/
node_test.go
169 lines (149 loc) · 5.88 KB
/
node_test.go
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package bbolt
import (
"testing"
"unsafe"
"go.etcd.io/bbolt/internal/common"
)
// Ensure that a node can insert a key/value.
func TestNode_put(t *testing.T) {
m := &common.Meta{}
m.SetPgid(1)
n := &node{inodes: make(common.Inodes, 0), bucket: &Bucket{tx: &Tx{meta: m}}}
n.put([]byte("baz"), []byte("baz"), []byte("2"), 0, 0)
n.put([]byte("foo"), []byte("foo"), []byte("0"), 0, 0)
n.put([]byte("bar"), []byte("bar"), []byte("1"), 0, 0)
n.put([]byte("foo"), []byte("foo"), []byte("3"), 0, common.LeafPageFlag)
if len(n.inodes) != 3 {
t.Fatalf("exp=3; got=%d", len(n.inodes))
}
if k, v := n.inodes[0].Key(), n.inodes[0].Value(); string(k) != "bar" || string(v) != "1" {
t.Fatalf("exp=<bar,1>; got=<%s,%s>", k, v)
}
if k, v := n.inodes[1].Key(), n.inodes[1].Value(); string(k) != "baz" || string(v) != "2" {
t.Fatalf("exp=<baz,2>; got=<%s,%s>", k, v)
}
if k, v := n.inodes[2].Key(), n.inodes[2].Value(); string(k) != "foo" || string(v) != "3" {
t.Fatalf("exp=<foo,3>; got=<%s,%s>", k, v)
}
if n.inodes[2].Flags() != uint32(common.LeafPageFlag) {
t.Fatalf("not a leaf: %d", n.inodes[2].Flags())
}
}
// Ensure that a node can deserialize from a leaf page.
func TestNode_read_LeafPage(t *testing.T) {
// Create a page.
var buf [4096]byte
page := (*common.Page)(unsafe.Pointer(&buf[0]))
page.SetFlags(common.LeafPageFlag)
page.SetCount(2)
// Insert 2 elements at the beginning. sizeof(leafPageElement) == 16
nodes := page.LeafPageElements()
//nodes := (*[3]leafPageElement)(unsafe.Pointer(uintptr(unsafe.Pointer(page)) + unsafe.Sizeof(*page)))
nodes[0] = *common.NewLeafPageElement(0, 32, 3, 4) // pos = sizeof(leafPageElement) * 2
nodes[1] = *common.NewLeafPageElement(0, 23, 10, 3) // pos = sizeof(leafPageElement) + 3 + 4
// Write data for the nodes at the end.
const s = "barfoozhelloworldbye"
data := common.UnsafeByteSlice(unsafe.Pointer(uintptr(unsafe.Pointer(page))+unsafe.Sizeof(*page)+common.LeafPageElementSize*2), 0, 0, len(s))
copy(data, s)
// Deserialize page into a leaf.
n := &node{}
n.read(page)
// Check that there are two inodes with correct data.
if !n.isLeaf {
t.Fatal("expected leaf")
}
if len(n.inodes) != 2 {
t.Fatalf("exp=2; got=%d", len(n.inodes))
}
if k, v := n.inodes[0].Key(), n.inodes[0].Value(); string(k) != "bar" || string(v) != "fooz" {
t.Fatalf("exp=<bar,fooz>; got=<%s,%s>", k, v)
}
if k, v := n.inodes[1].Key(), n.inodes[1].Value(); string(k) != "helloworld" || string(v) != "bye" {
t.Fatalf("exp=<helloworld,bye>; got=<%s,%s>", k, v)
}
}
// Ensure that a node can serialize into a leaf page.
func TestNode_write_LeafPage(t *testing.T) {
// Create a node.
m := &common.Meta{}
m.SetPgid(1)
n := &node{isLeaf: true, inodes: make(common.Inodes, 0), bucket: &Bucket{tx: &Tx{db: &DB{}, meta: m}}}
n.put([]byte("susy"), []byte("susy"), []byte("que"), 0, 0)
n.put([]byte("ricki"), []byte("ricki"), []byte("lake"), 0, 0)
n.put([]byte("john"), []byte("john"), []byte("johnson"), 0, 0)
// Write it to a page.
