use AnnotationFinder to determine alias name from @Produces

src/main/java/net/hostsharing/hsadminng/reflection/AnnotationFinder.java

@@ -0,0 +1,47 @@
+package net.hostsharing.hsadminng.reflection;
+
+import lombok.experimental.UtilityClass;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Method;
+import java.util.Optional;
+
+import static java.util.Optional.empty;
+
+@UtilityClass
+public class AnnotationFinder {
+
+    public static <T extends Annotation> Optional<T> findCallerAnnotation(
+            final Class<T> annotationClassToFind,
+            final Class<? extends Annotation> annotationClassToStopLookup
+    ) {
+        for (var element : Thread.currentThread().getStackTrace()) {
+            try {
+                final var clazz = Class.forName(element.getClassName());
+                final var method = getMethodFromStackElement(clazz, element);
+
+                // Check if the method is annotated with the desired annotation
+                if (method != null) {
+                    if (method.isAnnotationPresent(annotationClassToFind)) {
+                        return Optional.of(method.getAnnotation(annotationClassToFind));
+                    } else if (method.isAnnotationPresent(annotationClassToStopLookup)) {
+                        return empty();
+                    }
+                }
+            } catch (final ClassNotFoundException | NoSuchMethodException e) {
+                throw new RuntimeException(e); // FIXME: when does this happen?
+            }
+        }
+        return empty();
+    }
+
+    private static Method getMethodFromStackElement(Class<?> clazz, StackTraceElement element)
+            throws NoSuchMethodException {
+        for (var method : clazz.getDeclaredMethods()) {
+            if (method.getName().equals(element.getMethodName())) {
+                return method;
+            }
+        }
+        return null;
+    }
+}

src/test/java/net/hostsharing/hsadminng/hs/office/usecases/HsOfficeUseCasesTest.java

@@ -30,7 +30,7 @@ class HsOfficeUseCasesTest extends UseCaseTest {
     @Order(1010)
     @Produces(explicitly = "Partner: Test AG", implicitly = "Person: Test AG")
     void shouldCreatePartner() {
-        new CreatePartner(this, "Partner: Test AG")
+        new CreatePartner(this)
                 .given("partnerNumber", 31010)
                 .given("personType", "LEGAL_PERSON")
                 .given("tradeName", "Test AG")
@@ -73,7 +73,7 @@ class HsOfficeUseCasesTest extends UseCaseTest {
     @Requires("Person: Test AG")
     @Produces("Debitor: Billing GmbH")
     void shouldCreateExternalDebitorForPartner() {
-        new CreateExternalDebitorForPartner(this, "Debitor: Billing GmbH")
+        new CreateExternalDebitorForPartner(this)
                 .given("partnerPersonUuid", "%{Person: Test AG}")
                 .given("billingContactCaption", "Billing GmbH - billing department")
                 .given("billingContactEmailAddress", "billing@test-ag.example.org")
@@ -103,7 +103,7 @@ class HsOfficeUseCasesTest extends UseCaseTest {
     @Requires("Debitor: Test AG - main debitor")
     @Produces("SEPA-Mandate: Test AG")
     void shouldCreateSepaMandateForDebitor() {
-        new CreateSepaMandataForDebitor(this, "SEPA-Mandate: Test AG")
+        new CreateSepaMandataForDebitor(this)
                 .given("debitor", "Test AG")
                 .given("memberNumberSuffix", "00")
                 .given("validFrom", "2024-10-15")

src/test/java/net/hostsharing/hsadminng/hs/office/usecases/UseCase.java

@@ -4,7 +4,11 @@ import io.restassured.RestAssured;
 import io.restassured.http.ContentType;
 import io.restassured.response.Response;
 import io.restassured.response.ValidatableResponse;
+import net.hostsharing.hsadminng.reflection.AnnotationFinder;
 import org.apache.commons.collections4.map.LinkedMap;
+import org.hibernate.AssertionFailure;
+import org.jetbrains.annotations.Nullable;
+import org.junit.jupiter.api.Test;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.HttpStatus;
 
