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test_query.go
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test_query.go
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package end2end
import (
"context"
"fmt"
"github.com/dal-go/dalgo-end2end-tests/models"
"github.com/dal-go/dalgo/dal"
"github.com/stretchr/testify/assert"
"reflect"
"sort"
"testing"
"time"
)
func selectAllCities(ctx context.Context, db dal.DB) (records []dal.Record, err error) {
q := dal.From(models.CitiesCollection).SelectInto(func() dal.Record {
return dal.NewRecordWithIncompleteKey(models.CitiesCollection, reflect.String, &models.City{})
})
err = db.RunReadonlyTransaction(ctx, func(ctx context.Context, tx dal.ReadTransaction) error {
records, err = tx.QueryAllRecords(ctx, q)
return err
})
return
}
func testQueryOperations(ctx context.Context, t *testing.T, db dal.DB, eventuallyConsistent bool) {
defer func() { // Cleanup after test
if err := deleteAllCities(ctx, db); err != nil {
t.Fatalf("unexpected error while deleting test data: %v", err)
}
}()
if err := setupDataForQueryTests(ctx, db); err != nil {
t.Fatalf("unexpected error while setting up test data: %v", err)
}
if eventuallyConsistent { // This is to work around eventual consistency
time.Sleep(1 * time.Second)
if _, err := selectAllCities(ctx, db); err != nil {
t.Fatalf("unexpected error while loading all cities: %v", err)
}
}
var newCityRecord = func() dal.Record {
return dal.NewRecordWithIncompleteKey(models.CitiesCollection, reflect.String, &models.City{})
}
t.Run(`SELECT ID FROM Cities`, func(t *testing.T) {
qb := dal.From(models.CitiesCollection)
t.Run("no_limit", func(t *testing.T) {
q := qb.SelectKeysOnly(reflect.String)
if q == nil {
t.Fatalf("query is nil")
}
err := db.RunReadonlyTransaction(ctx, func(ctx context.Context, tx dal.ReadTransaction) error {
reader, err := tx.QueryReader(ctx, q)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if reader == nil {
t.Fatalf("reader is nil")
}
var ids []string
if ids, err = dal.SelectAllIDs[string](reader, dal.WithLimit(q.Limit())); err != nil {
t.Fatalf("unexpected error: %v", err)
}
expectedIDs := models.SortedCityIDs
assert.Equal(t, expectedIDs, ids)
return nil
})
assert.Nil(t, err)
})
t.Run("limit=3", func(t *testing.T) {
q := qb.Limit(3).SelectKeysOnly(reflect.String)
err := db.RunReadonlyTransaction(ctx, func(ctx context.Context, tx dal.ReadTransaction) error {
reader, err := tx.QueryReader(ctx, q)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
var ids []string
if ids, err = dal.SelectAllIDs[string](reader, dal.WithLimit(q.Limit())); err != nil {
t.Fatalf("unexpected error: %v", err)
}
assert.Equal(t, q.Limit(), len(ids))
expectedIDs := models.SortedCityIDs[:q.Limit()]
sort.Strings(ids)
assert.Equal(t, expectedIDs, ids)
return nil
})
assert.Nil(t, err)
})
})
t.Run(`SELECT * FROM Cities`, func(t *testing.T) {
qb := dal.From(models.CitiesCollection)
t.Run("no_limit", func(t *testing.T) {
query2 := qb.SelectInto(newCityRecord)
err := db.RunReadwriteTransaction(ctx, func(ctx context.Context, tx dal.ReadwriteTransaction) error {
records, err := tx.QueryAllRecords(ctx, query2)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
assert.Equal(t, len(models.Cities), len(records))
return nil
})
assert.Nil(t, err)
})
t.Run("limit=3", func(t *testing.T) {
q := qb.Limit(3).SelectInto(newCityRecord)
err := db.RunReadwriteTransaction(ctx, func(ctx context.Context, tx dal.ReadwriteTransaction) error {
records, err := tx.QueryAllRecords(ctx, q)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
assert.Equal(t, q.Limit(), len(records))
return nil
})
assert.Nil(t, err)
})
})
t.Run("SELECT ID FROM Cities ORDER BY Population", func(t *testing.T) {
qb := dal.From(models.CitiesCollection)
t.Run("ascending", func(t *testing.T) {
q := qb.
