functional-tester/tester: initial commit

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

tools/functional-tester/tester/utils.go

@@ -0,0 +1,79 @@
+// Copyright 2018 The etcd 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 tester
+
+import (
+	"fmt"
+	"math/rand"
+	"net"
+	"net/url"
+	"strings"
+)
+
+func isValidURL(u string) bool {
+	_, err := url.Parse(u)
+	return err == nil
+}
+
+func getPort(addr string) (port string, err error) {
+	urlAddr, err := url.Parse(addr)
+	if err != nil {
+		return "", err
+	}
+	_, port, err = net.SplitHostPort(urlAddr.Host)
+	if err != nil {
+		return "", err
+	}
+	return port, nil
+}
+
+func getSameValue(vals map[string]int64) bool {
+	var rv int64
+	for _, v := range vals {
+		if rv == 0 {
+			rv = v
+		}
+		if rv != v {
+			return false
+		}
+	}
+	return true
+}
+
+func max(n1, n2 int64) int64 {
+	if n1 > n2 {
+		return n1
+	}
+	return n2
+}
+
+func errsToError(errs []error) error {
+	if len(errs) == 0 {
+		return nil
+	}
+	stringArr := make([]string, len(errs))
+	for i, err := range errs {
+		stringArr[i] = err.Error()
+	}
+	return fmt.Errorf(strings.Join(stringArr, ", "))
+}
+
+func randBytes(size int) []byte {
+	data := make([]byte, size)
+	for i := 0; i < size; i++ {
+		data[i] = byte(int('a') + rand.Intn(26))
+	}
+	return data
+}