@@ -16,6 +20,8 @@ import java.util.function.Supplier;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.hamcrest.Matchers.startsWith;
+import static org.junit.platform.commons.util.StringUtils.isBlank;
+import static org.junit.platform.commons.util.StringUtils.isNotBlank;
 
 public abstract class UseCase<T extends UseCase<?>> {
 
@@ -26,7 +32,7 @@ public abstract class UseCase<T extends UseCase<?>> {
     private String nextTitle; // FIXME: ugly
 
     public UseCase(final UseCaseTest testSuite) {
-        this(testSuite, null);
+        this(testSuite, getResultAliasFromProducesAnnotationInCallStack());
     }
 
     public UseCase(final UseCaseTest testSuite, final String resultAlias) {
@@ -189,4 +195,19 @@ public abstract class UseCase<T extends UseCase<?>> {
         //noinspection unchecked
         return (T) this;
     }
+
+    private static @Nullable String getResultAliasFromProducesAnnotationInCallStack() {
+        return AnnotationFinder.findCallerAnnotation(Produces.class, Test.class)
+                .map(produces -> oneOf(produces.value(), produces.explicitly()))
+                .orElse(null);
+    }
+
+    private static String oneOf(final String one, final String another) {
+        if (isNotBlank(one) && isBlank(another)) {
+            return one;
+        } else if ( isBlank(one) && isNotBlank(another)) {
+            return another;
+        }
+        throw new AssertionFailure("exactly one value required, but got '" + one + "' and '" + another + "'");
+    }
 }

src/test/java/net/hostsharing/hsadminng/hs/office/usecases/UseCaseTest.java

@@ -8,7 +8,6 @@ import net.hostsharing.hsadminng.lambda.Reducer;
 import net.hostsharing.hsadminng.rbac.context.ContextBasedTest;
 import net.hostsharing.hsadminng.rbac.test.JpaAttempt;
 import org.apache.commons.collections4.SetUtils;
-import org.hibernate.AssertionFailure;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Order;
@@ -148,15 +147,6 @@ public abstract class UseCaseTest extends ContextBasedTest {
         return all;
     }
 
-    private String oneOf(final String one, final String another) {
-        if (one != null && another == null) {
-            return one;
-        } else if (one == null && another != null) {
-            return another;
-        }
-        throw new AssertionFailure("excactly one value required");
-    }
-
     static boolean containsAlias(final String alias) {
         return aliases.containsKey(alias);
     }
@@ -177,10 +167,6 @@ public abstract class UseCaseTest extends ContextBasedTest {
         properties.put(name, (value instanceof String string) ? resolve(string) : value);
     }
 
-    static LinkedHashMap<String, Object> properties() {
-        return new LinkedHashMap<>(properties);
-    }
-
     static Map<String, Object> knowVariables() {
         final var map = new LinkedHashMap<String, Object>();
         UseCaseTest.aliases.forEach((key, value) -> map.put(key, value.uuid()));

src/test/java/net/hostsharing/hsadminng/hs/office/usecases/debitor/CreateExternalDebitorForPartner.java

@@ -9,8 +9,8 @@ import static org.springframework.http.HttpStatus.CREATED;
 
 public class CreateExternalDebitorForPartner extends UseCase<CreateExternalDebitorForPartner> {
 
-    public CreateExternalDebitorForPartner(final UseCaseTest testSuite, final String resultAlias) {
-        super(testSuite, resultAlias);
+    public CreateExternalDebitorForPartner(final UseCaseTest testSuite) {
+        super(testSuite);
 
         requires("Person: Billing GmbH", alias -> new CreatePerson(testSuite, alias)
                 .given("personType", "LEGAL_PERSON")

src/test/java/net/hostsharing/hsadminng/hs/office/usecases/debitor/CreateSepaMandataForDebitor.java

@@ -8,8 +8,8 @@ import static org.springframework.http.HttpStatus.CREATED;
 
 public class CreateSepaMandataForDebitor extends UseCase<CreateSepaMandataForDebitor> {
 
-    public CreateSepaMandataForDebitor(final UseCaseTest testSuite, final String resultAlias) {
-        super(testSuite, resultAlias);
+    public CreateSepaMandataForDebitor(final UseCaseTest testSuite) {
+        super(testSuite);
     }
 
     @Override

src/test/java/net/hostsharing/hsadminng/hs/office/usecases/partner/CreatePartner.java

@@ -11,6 +11,10 @@ public class CreatePartner extends UseCase<CreatePartner> {
         super(testSuite, resultAlias);
     }
 
+    public CreatePartner(final UseCaseTest testSuite) {
+        super(testSuite);
+    }
+
     @Override
     protected HttpResponse run() {