OrderBy(dal.AscendingField("Population")).
Limit(3).
SelectKeysOnly(reflect.String)
reader, err := db.QueryReader(ctx, q)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
var ids []string
if ids, err = dal.SelectAllIDs[string](reader, dal.WithLimit(q.Limit())); err != nil {
t.Fatalf("unexpected error: %v", err)
}
expectedIDs := []string{
dal.EscapeID("Istanbul_Istanbul"),
dal.EscapeID("Sindh_Karachi"),
dal.EscapeID("Dhaka_Dhaka"),
}
assert.Equal(t, expectedIDs, ids)
})
t.Run("descending", func(t *testing.T) {
q := qb.
OrderBy(dal.DescendingField("Population")).
Limit(3).
SelectKeysOnly(reflect.String)
reader, err := db.QueryReader(ctx, q)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
var ids []string
if ids, err = dal.SelectAllIDs[string](reader, dal.WithLimit(q.Limit())); err != nil {
t.Fatalf("unexpected error: %v", err)
}
expectedIDs := []string{
dal.EscapeID("Tokyo_Tokyo"),
dal.EscapeID("Delhi_Delhi"),
dal.EscapeID("Shanghai_Shanghai"),
}
assert.Equal(t, expectedIDs, ids)
})
})
t.Run("SELECT ID FROM Cities WHERE Country = 'IN'", func(t *testing.T) {
qb := dal.From(models.CitiesCollection)
t.Run("no_limit", func(t *testing.T) {
q := qb.WhereField("Country", dal.Equal, "IN").SelectKeysOnly(reflect.String)
reader, err := db.QueryReader(ctx, q)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
var ids []string
if ids, err = dal.SelectAllIDs[string](reader, dal.WithLimit(q.Limit())); err != nil {
t.Fatalf("unexpected error: %v", err)
}
sort.Strings(ids)
expectedIDs := []string{
dal.EscapeID("Delhi_Delhi"),
dal.EscapeID("Maharashtra_Mumbai"),
}
assert.Equal(t, expectedIDs, ids)
})
})
}
func deleteAllCities(ctx context.Context, db dal.DB) (err error) {
err = db.RunReadwriteTransaction(ctx, func(ctx context.Context, tx dal.ReadwriteTransaction) error {
q := dal.From(models.CitiesCollection).Limit(1000).SelectKeysOnly(reflect.String)
var reader dal.Reader
var err error
if reader, err = db.QueryReader(ctx, q); err != nil {
return fmt.Errorf("failed to query all cities: %w", err)
}
var ids []string
if ids, err = dal.SelectAllIDs[string](reader, dal.WithLimit(q.Limit())); err != nil {
return fmt.Errorf("failed to query all cities: %w", err)
}
keys := make([]*dal.Key, len(ids))
for i, id := range ids {
keys[i] = dal.NewKeyWithID(models.CitiesCollection, id)
}
if len(ids) == 0 {
return nil
}
return tx.DeleteMulti(ctx, keys)
})
if err != nil {
return fmt.Errorf("failed to delete all cities: %w", err)
}
return nil
}
func setupDataForQueryTests(ctx context.Context, db dal.DB) (err error) {
if err := deleteAllCities(ctx, db); err != nil {
return err
}
return db.RunReadwriteTransaction(ctx, func(ctx context.Context, tx dal.ReadwriteTransaction) error {
records := make([]dal.Record, len(models.Cities))
for i := range models.Cities { // Do not use value `for _, city` variable as all record will have same pointer to last city
records[i] = dal.NewRecordWithData(
dal.NewKeyWithID(models.CitiesCollection, models.CityID(models.Cities[i])),
&models.Cities[i],
)
}
return tx.SetMulti(ctx, records)
})
}