1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
|
package memdb
import (
"testing"
"time"
)
func TestMemDB_SingleWriter_MultiReader(t *testing.T) {
db, err := NewMemDB(testValidSchema())
if err != nil {
t.Fatalf("err: %v", err)
}
tx1 := db.Txn(true)
tx2 := db.Txn(false) // Should not block!
tx3 := db.Txn(false) // Should not block!
tx4 := db.Txn(false) // Should not block!
doneCh := make(chan struct{})
go func() {
defer close(doneCh)
db.Txn(true)
}()
select {
case <-doneCh:
t.Fatalf("should not allow another writer")
case <-time.After(10 * time.Millisecond):
}
tx1.Abort()
tx2.Abort()
tx3.Abort()
tx4.Abort()
select {
case <-doneCh:
case <-time.After(10 * time.Millisecond):
t.Fatalf("should allow another writer")
}
}
func TestMemDB_Snapshot(t *testing.T) {
db, err := NewMemDB(testValidSchema())
if err != nil {
t.Fatalf("err: %v", err)
}
// Add an object
obj := testObj()
txn := db.Txn(true)
txn.Insert("main", obj)
txn.Commit()
// Clone the db
db2 := db.Snapshot()
// Remove the object
txn = db.Txn(true)
txn.Delete("main", obj)
txn.Commit()
// Object should exist in second snapshot but not first
txn = db.Txn(false)
out, err := txn.First("main", "id", obj.ID)
if err != nil {
t.Fatalf("err: %v", err)
}
if out != nil {
t.Fatalf("should not exist %#v", out)
}
txn = db2.Txn(true)
out, err = txn.First("main", "id", obj.ID)
if err != nil {
t.Fatalf("err: %v", err)
}
if out == nil {
t.Fatalf("should exist")
}
}
|