feat: move service_util to separated package

test/e2e/framework/service/affinity_checker.go

@@ -0,0 +1,56 @@
+/*
+Copyright 2019 The Kubernetes 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 service
+
+import (
+	e2elog "k8s.io/kubernetes/test/e2e/framework/log"
+)
+
+// affinityTracker tracks the destination of a request for the affinity tests.
+type affinityTracker struct {
+	hostTrace []string
+}
+
+// Record the response going to a given host.
+func (at *affinityTracker) recordHost(host string) {
+	at.hostTrace = append(at.hostTrace, host)
+	e2elog.Logf("Received response from host: %s", host)
+}
+
+// Check that we got a constant count requests going to the same host.
+func (at *affinityTracker) checkHostTrace(count int) (fulfilled, affinityHolds bool) {
+	fulfilled = (len(at.hostTrace) >= count)
+	if len(at.hostTrace) == 0 {
+		return fulfilled, true
+	}
+	last := at.hostTrace[0:]
+	if len(at.hostTrace)-count >= 0 {
+		last = at.hostTrace[len(at.hostTrace)-count:]
+	}
+	host := at.hostTrace[len(at.hostTrace)-1]
+	for _, h := range last {
+		if h != host {
+			return fulfilled, false
+		}
+	}
+	return fulfilled, true
+}
+
+func checkAffinityFailed(tracker affinityTracker, err string) {
+	e2elog.Logf("%v", tracker.hostTrace)
+	e2elog.Failf(err)
+}