[onmerchantvalidation-attribute.https.html]
[onmerchantvalidation attribute and listeners both work]
expected: FAIL
[Must have a onmerchantvalidation IDL attribute]
expected: FAIL
[onmerchantvalidation attribute is a generic handler for "merchantvalidation"]
expected: FAIL
[onmerchantvalidation attribute is a handler for MerchantValidationEvent]
expected: FAIL