func TestVersions(t *testing.T) {
path, err := ioutil.TempDir("", "gocrudldb_")
if err != nil {
t.Fatal("Opening leveldb file")
return
}
store.Get().Init(path) // leveldb
c := req.NewContext(10)
var d int
for d = 660; d < 670; d++ {
if err = store.NewUpdate("Ticker", "GOOG").SetSource("nasdaq").
Set("price", d).Execute(c); err != nil {
t.Errorf("When updating store: %+v", err)
t.Fail()
}
}
result, err := store.NewQuery("GOOG").Run()
if err != nil {
t.Errorf("When querying store: %+v", err)
t.Fail()
}
versions, present := result.Columns["price"]
if !present {
t.Errorf("Column price should be present: %+v", result)
t.Fail()
}
if versions.Count() != 10 {
t.Errorf("Num count expected: 10. Got: %v", versions.Count())
}
if versions.Latest().Value.(float64) != 669 {
t.Errorf("Latest value expected 669. Got: %v", versions.Latest())
}
if versions.Oldest().Value.(float64) != 660 {
t.Errorf("Oldest value expected 660. Got: %v", versions.Oldest())
}
type jval struct {
Kind string `json:"kind,omitempty"`
Id string `json:"id,omitempty"`
Source string `json:"modifier,omitempty"`
Price int `json:"price,omitempty"`
}
js, err := result.ToJson()
if err != nil {
t.Errorf("While converting to JSON: %v", err)
}
t.Log(string(js))
var jv jval
if err = json.Unmarshal(js, &jv); err != nil {
t.Errorf("While unmarshal to struct: %v", err)
}
if jv.Price != 669 {
t.Errorf("Latest value expected 669. Got: %+v", jv)
}
if jv.Source != "nasdaq" {
t.Errorf("Source expected nasdaq. Got: %+v", jv)
}
}
func ExampleStore() {
path, err := ioutil.TempDir("", "gocrudldb_")
if err != nil {
x.LogErr(log, err).Fatal("Opening file")
return
}
store.Get().Init(path) // leveldb
// Update some data.
c := req.NewContext(10) // 62^10 permutations
err = store.NewUpdate("Root", "bigbang").SetSource("author").
Set("when", "13.8 billion years ago").Set("explosive", true).Execute(c)
if err != nil {
x.LogErr(log, err).Fatal("Commiting update")
return
}
// Retrieve that data
result, err := store.NewQuery("bigbang").Run()
if err != nil {
x.LogErr(log, err).Fatal("While querying store")
return
}
fmt.Println(result.Kind) // Root
fmt.Println(result.Id) // bigbang
data := result.ToMap()
{
val, ok := data["explosive"]
if !ok {
log.Fatal("creator should be set")
return
}
fmt.Println(val) // true
}
{
val, ok := data["when"]
if !ok {
log.Fatal("creator should be set")
return
}
fmt.Println(val)
}
// Output:
// Root
// bigbang
// true
// 13.8 billion years ago
}