== 1. mint and ownerOf
mint #1 to alice | alice | status=1 | Transfer(zero->alice, id=1) topics=4 data=0x
mint #2 to alice | alice | status=1 | Transfer(zero->alice, id=2) topics=4 data=0x
mint #3 to alice | alice | status=1 | Transfer(zero->alice, id=3) topics=4 data=0x
ownerOf(1..3)=['alice', 'alice', 'alice'] balanceOf(alice)=3
Transfer topic0 = 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef (same as ERC-20)
supportsInterface: {'ERC165': True, 'ERC721': True, 'Metadata': True, 'Enumerable': False, 'invalid': False}
== 2. transfer to contracts
safeTransferFrom #1 -> Counter | alice | status=0 | execution reverted: receiver rejected
safeTransferFrom #2 -> StudyReceiver | alice | status=1 | Transfer(alice->StudyReceiver, id=2) topics=4 data=0x
transferFrom #1 -> Counter | alice | status=1 | Transfer(alice->Counter, id=1) topics=4 data=0x
alice pulls #1 back from Counter | alice | status=0 | execution reverted: not authorized
alice approves herself for #1 | alice | status=0 | execution reverted: not owner nor operator
StudyReceiver.withdraw #2 -> alice | keeper | status=1 | Transfer(StudyReceiver->alice, id=2) topics=4 data=0x
ownerOf(1)=Counter ownerOf(2)=alice
== 3. approve vs setApprovalForAll
mint #4 to alice | alice | status=1 | Transfer(zero->alice, id=4) topics=4 data=0x
approve carol for #3 | alice | status=1 | Approval(alice, carol, id=3)
carol moves #4 | carol | status=0 | execution reverted: not authorized
carol moves #3 | carol | status=1 | Transfer(alice->carol, id=3) topics=4 data=0x
getApproved(3)=zero after the transfer
setApprovalForAll(bob, true) | alice | status=1 | ApprovalForAll(alice, bob, True)
bob moves #2 | bob | status=1 | Transfer(alice->bob, id=2) topics=4 data=0x
bob moves #4 | bob | status=1 | Transfer(alice->bob, id=4) topics=4 data=0x
mint #5 to alice (after the approval) | alice | status=1 | Transfer(zero->alice, id=5) topics=4 data=0x
bob moves #5 | bob | status=1 | Transfer(alice->bob, id=5) topics=4 data=0x
setApprovalForAll(bob, false) | alice | status=1 | ApprovalForAll(alice, bob, False)
mint #6 to alice | alice | status=1 | Transfer(zero->alice, id=6) topics=4 data=0x
bob moves #6 | bob | status=0 | execution reverted: not authorized
holdings={'alice': [6], 'bob': [2, 4, 5], 'carol': [3]}
== 4. tokenURI and metadata (token #2)
initial | block=24 owner=bob | http://127.0.0.1:WEB/v1/2.json -> {'name': 'Study NFT #2', 'image': 'http://127.0.0.1:WEB/img/blue.svg'}
server edits v1/2.json | block=24 owner=bob | http://127.0.0.1:WEB/v1/2.json -> {'name': 'Study NFT #2', 'image': 'http://127.0.0.1:WEB/img/red.svg'}
setBaseURI(v2) | alice | status=1 | no event
after setBaseURI | block=25 owner=bob | http://127.0.0.1:WEB/v2/2.json -> {'name': 'Study NFT #2 (v2)', 'image': 'http://127.0.0.1:WEB/img/green.svg'}
server deletes v2/2.json | block=25 owner=bob | http://127.0.0.1:WEB/v2/2.json -> HTTP 404
Assertions: PASS