fvtt-cthulhu-eternal/node_modules/abstract-level/test/iterator-no-snapshot-test.js

64 lines
1.8 KiB
JavaScript

'use strict'
exports.noSnapshot = function (test, testCommon) {
function make (run) {
return function (t) {
const db = testCommon.factory()
const operations = [
{ type: 'put', key: 'a', value: 'a' },
{ type: 'put', key: 'b', value: 'b' },
{ type: 'put', key: 'c', value: 'c' }
]
db.open(function (err) {
t.ifError(err, 'no open error')
db.batch(operations, function (err) {
t.ifError(err, 'no batch error')
// For this test it is important that we don't read eagerly.
// NOTE: highWaterMarkBytes is not an abstract option, but
// it is supported by classic-level and others. Also set the
// old & equivalent leveldown highWaterMark option for compat.
const it = db.iterator({ highWaterMarkBytes: 0, highWaterMark: 0 })
run(db, function (err) {
t.ifError(err, 'no run error')
verify(t, it, db)
})
})
})
}
}
function verify (t, it, db) {
it.all(function (err, entries) {
t.ifError(err, 'no iterator error')
const kv = entries.map(function ([key, value]) {
return key.toString() + value.toString()
})
if (kv.length === 3) {
t.same(kv, ['aa', 'bb', 'cc'], 'maybe supports snapshots')
} else {
t.same(kv, ['aa', 'cc'], 'ignores keys that have been deleted in the mean time')
}
db.close(t.end.bind(t))
})
}
test('delete key after creating iterator', make(function (db, done) {
db.del('b', done)
}))
test('batch delete key after creating iterator', make(function (db, done) {
db.batch([{ type: 'del', key: 'b' }], done)
}))
}
exports.all = function (test, testCommon) {
exports.noSnapshot(test, testCommon)
}