/
testutils.go
50 lines (43 loc) · 1.58 KB
/
testutils.go
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package database
import (
"context"
"math/rand"
"time"
"unsafe"
core_logging "github.com/BlackspaceInc/BlackspacePlatform/src/libraries/core/core-logging/json"
core_metrics "github.com/BlackspaceInc/BlackspacePlatform/src/libraries/core/core-metrics"
core_tracing "github.com/BlackspaceInc/BlackspacePlatform/src/libraries/core/core-tracing"
)
var src = rand.NewSource(time.Now().UnixNano())
const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
const (
letterIdxBits = 6 // 6 bits to represent a letter index
letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
)
func GenerateRandomString(n int) string {
b := make([]byte, n)
// A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
if remain == 0 {
cache, remain = src.Int63(), letterIdxMax
}
if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
b[i] = letterBytes[idx]
i--
}
cache >>= letterIdxBits
remain--
}
return *(*string)(unsafe.Pointer(&b))
}
// Setup sets up database connection prior to testing
func Setup(ctx context.Context, connectionString string, tracingEngine *core_tracing.TracingEngine, metricsEngine *core_metrics.CoreMetricsEngine,
logger core_logging.ILog, svcEndpoint string) *Db {
// initialize connection to the database
db, err := New(ctx, connectionString, tracingEngine, metricsEngine, logger, svcEndpoint)
if err != nil {
return nil
}
return db
}