test: jsonbTransient tests on record

Co-authored-by-AI: IBM Bob (1.126.0+bob2.1.0)

src/test/java/org/eclipse/yasson/customization/transients/JsonbTransientTest.java

diff --git a/src/test/java/org/eclipse/yasson/customization/transients/JsonbTransientTest.java b/src/test/java/org/eclipse/yasson/customization/transients/JsonbTransientTest.java
index 5d2f053..c1d36a0 100644
--- a/src/test/java/org/eclipse/yasson/customization/transients/JsonbTransientTest.java
+++ b/src/test/java/org/eclipse/yasson/customization/transients/JsonbTransientTest.java
@@ -19,9 +19,6 @@
 
 import org.eclipse.yasson.customization.transients.models.*;
 import jakarta.json.bind.JsonbException;
-import jakarta.json.bind.Jsonb;
-import jakarta.json.bind.JsonbBuilder;
-import jakarta.json.bind.JsonbConfig;
 import jakarta.json.bind.annotation.JsonbTransient;
 
 /**
@@ -167,6 +164,57 @@
         assertEquals("{\"instance\":\"INSTANCE\"}", defaultJsonb.toJson(pojo));
     }
 
+    // -------------------------------------------------------------------------
+    // Record variants
+    // -------------------------------------------------------------------------
+
+    /**
+     * Serialization: verifies that {@link JsonbTransient} on a record component,
+     * on an accessor method, on both together, and on a virtual (non-component)
+     * accessor method each suppress the property from the JSON output, while an
+     * unannotated component remains visible.
+     */
+    @Test
+    public void testJsonbTransientRecordSerialize() {
+        JsonbTransientRecord record = new JsonbTransientRecord(
+                "non transient",
+                "component transient value",
+                "accessor transient value",
+                "component and accessor transient value"
+        );
+
+        assertEquals("{\"plainProperty\":\"non transient\"}", defaultJsonb.toJson(record));
+    }
+
+    /**
+     * Deserialization: verifies the correct transient semantics for records:
+     * <ul>
+     *   <li>{@link JsonbTransient} on a record <b>component</b> (backing field) suppresses
+     *       both serialization and deserialization — the JSON value is not bound.</li>
+     *   <li>{@link JsonbTransient} on the <b>accessor method</b> only suppresses serialization;
+     *       the component is still populated during deserialization because the accessor
+     *       annotation is the equivalent of a getter annotation on a regular class.</li>
+     *   <li>When present on both component and accessor, the component annotation governs
+     *       and the value is not bound.</li>
+     * </ul>
+     */
+    @Test
+    public void testJsonbTransientRecordDeserialize() {
+        JsonbTransientRecord result = defaultJsonb.fromJson(
+                "{\"plainProperty\":\"plainProperty value\"," +
+                "\"componentTransient\":\"component transient value\"," +
+                "\"accessorTransient\":\"accessor transient value\"," +
+                "\"componentAndAccessorTransient\":\"component and accessor transient value\"," +
+                "\"virtualAttributeTransient\":\"virtual transient value\"" +
+                "}",
+                JsonbTransientRecord.class);
+
+        assertEquals("plainProperty value", result.plainProperty());
+        assertNull(result.componentTransient());
+        assertEquals("accessor transient value", result.accessorTransient());
+        assertNull(result.componentAndAccessorTransient());
+    }
+
     @Test
     public void testTransientGetterNoField() {
         TransientGetterNoField pojo = new TransientGetterNoField();

src/test/java/org/eclipse/yasson/customization/transients/models/JsonbTransientRecord.java

diff --git a/src/test/java/org/eclipse/yasson/customization/transients/models/JsonbTransientRecord.java b/src/test/java/org/eclipse/yasson/customization/transients/models/JsonbTransientRecord.java
new file mode 100644
index 0000000..13f6b08
--- /dev/null
+++ b/src/test/java/org/eclipse/yasson/customization/transients/models/JsonbTransientRecord.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2026 Contributors to the Eclipse Foundation
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0,
+ * or the Eclipse Distribution License v. 1.0 which is available at
+ * http://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
+ */
+
+package org.eclipse.yasson.customization.transients.models;
+
+import jakarta.json.bind.annotation.JsonbTransient;
+
+/**
+ * Record variant of {@link JsonbTransientValue} for testing {@link JsonbTransient} on record
+ * components and record accessor methods.
+ *
+ * <ul>
+ *   <li>{@code plainProperty}          – not transient, always visible</li>
+ *   <li>{@code componentTransient}     – {@code @JsonbTransient} on the record component</li>
+ *   <li>{@code accessorTransient}      – {@code @JsonbTransient} on the accessor method</li>
+ *   <li>{@code componentAndAccessorTransient} – {@code @JsonbTransient} on both</li>
+ * </ul>
+ */
+public record JsonbTransientRecord(
+        String plainProperty,
+
+        @JsonbTransient
+        String componentTransient,
+
+        String accessorTransient,
+
+        @JsonbTransient
+        String componentAndAccessorTransient
+) {
+
+    /** Accessor annotated with {@link JsonbTransient} to suppress serialization. */
+    @JsonbTransient
+    @Override
+    public String accessorTransient() {
+        return accessorTransient;
+    }
+
+    /** Accessor annotated with {@link JsonbTransient} alongside the component annotation. */
+    @JsonbTransient
+    @Override
+    public String componentAndAccessorTransient() {
+        return componentAndAccessorTransient;
+    }
+
+    @JsonbTransient
+    public String virtualAttributeTransient() {
+        return "a string";
+    }
+}