public void TestSnapshot()
{
var path = CleanTestDB();
using (var db = new LDB(path, new Options {
CreateIfMissing = true
}))
{
db.Set("Tampa", "green");
db.Set("London", "red");
db.Remove("New York");
using (var snapShot = db.CreateSnapshot())
{
var readOptions = new ReadOptions {
Snapshot = snapShot
};
db.Set("New York", "blue");
Assert.Equal((string)db.Get("Tampa", readOptions), "green");
Assert.Equal((string)db.Get("London", readOptions), "red");
// Snapshot taken before key was updates
Assert.Null(db.Get("New York", readOptions));
}
// can see the change now
Assert.Equal((string)db.Get("New York"), "blue");
}
}
public void TestSnapshot()
{
var path = CleanTestDB();
using(var db = new LDB(path, new Options { CreateIfMissing = true }))
{
db.Set("Tampa", "green");
db.Set("London", "red");
db.Remove("New York");
using(var snapShot = db.CreateSnapshot())
{
var readOptions = new ReadOptions { Snapshot = snapShot };
db.Set("New York", "blue");
Assert.Equal((string)db.Get("Tampa", readOptions), "green");
Assert.Equal((string)db.Get("London", readOptions), "red");
// Snapshot taken before key was updates
Assert.Null(db.Get("New York", readOptions));
}
// can see the change now
Assert.Equal((string)db.Get("New York"), "blue");
}
}
