// retoor <retoor@molodetz.nl>
import "dataset" for Dataset
import "tempfile" for TempFile
import "io" for File
var path = TempFile.mkstemp(".db")
var ds = Dataset.open(path)
var users = ds["users"]
users.insert({"name": "Alice"})
var result = users.find({"nonexistent": "value"})
System.print(result.count) // expect: 0
var one = users.findOne({"missing_col": "test"})
System.print(one == null) // expect: true
var all = users.all()
System.print(all.count) // expect: 1
ds.close()
File.delete(path)