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index_test.go
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index_test.go
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package epos
import (
"bytes"
"reflect"
"testing"
)
func TestIndexSimple(t *testing.T) {
db, err := OpenDatabase("testdb_index", STORAGE_AUTO)
if err != nil {
t.Fatalf("couldn't open testdb_index: %v", err)
}
defer db.Close()
id, err := db.Coll("tbl").Insert(map[string]string{"foo": "bar", "baz": "quux", "bla": "fasel"})
if err != nil {
t.Error("Insert failed: ", err)
}
t.Logf("insert id = %d", id)
if err = db.Coll("tbl").AddIndex("foo"); err != nil {
t.Fatal("AddIndex failed: ", err)
}
id, err = db.Coll("tbl").Insert(map[string]string{"foo": "abc", "baz": "def", "bla": "asdfqwer"})
if err != nil {
t.Error("Insert failed: ", err)
}
// plausibility check on the internal data structures:
if idx := db.Coll("tbl").indexes["foo"]; idx == nil {
t.Error("no actual index has been created!")
} else if len(idx.data) != 2 {
t.Errorf("expected two entries to be in the index for foo, found only %d (index: %#v)", len(idx.data), idx)
} else {
t.Logf("index data for foo: %#v", idx.data)
}
db.Remove()
}
func TestReadWriteIndex(t *testing.T) {
buf := bytes.NewBuffer([]byte{})
idx_entry := &indexEntry{deleted: false, value: "value", id: 9001}
n, err := idx_entry.WriteTo(buf)
if err != nil {
t.Fatalf("WriteTo failed: %v", err)
}
entry2 := &indexEntry{}
m, err := entry2.ReadFrom(buf)
if err != nil {
t.Fatalf("ReadFrom failed: %v", err)
}
if n != m {
t.Errorf("different amounts of data were written and read (%d vs. %d)", n, m)
}
if !reflect.DeepEqual(idx_entry, entry2) {
t.Errorf("entry and entry2 are different! %#v vs. %#v", idx_entry, entry2)
}
}
type entry struct {
X string
Y int
Z float64
}
var testdata = []struct {
Entry entry
NewX string
NewY int
NewZ float64
Id Id
}{
{Entry: entry{X: "John Doe", Y: 23, Z: 1.85}, NewX: "Max Mustermann", NewY: 42, NewZ: 1.83, Id: Id(0)},
{Entry: entry{X: "Jan Maier", Y: 17, Z: 1.75}, NewX: "Franz Huber", NewY: 19, NewZ: 1.97, Id: Id(0)},
{Entry: entry{X: "Franz Haber", Y: 19, Z: 1.90}, NewX: "Franz Haber-Oettinger", NewY: 19, NewZ: 1.90, Id: Id(0)},
}
func TestIndexInsertUpdateDelete(t *testing.T) {
db, err := OpenDatabase("testdb_index_iud", STORAGE_AUTO)
if err != nil {
t.Fatalf("couldn't open testdb_index_iud: %v", err)
}
defer db.Close()
coll := db.Coll("persons")
coll.AddIndex("X")
for i, e := range testdata {
id, err := coll.Insert(e.Entry)
if err != nil {
t.Errorf("%d. Insert failed: %v", i, err)
}
testdata[i].Id = id
testdata[i].Entry.X = e.NewX
testdata[i].Entry.Y = e.NewY
testdata[i].Entry.Z = e.NewZ
}
if len(coll.indexes["X"].data) != 3 {
t.Errorf("Index doesn't contain 3 entries for field X even though we just inserted 3 records, %d instead.", len(coll.indexes["X"].data))
}
coll.AddIndex("Y")
if len(coll.indexes["Y"].data) != 3 {
t.Errorf("Index doesn't contain 3 entries for field Y, %d instead.", len(coll.indexes["Y"].data))
}
for i, e := range testdata {
err := coll.Update(e.Id, e.Entry)
if err != nil {
t.Errorf("%d. Update failed: %v", i, err)
}
}
if len(coll.indexes["X"].data) != 3 {
t.Errorf("Index doesn't contain 3 entries for field X even though we just updated 3 records, %d instead.", len(coll.indexes["X"].data))
t.Logf("index: %#v", coll.indexes["X"].data)
}
if len(coll.indexes["Y"].data) != 2 {
t.Errorf("Index doesn't contain 2 entries for field Y even though we just updated 3 records, %d instead.", len(coll.indexes["Y"].data))
t.Logf("index: %#v", coll.indexes["Y"].data)
}
if len(coll.indexes["Y"].data["19"]) != 2 {
t.Errorf("Index doesn't contain 2 IDs for data 19, %d instead.", len(coll.indexes["Y"].data["19"]))
t.Logf("index: %#v", coll.indexes["Y"].data["19"])
}
for i, e := range testdata {
found := false
for k, v := range coll.indexes["X"].data {
if k == e.Entry.X && len(v) == 1 && v[0].id == int64(e.Id) {
found = true
break
}
}
if !found {
t.Errorf("%d. couldn't find entry in X index for data '%s'", i, e.Entry.X)
}
}
for i, e := range testdata {
err := coll.Delete(e.Id)
if err != nil {
t.Errorf("%d. Delete failed: %v", i, err)
}
}
if len(coll.indexes["X"].data) != 0 {
t.Errorf("Index for X isn't empty: %v", coll.indexes["X"].data)
}
if len(coll.indexes["Y"].data) != 0 {
t.Errorf("Index for Y isn't empty: %v", coll.indexes["Y"].data)
}
if err = db.Vacuum(); err != nil {
t.Errorf("Vacuum failed: %v", err)
}
db.Remove()
}