var buf [4096]byte
p := (*common.Page)(unsafe.Pointer(&buf[0]))
n.write(p)
// Read the page back in.
n2 := &node{}
n2.read(p)
// Check that the two pages are the same.
if len(n2.inodes) != 3 {
t.Fatalf("exp=3; got=%d", len(n2.inodes))
}
if k, v := n2.inodes[0].Key(), n2.inodes[0].Value(); string(k) != "john" || string(v) != "johnson" {
t.Fatalf("exp=<john,johnson>; got=<%s,%s>", k, v)
}
if k, v := n2.inodes[1].Key(), n2.inodes[1].Value(); string(k) != "ricki" || string(v) != "lake" {
t.Fatalf("exp=<ricki,lake>; got=<%s,%s>", k, v)
}
if k, v := n2.inodes[2].Key(), n2.inodes[2].Value(); string(k) != "susy" || string(v) != "que" {
t.Fatalf("exp=<susy,que>; got=<%s,%s>", k, v)
}
}
// Ensure that a node can split into appropriate subgroups.
func TestNode_split(t *testing.T) {
// Create a node.
m := &common.Meta{}
m.SetPgid(1)
n := &node{inodes: make(common.Inodes, 0), bucket: &Bucket{tx: &Tx{db: &DB{}, meta: m}}}
n.put([]byte("00000001"), []byte("00000001"), []byte("0123456701234567"), 0, 0)
n.put([]byte("00000002"), []byte("00000002"), []byte("0123456701234567"), 0, 0)
n.put([]byte("00000003"), []byte("00000003"), []byte("0123456701234567"), 0, 0)
n.put([]byte("00000004"), []byte("00000004"), []byte("0123456701234567"), 0, 0)
n.put([]byte("00000005"), []byte("00000005"), []byte("0123456701234567"), 0, 0)
// Split between 2 & 3.
n.split(100)
var parent = n.parent
if len(parent.children) != 2 {
t.Fatalf("exp=2; got=%d", len(parent.children))
}
if len(parent.children[0].inodes) != 2 {
t.Fatalf("exp=2; got=%d", len(parent.children[0].inodes))
}
if len(parent.children[1].inodes) != 3 {
t.Fatalf("exp=3; got=%d", len(parent.children[1].inodes))
}
}
// Ensure that a page with the minimum number of inodes just returns a single node.
func TestNode_split_MinKeys(t *testing.T) {
// Create a node.
m := &common.Meta{}
m.SetPgid(1)
n := &node{inodes: make(common.Inodes, 0), bucket: &Bucket{tx: &Tx{db: &DB{}, meta: m}}}
n.put([]byte("00000001"), []byte("00000001"), []byte("0123456701234567"), 0, 0)
n.put([]byte("00000002"), []byte("00000002"), []byte("0123456701234567"), 0, 0)
// Split.
n.split(20)
if n.parent != nil {
t.Fatalf("expected nil parent")
}
}
// Ensure that a node that has keys that all fit on a page just returns one leaf.
func TestNode_split_SinglePage(t *testing.T) {
// Create a node.
m := &common.Meta{}
m.SetPgid(1)
n := &node{inodes: make(common.Inodes, 0), bucket: &Bucket{tx: &Tx{db: &DB{}, meta: m}}}
n.put([]byte("00000001"), []byte("00000001"), []byte("0123456701234567"), 0, 0)
n.put([]byte("00000002"), []byte("00000002"), []byte("0123456701234567"), 0, 0)
n.put([]byte("00000003"), []byte("00000003"), []byte("0123456701234567"), 0, 0)
n.put([]byte("00000004"), []byte("00000004"), []byte("0123456701234567"), 0, 0)
n.put([]byte("00000005"), []byte("00000005"), []byte("0123456701234567"), 0, 0)
// Split.
n.split(4096)
if n.parent != nil {
t.Fatalf("expected nil parent")
}
}