bbolt/sys_test.go

71 lines
1.8 KiB
Go

package bolt
import (
"testing"
"unsafe"
"github.com/stretchr/testify/assert"
)
// Ensure that a system page can set a bucket.
func TestSysPut(t *testing.T) {
s := &sys{buckets: make(map[string]*bucket)}
s.put("foo", &bucket{root: 2})
s.put("bar", &bucket{root: 3})
s.put("foo", &bucket{root: 4})
assert.Equal(t, len(s.buckets), 2)
assert.Equal(t, s.get("foo").root, pgid(4))
assert.Equal(t, s.get("bar").root, pgid(3))
assert.Nil(t, s.get("no_such_bucket"))
}
// Ensure that a system page can deserialize from a page.
func TestSysRead(t *testing.T) {
// Create a page.
var buf [4096]byte
page := (*page)(unsafe.Pointer(&buf[0]))
page.count = 2
// Insert 2 buckets at the beginning.
buckets := (*[3]bucket)(unsafe.Pointer(&page.ptr))
buckets[0] = bucket{root: 3}
buckets[1] = bucket{root: 4}
// Write data for the nodes at the end.
data := (*[4096]byte)(unsafe.Pointer(&buckets[2]))
data[0] = 3
copy(data[1:], []byte("bar"))
data[4] = 10
copy(data[5:], []byte("helloworld"))
// Deserialize page into a system page.
s := &sys{buckets: make(map[string]*bucket)}
s.read(page)
// Check that there are two items with correct data.
assert.Equal(t, len(s.buckets), 2)
assert.Equal(t, s.get("bar").root, pgid(3))
assert.Equal(t, s.get("helloworld").root, pgid(4))
}
// Ensure that a system page can serialize itself.
func TestSysWrite(t *testing.T) {
s := &sys{buckets: make(map[string]*bucket)}
s.put("foo", &bucket{root: 2})
s.put("bar", &bucket{root: 3})
// Write it to a page.
var buf [4096]byte
p := (*page)(unsafe.Pointer(&buf[0]))
s.write(p)
// Read the page back in.
s2 := &sys{buckets: make(map[string]*bucket)}
s2.read(p)
// Check that the two pages are the same.
assert.Equal(t, len(s.buckets), 2)
assert.Equal(t, s.get("foo").root, pgid(2))
assert.Equal(t, s.get("bar").root, pgid(3))
}