fix: unit test: TestSDKInjection/Resource_attribute_propagate (#3207)

Author: chinaran

pkg/instrumentation/sdk_test.go

@@ -596,6 +596,14 @@ func TestSDKInjection(t *testing.T) {
 									Name:  "OTEL_TRACES_SAMPLER",
 									Value: "always_on",
 								},
+								{
+									Name: "OTEL_RESOURCE_ATTRIBUTES_POD_NAME",
+									ValueFrom: &corev1.EnvVarSource{
+										FieldRef: &corev1.ObjectFieldSelector{
+											FieldPath: "metadata.name",
+										},
+									},
+								},
 								{
 									Name: "OTEL_RESOURCE_ATTRIBUTES_NODE_NAME",
 									ValueFrom: &corev1.EnvVarSource{
@@ -606,7 +614,7 @@ func TestSDKInjection(t *testing.T) {
 								},
 								{
 									Name:  "OTEL_RESOURCE_ATTRIBUTES",
-									Value: "foo=bar,k8s.container.name=other,service.version=explicitly_set,foo=test,fromcr=val,fromtest=val,k8s.namespace.name=project1,k8s.node.name=$(OTEL_RESOURCE_ATTRIBUTES_NODE_NAME),k8s.pod.name=app",
+									Value: "foo=bar,k8s.container.name=other,service.version=explicitly_set,foo=test,fromcr=val,fromtest=val,k8s.namespace.name=project1,k8s.node.name=$(OTEL_RESOURCE_ATTRIBUTES_NODE_NAME),k8s.pod.name=$(OTEL_RESOURCE_ATTRIBUTES_POD_NAME)",
 								},
 							},
 						},