'}}, key, asciiToUint8Array('fake signature'), asciiToUint8Array('foo')) did not throw exception. PASS crypto.subtle.verify({name: 'hmac', hash: {name: 'sha-256'}}, key, asciiToUint8Array('fake signature'), asciiToUint8Array('foo')) threw exception Error: NotSupportedError: DOM Exception 9. PASS successfullyParsed is true TEST COMPLETE