Merge pull request #9938 from geoand/#9886

Fix deepClone issue with Supplier

Author: geoand

integration-tests/main/src/test/java/io/quarkus/it/main/ParameterResolverTest.java

@@ -3,6 +3,8 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import java.util.Arrays;
+import java.util.Collections;
+import java.util.function.Supplier;
 
 import javax.inject.Inject;
 
@@ -18,15 +20,19 @@
 
 @QuarkusTest
 @ExtendWith(ParameterResolverTest.UnusedBeanDummyInputResolver.class)
+@ExtendWith(ParameterResolverTest.SupplierParameterResolver.class)
 public class ParameterResolverTest {
 
     @Inject
     UnusedBean unusedBean;
 
     @Test
-    public void testParameterResolver(UnusedBean.DummyInput dummyInput) {
+    public void testParameterResolver(UnusedBean.DummyInput dummyInput, Supplier<UnusedBean.DummyInput> supplier) {
         UnusedBean.DummyResult dummyResult = unusedBean.dummy(dummyInput);
         assertEquals("whatever/6", dummyResult.getResult());
+
+        dummyResult = unusedBean.dummy(supplier.get());
+        assertEquals("fromSupplier/0", dummyResult.getResult());
     }
 
     public static class UnusedBeanDummyInputResolver implements ParameterResolver {
@@ -44,4 +50,20 @@ public Object resolveParameter(ParameterContext parameterContext,
         }
     }
 
+    public static class SupplierParameterResolver implements ParameterResolver {
+
+        @Override
+        public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext)
+                throws ParameterResolutionException {
+            return Supplier.class.getName().equals(parameterContext.getParameter().getType().getName());
+        }
+
+        @Override
+        public Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext)
+                throws ParameterResolutionException {
+            return (Supplier<UnusedBean.DummyInput>) () -> new UnusedBean.DummyInput("fromSupplier",
+                    new UnusedBean.NestedDummyInput(Collections.emptyList()));
+        }
+    }
+
 }

test-framework/junit5/src/main/java/io/quarkus/test/junit/internal/XStreamDeepClone.java

@@ -1,5 +1,7 @@
 package io.quarkus.test.junit.internal;
 
+import java.util.function.Supplier;
+
 import com.thoughtworks.xstream.XStream;
 
 /**
@@ -17,7 +19,33 @@ public XStreamDeepClone(ClassLoader classLoader) {
     }
 
     public Object clone(Object objectToClone) {
+        if (objectToClone == null) {
+            return null;
+        }
+
+        if (objectToClone instanceof Supplier) {
+            return handleSupplier((Supplier<?>) objectToClone);
+        }
+
+        return doClone(objectToClone);
+    }
+
+    private Supplier<Object> handleSupplier(final Supplier<?> supplier) {
+        return new Supplier<Object>() {
+            @Override
+            public Object get() {
+                return doClone(supplier.get());
+            }
+        };
+    }
+
+    private Object doClone(Object objectToClone) {
         final String serialized = xStream.toXML(objectToClone);
-        return xStream.fromXML(serialized);
+        final Object result = xStream.fromXML(serialized);
+        if (result == null) {
+            throw new IllegalStateException("Unable to deep clone object of type '" + objectToClone.getClass().getName()
+                    + "'. Please report the issue on the Quarkus issue tracker.");
+        }
+        return result;
     }
 }