Fix deprecated Maven testing API compatibility

impl/maven-testing/src/main/java/org/apache/maven/api/plugin/testing/stubs/ProducedArtifactStub.java

@@ -20,4 +20,11 @@
 
 /** @deprecated Use {@link org.apache.maven.testing.plugin.stubs.ProducedArtifactStub} instead */
 @Deprecated(since = "4.0.0-rc-6", forRemoval = true)
-public class ProducedArtifactStub extends org.apache.maven.testing.plugin.stubs.ProducedArtifactStub {}
+public class ProducedArtifactStub extends org.apache.maven.testing.plugin.stubs.ProducedArtifactStub {
+    public ProducedArtifactStub() {}
+
+    public ProducedArtifactStub(
+            String groupId, String artifactId, String classifier, String version, String extension) {
+        super(groupId, artifactId, classifier, version, extension);
+    }
+}

impl/maven-testing/src/main/java/org/apache/maven/testing/plugin/MojoExtension.java

@@ -315,9 +315,10 @@ public void beforeEach(ExtensionContext context) throws Exception {
 
         String pluginBasedir = MavenDIExtension.getBasedir();
 
-        String basedir = AnnotationSupport.findAnnotation(context.getElement().orElseThrow(), Basedir.class)
-                .map(Basedir::value)
-                .orElse(pluginBasedir);
+        String basedir = findBasedirValue(context.getElement().orElseThrow());
+        if (basedir == null) {
+            basedir = pluginBasedir;
+        }
         if (basedir.isEmpty()) {
             basedir = pluginBasedir + "/target/tests/"
                     + context.getRequiredTestClass().getSimpleName() + "/"
@@ -746,6 +747,18 @@ public static void setVariableValueToObject(Object object, String variable, Obje
         field.set(object, value);
     }
 
+    @SuppressWarnings("deprecation")
+    private static String findBasedirValue(AnnotatedElement element) {
+        Basedir a = AnnotationSupport.findAnnotation(element, Basedir.class).orElse(null);
+        if (a != null) {
+            return a.value();
+        }
+        org.apache.maven.api.plugin.testing.Basedir d = AnnotationSupport.findAnnotation(
+                        element, org.apache.maven.api.plugin.testing.Basedir.class)
+                .orElse(null);
+        return d != null ? d.value() : null;
+    }
+
     @SuppressWarnings("deprecation")
     private static String[] findInjectMojoAttrs(AnnotatedElement element) {
         InjectMojo a = element.getAnnotation(InjectMojo.class);

impl/maven-testing/src/test/java/org/apache/maven/api/plugin/testing/ExpressionEvaluatorTest.java

@@ -40,6 +40,7 @@
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.doReturn;
 
@@ -99,6 +100,17 @@ public void testParams(ExpressionEvaluatorMojo mojo) {
         assertDoesNotThrow(mojo::execute);
     }
 
+    @Test
+    @SuppressWarnings("removal")
+    @org.apache.maven.api.plugin.testing.InjectMojo(goal = COORDINATES, pom = CONFIG)
+    @org.apache.maven.api.plugin.testing.Basedir("${basedir}/target/test-classes")
+    @org.apache.maven.api.plugin.testing.MojoParameter(name = "param", value = "deprecatedParamValue")
+    public void testDeprecatedAnnotations(ExpressionEvaluatorMojo mojo) throws IllegalAccessException {
+        assertTrue(Paths.get(MojoExtension.getBasedir()).endsWith(Paths.get("target", "test-classes")));
+        assertEquals("deprecatedParamValue", MojoExtension.getVariableValueFromObject(mojo, "param"));
+        assertDoesNotThrow(mojo::execute);
+    }
+
     @Mojo(name = "goal")
     @Named("test:test-plugin:0.0.1-SNAPSHOT:goal") // this one is usually generated by maven-plugin-plugin
     public static class ExpressionEvaluatorMojo implements org.apache.maven.api.plugin.Mojo {

impl/maven-testing/src/test/java/org/apache/maven/api/plugin/testing/stubs/ProducedArtifactStubTest.java

@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.maven.api.plugin.testing.stubs;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class ProducedArtifactStubTest {
+
+    @Test
+    @SuppressWarnings("removal")
+    void deprecatedConstructorRemainsSourceCompatible() {
+        ProducedArtifactStub artifact = new ProducedArtifactStub("group", "artifact", "tests", "1.0", "jar");
+
+        assertEquals("group", artifact.getGroupId());
+        assertEquals("artifact", artifact.getArtifactId());
+        assertEquals("tests", artifact.getClassifier());
+        assertEquals("1.0", artifact.getVersion().toString());
+        assertEquals("jar", artifact.getExtension());
+    }
+}