[VOL-1644] Add test cases to the Core Utils package
As part of this update some utilities which were inside the flow
decomposer file has been moved to the utils package. Otherwise,
the code would have to be duplicated to work around package
circular dependencies.
Change-Id: I77dc6cdb23d832323e58ff6d9351db809fff30ba
diff --git a/rw_core/utils/core_utils_test.go b/rw_core/utils/core_utils_test.go
new file mode 100644
index 0000000..cb0abfe
--- /dev/null
+++ b/rw_core/utils/core_utils_test.go
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+ *
+ * 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 utils
+
+import (
+ "github.com/opencord/voltha-go/common/log"
+ "github.com/stretchr/testify/assert"
+ "google.golang.org/grpc/codes"
+ "google.golang.org/grpc/status"
+ "math/rand"
+ "testing"
+ "time"
+)
+
+var (
+ timeoutError error
+ taskFailureError error
+)
+
+func init() {
+ log.AddPackage(log.JSON, log.WarnLevel, nil)
+ timeoutError = status.Errorf(codes.Aborted, "timeout")
+ taskFailureError = status.Error(codes.Internal, "test failure task")
+}
+
+func runSuccessfulTask(ch chan interface{}, durationRange int) {
+ time.Sleep(time.Duration(rand.Intn(durationRange)) * time.Millisecond)
+ ch <- nil
+}
+
+func runFailureTask(ch chan interface{}, durationRange int) {
+ time.Sleep(time.Duration(rand.Intn(durationRange)) * time.Millisecond)
+ ch <- taskFailureError
+}
+
+func runMultipleTasks(timeout, numTasks, taskDurationRange, numSuccessfulTask, numFailuretask int) []error {
+ if numTasks != numSuccessfulTask+numFailuretask {
+ return []error{status.Error(codes.FailedPrecondition, "invalid-num-tasks")}
+ }
+ numSuccessfulTaskCreated := 0
+ chnls := make([]chan interface{}, numTasks)
+ for i := 0; i < numTasks; i++ {
+ chnls[i] = make(chan interface{})
+ if numSuccessfulTaskCreated < numSuccessfulTask {
+ go runSuccessfulTask(chnls[i], taskDurationRange)
+ numSuccessfulTaskCreated += 1
+ continue
+ }
+ go runFailureTask(chnls[i], taskDurationRange)
+ }
+ return WaitForNilOrErrorResponses(int64(timeout), chnls...)
+}
+
+func getNumSuccessFailure(inputs []error) (numSuccess, numFailure, numTimeout int) {
+ numFailure = 0
+ numSuccess = 0
+ numTimeout = 0
+ for _, input := range inputs {
+ if input != nil {
+ if input.Error() == timeoutError.Error() {
+ numTimeout += 1
+ }
+ numFailure += 1
+ } else {
+ numSuccess += 1
+ }
+ }
+ return
+}
+
+func TestNoTimeouts(t *testing.T) {
+ var (
+ totalSuccess int
+ totalFailure int
+ results []error
+ nSuccess int
+ nFailure int
+ nTimeouts int
+ )
+ numIterations := 5
+ numTasks := 5
+ for i := 0; i < numIterations; i++ {
+ totalSuccess = rand.Intn(numTasks)
+ totalFailure = numTasks - totalSuccess
+ results = runMultipleTasks(110, numTasks, 100, totalSuccess, totalFailure)
+ nSuccess, nFailure, nTimeouts = getNumSuccessFailure(results)
+ assert.Equal(t, totalFailure, nFailure)
+ assert.Equal(t, totalSuccess, nSuccess)
+ assert.Equal(t, 0, nTimeouts)
+
+ }
+}
+
+func TestSomeTasksTimeouts(t *testing.T) {
+ var (
+ totalSuccess int
+ totalFailure int
+ results []error
+ nSuccess int
+ nFailure int
+ nTimeouts int
+ )
+ numIterations := 5
+ numTasks := 5
+ for i := 0; i < numIterations; i++ {
+ totalSuccess = rand.Intn(numTasks)
+ totalFailure = numTasks - totalSuccess
+ results = runMultipleTasks(50, numTasks, 100, totalSuccess, totalFailure)
+ nSuccess, nFailure, nTimeouts = getNumSuccessFailure(results)
+ assert.True(t, nFailure >= totalFailure)
+ assert.True(t, nSuccess <= totalSuccess)
+ assert.True(t, nTimeouts > 0)
+ }
+}