added unit test for ingest synthetic

pkg/pipeline/ingest/ingest_synthetic_test.go

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2023 IBM, Inc.
+ *
+ * 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 ingest
+
+import (
+	"testing"
+
+	"github.com/netobserv/flowlogs-pipeline/pkg/api"
+	"github.com/netobserv/flowlogs-pipeline/pkg/config"
+	"github.com/stretchr/testify/require"
+)
+
+func TestIngestSynthetic(t *testing.T) {
+	batchMaxLen := 3
+	connections := 20
+	flowLogsPerMin := 1000
+	synthetic := api.IngestSynthetic{
+		BatchMaxLen:    batchMaxLen,
+		Connections:    connections,
+		FlowLogsPerMin: flowLogsPerMin,
+	}
+	params := config.StageParam{
+		Ingest: &config.Ingest{
+			Type:      "synthetic",
+			Synthetic: &synthetic,
+		},
+	}
+	ingest, err := NewIngestSynthetic(params)
+	syn := ingest.(*IngestSynthetic)
+	require.NoError(t, err)
+	require.Equal(t, batchMaxLen, syn.params.BatchMaxLen)
+	require.Equal(t, connections, syn.params.Connections)
+	require.Equal(t, flowLogsPerMin, syn.params.FlowLogsPerMin)
+
+	// run the Ingest method in a separate thread
+	ingestOutput := make(chan config.GenericMap)
+	go syn.Ingest(ingestOutput)
+
+	type connection struct {
+		srcAddr  string
+		dstAddr  string
+		srcPort  int
+		dstPort  int
+		protocol int
+	}
+
+	// Start collecting flows from the ingester and ensure we have the specified number of distinct connections
+	connectionMap := make(map[connection]int)
+	for i := 0; i < (3 * connections); i++ {
+		flowEntry := <-ingestOutput
+		conn := connection{
+			srcAddr:  flowEntry["SrcAddr"].(string),
+			dstAddr:  flowEntry["DstAddr"].(string),
+			srcPort:  flowEntry["SrcPort"].(int),
+			dstPort:  flowEntry["DstPort"].(int),
+			protocol: flowEntry["Proto"].(int),
+		}
+		connectionMap[conn]++
+	}
+	require.Equal(t, connections, len(connectionMap))
+}