Upgrade a database, open a second connection at the same version, ensure specifying a lower version causes an error

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

dbname = "intversion-upgrades.html"
indexedDB.deleteDatabase(dbname)
PASS String(request) is "[object IDBOpenDBRequest]"


Call open with no version parameter:
indexedDB.open(dbname)


initialUpgradeNeeded():


openSuccess():
connection1 = event.target.result
PASS connection1.version is 1
connection1.onversionchange = connection1VersionChangeCallback
request = indexedDB.open(dbname, 2)


connection1VersionChangeCallback():
connection1.close()


connection2UpgradeNeeded():
connection2 = event.target.result
PASS String(connection2) is "[object IDBDatabase]"
PASS String(request.transaction) is "[object IDBTransaction]"
PASS event.oldVersion is 1
PASS event.newVersion is 2
request.transaction.oncomplete = transactionCompleted


transactionCompleted():
didTransactionComplete = true


connection2Success():
PASS didTransactionComplete is true
PASS event.target.result is connection2
The next connection opens the database at the same version so connection2 shouldn't get a versionchange event.
connection2.onversionchange = unexpectedVersionChangeCallback
PASS String(connection2) is "[object IDBDatabase]"
PASS request.transaction is null
PASS connection2.version is 2
request = indexedDB.open(dbname, 2)
request.onsuccess = connection3Success
request.onblocked = unexpectedBlockedCallback


connection3Success():
event.target.result.close()
connection2.close()
connection3 = event.target.result
PASS connection3.version is 2
request = indexedDB.open(dbname, 1)
request.onerror = errorWhenTryingLowVersion


errorWhenTryingLowVersion():
request.error.message = The requested version (1) is less than the existing version (2).
request = indexedDB.open(dbname, 4)
request.onupgradeneeded = connection4UpgradeNeeded
request.onsuccess = connection4Success


connection4UpgradeNeeded():
gotConnection4UpgradeNeeded = true
PASS event.oldVersion is 2
PASS event.newVersion is 4


connection4Success():
PASS gotConnection4UpgradeNeeded is true
connection4 = event.target.result
PASS connection4.version is 4
connection4.close()
request = indexedDB.open(dbname)
request.onsuccess = connection5Success


connection5Success():
db = event.target.result
PASS db.version is 4
PASS successfullyParsed is true

TEST COMPLETE