func ExamplePutSnapshots() {
tbl, err := Create(TableOption{"/test-table-0000", filesystem.NewMemoryFileSystem(), true})
if err != nil {
fmt.Println(err)
}
tbl.PutSnapshots([]byte("key"), []Snapshot{{
Info: SnapshotInfo{100, 7},
Value: []byte("history"),
}, {
Info: SnapshotInfo{200, 8},
Value: []byte("history2"),
}, {
Info: SnapshotInfo{300, 5},
Value: []byte("test0"),
}})
c, cerr := tbl.GetSnapshots([]byte("key"))
for snapshot := range c {
fmt.Println(string(snapshot.Value))
}
fmt.Println(<-cerr)
// Output:
// history
// history2
// test0
// <nil>
}
func ExampleGetSnapshots() {
tbl, err := Create(TableOption{"/test-table-0000", filesystem.NewMemoryFileSystem(), true})
if err != nil {
fmt.Println(err)
}
tbl.Put([]byte("key"), []byte("history1"))
tbl.Put([]byte("key"), []byte("history2"))
tbl.Put([]byte("key2"), []byte("history3"))
tbl.Put([]byte("key"), []byte("history4"))
c, cerr := tbl.GetSnapshots([]byte("key"))
for snapshot := range c {
fmt.Println(string(snapshot.Value))
}
fmt.Println(<-cerr)
c, cerr = tbl.GetSnapshots([]byte("key2"))
for snapshot := range c {
fmt.Println(string(snapshot.Value))
}
fmt.Println(<-cerr)
c, cerr = tbl.GetSnapshots([]byte("key3"))
for snapshot := range c {
fmt.Println(string(snapshot.Value))
}
fmt.Println(<-cerr)
fmt.Println("KEYS:")
for key := range tbl.Keys() {
fmt.Println(string(key))
}
if err := tbl.Drop(); err != nil {
fmt.Println(err)
}
// Output:
// history1
// history2
// history4
// <nil>
// history3
// <nil>
// file does not exist
// KEYS:
// key
// key2
}
func TestPutAndGet(t *testing.T) {
const (
getOp = iota
putOp
)
type Operation struct {
op int
key string
value string
err error
}
examples := []struct {
tableOption TableOption
operations []Operation
}{{
TableOption{"/test-table-0001", filesystem.NewMemoryFileSystem(), false},
[]Operation{},
}, {
TableOption{"/test-table-0002", filesystem.NewMemoryFileSystem(), true},
[]Operation{},
}, {
TableOption{"/test-table-0003", filesystem.NewMemoryFileSystem(), false},
[]Operation{
{putOp, "hello", "world", nil},
{putOp, "hello", "world2", nil},
{getOp, "world", "", os.ErrNotExist},
{getOp, "hello", "world2", nil},
},
}, {
TableOption{"/test-table-0004", filesystem.NewMemoryFileSystem(), true},
[]Operation{
{putOp, "hello", "world", nil},
{putOp, "hello", "world2", nil},
{getOp, "world", "", os.ErrNotExist},
{getOp, "hello", "world2", nil},
},
}, {
TableOption{"/test-table-0005", filesystem.NewMemoryFileSystem(), true},
[]Operation{
{putOp, "hello", "world", nil},
{putOp, "hello", "world1", nil},
{putOp, "hello", "world123", nil},
{putOp, "hello", "world45678", nil},
{putOp, "hello", "world9", nil},
{putOp, "hello", "world100", nil},
{putOp, "hello", "world23", nil},
{getOp, "world", "", os.ErrNotExist},
{getOp, "hello", "world23", nil},
},
}}
for i, testCase := range examples {
tbl, err := Create(testCase.tableOption)
if err != nil {
t.Error(err)
}
for j, e := range testCase.operations {
if e.op == getOp {
value, err := tbl.Get([]byte(e.key))
if string(value) != e.value {
t.Errorf("%d.%d. %s expected but %s found", i, j, e.value, value)
}
if err != e.err {
t.Errorf("%d.%d. %v", i, j, err)
}
} else if e.op == putOp {
if err := tbl.Put([]byte(e.key), []byte(e.value)); err != e.err {
t.Errorf("%d.%d. %v", i, j, err)
}
}
}
if err := tbl.Drop(); err != nil {
t.Error(err)
}
}
}