Fix CI Visibility Manual API to not fail when there is no tracer injected

dd-trace-api/build.gradle

@@ -19,6 +19,10 @@ excludedClassesCoverage += [
   'datadog.trace.api.internal.TraceSegment.NoOp',
   'datadog.trace.api.civisibility.CIVisibility',
   'datadog.trace.api.civisibility.DDTestModule',
+  'datadog.trace.api.civisibility.noop.NoOpDDTest',
+  'datadog.trace.api.civisibility.noop.NoOpDDTestModule',
+  'datadog.trace.api.civisibility.noop.NoOpDDTestSession',
+  'datadog.trace.api.civisibility.noop.NoOpDDTestSuite',
   'datadog.trace.api.config.ProfilingConfig',
   'datadog.trace.api.interceptor.MutableSpan',
   'datadog.trace.api.profiling.Profiling',

dd-trace-api/src/main/java/datadog/trace/api/civisibility/CIVisibility.java

@@ -1,16 +1,14 @@
 package datadog.trace.api.civisibility;
 
+import datadog.trace.api.civisibility.noop.NoOpDDTestSession;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import javax.annotation.Nullable;
 
 public class CIVisibility {
 
   private static volatile SessionFactory SESSION_FACTORY =
-      (projectName, projectRoot, component, startTime) -> {
-        throw new UnsupportedOperationException(
-            "session factory not registered, please ensure CI Visibility feature is enabled");
-      };
+      (projectName, projectRoot, component, startTime) -> NoOpDDTestSession.INSTANCE;
 
   /**
    * This a hook for injecting SessionFactory implementation. It should only be used internally by

dd-trace-api/src/main/java/datadog/trace/api/civisibility/noop/NoOpDDTest.java

@@ -0,0 +1,20 @@
+package datadog.trace.api.civisibility.noop;
+
+import datadog.trace.api.civisibility.DDTest;
+import javax.annotation.Nullable;
+
+public class NoOpDDTest implements DDTest {
+  static final DDTest INSTANCE = new NoOpDDTest();
+
+  @Override
+  public void setTag(String key, Object value) {}
+
+  @Override
+  public void setErrorInfo(@Nullable Throwable error) {}
+
+  @Override
+  public void setSkipReason(@Nullable String skipReason) {}
+
+  @Override
+  public void end(@Nullable Long endTime) {}
+}

dd-trace-api/src/main/java/datadog/trace/api/civisibility/noop/NoOpDDTestModule.java

@@ -0,0 +1,30 @@
+package datadog.trace.api.civisibility.noop;
+
+import datadog.trace.api.civisibility.DDTestModule;
+import datadog.trace.api.civisibility.DDTestSuite;
+import javax.annotation.Nullable;
+
+public class NoOpDDTestModule implements DDTestModule {
+  static final DDTestModule INSTANCE = new NoOpDDTestModule();
+
+  @Override
+  public void setTag(String key, Object value) {}
+
+  @Override
+  public void setErrorInfo(Throwable error) {}
+
+  @Override
+  public void setSkipReason(String skipReason) {}
+
+  @Override
+  public void end(@Nullable Long endTime) {}
+
+  @Override
+  public DDTestSuite testSuiteStart(
+      String testSuiteName,
+      @Nullable Class<?> testClass,
+      @Nullable Long startTime,
+      boolean parallelized) {
+    return NoOpDDTestSuite.INSTANCE;
+  }
+}

dd-trace-api/src/main/java/datadog/trace/api/civisibility/noop/NoOpDDTestSession.java

@@ -0,0 +1,26 @@
+package datadog.trace.api.civisibility.noop;
+
+import datadog.trace.api.civisibility.DDTestModule;
+import datadog.trace.api.civisibility.DDTestSession;
+import javax.annotation.Nullable;
+
+public class NoOpDDTestSession implements DDTestSession {
+  public static final DDTestSession INSTANCE = new NoOpDDTestSession();
+
+  @Override
+  public void setTag(String key, Object value) {}
+
+  @Override
+  public void setErrorInfo(Throwable error) {}
+
+  @Override
+  public void setSkipReason(String skipReason) {}
+
+  @Override
+  public void end(@Nullable Long endTime) {}
+
+  @Override
+  public DDTestModule testModuleStart(String moduleName, @Nullable Long startTime) {
+    return NoOpDDTestModule.INSTANCE;
+  }
+}

dd-trace-api/src/main/java/datadog/trace/api/civisibility/noop/NoOpDDTestSuite.java

@@ -0,0 +1,27 @@
+package datadog.trace.api.civisibility.noop;
+
+import datadog.trace.api.civisibility.DDTest;
+import datadog.trace.api.civisibility.DDTestSuite;
+import java.lang.reflect.Method;
+import javax.annotation.Nullable;
+
+public class NoOpDDTestSuite implements DDTestSuite {
+  static final DDTestSuite INSTANCE = new NoOpDDTestSuite();
+
+  @Override
+  public void setTag(String key, Object value) {}
+
+  @Override
+  public void setErrorInfo(Throwable error) {}
+
+  @Override
+  public void setSkipReason(String skipReason) {}
+
+  @Override
+  public void end(@Nullable Long endTime) {}
+
+  @Override
+  public DDTest testStart(String testName, @Nullable Method testMethod, @Nullable Long startTime) {
+    return NoOpDDTest.INSTANCE;
+  }
+}