add smoke test

Author: zeitlinger

smoke-tests/src/test/groovy/io/opentelemetry/smoketest/DeclarativeConfigurationSmokeTest.groovy

@@ -48,7 +48,11 @@ class DeclarativeConfigurationSmokeTest extends SmokeTest {
     Collection<ExportTraceServiceRequest> traces = waitForTraces()
 
     then: "There is one trace"
-    traces.size() > 0
+    traces.size() == 1
+
+    then: "There is one span (io.opentelemetry.opentelemetry-instrumentation-annotations-1.16 " +
+        "is not used, because instrumentation_mode=none)"
+    getSpanStream(traces).count() == 1
 
     then: "explicitly set attribute is present"
     hasResourceAttribute(traces, "service.name", "declarative-config-smoke-test")

smoke-tests/src/test/resources/declarative-config.yaml

@@ -19,3 +19,10 @@ resource:
   attributes:
     - name: service.name
       value: declarative-config-smoke-test
+
+instrumentation/development:
+  java:
+    agent:
+      instrumentation_mode: none
+    tomcat:
+      enabled: true