fix TestBeatsReceiverProcessRuntimeFallback

Author: swiatekm

testing/integration/ess/beat_receivers_test.go

@@ -819,7 +819,7 @@ agent.monitoring.enabled: false
 
 // Log lines TestBeatsReceiverProcessRuntimeFallback checks for
 const (
-	otelRuntimeUnsupportedLogLineStart                 = "otel runtime is not supported"
+	otelRuntimeUnsupportedLogLineStart                 = "otel runtime is not supported for component"
 	otelRuntimeMonitoringOutputUnsupportedLogLineStart = "otel runtime is not supported for monitoring output"
 	prometheusInputSkippedLogLine                      = "The Otel prometheus metrics monitoring input can't run in a beats process, skipping"
 )
@@ -842,19 +842,29 @@ func TestBeatsReceiverProcessRuntimeFallback(t *testing.T) {
 	config := `agent.logging.to_stderr: true
 agent.logging.to_files: false
 inputs:
-  # Collecting system metrics
   - type: system/metrics
     id: unique-system-metrics-input
     _runtime_experimental: otel
     streams:
       - metricsets:
         - cpu
+  - type: system/metrics
+    id: unique-system-metrics-input-2
+    use_output: supported
+    _runtime_experimental: otel
+    streams:
+      - metricsets:
+        - cpu
 outputs:
   default:
     type: elasticsearch
     hosts: [http://localhost:9200]
     api_key: placeholder
     indices: [] # not supported by the elasticsearch exporter
+  supported:
+    type: elasticsearch
+    hosts: [http://localhost:9200]
+    api_key: placeholder
 `
 
 	// this is the context for the whole test, with a global timeout defined
@@ -917,7 +927,7 @@ outputs:
 		}
 	})
 
-	assert.Len(t, unsupportedLogRecords, 5, "one log line for each component we try to run")
+	assert.Len(t, unsupportedLogRecords, 1, "one log line for each component we try to run")
 	assert.NotEmpty(t, prometheusUnsupportedLogRecord, "should get a log line about Otel prometheus metrics input being skipped")
 	assert.NotEmpty(t, monitoringOutputUnsupportedLogRecord, "should get a log line about monitoring output not being supported")
 }