test_utils.go

// Copyright 2023 The PromiseDB Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package bmdb

import (
	"fmt"
	"math/rand"
	"testing"
	"time"
)

const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"

func GetTestBytes(i int) []byte {
	return []byte(fmt.Sprintf("bmdb-%09d", i))
}

func GetRandomBytes(length int) []byte {
	b := make([]byte, length)
	for i := range b {
		b[i] = charset[rand.Intn(len(charset))]
	}
	return b
}

// waitFor polls the provided check function until it returns true or the
// timeout elapses. It fails the test if the timeout is reached.
func waitFor(t *testing.T, check func() bool, timeout time.Duration) {
	deadline := time.Now().Add(timeout)
	for {
		if check() {
			return
		}
		if time.Now().After(deadline) {
			t.Fatalf("condition not met within %v", timeout)
		}
		time.Sleep(10 * time.Millisecond)
	}
}