Add test for subclass of Properties as field

Author: Mechite

blackbox-test/src/main/java/org/example/customer/properties/MyProperties.java

@@ -0,0 +1,5 @@
+package org.example.customer.properties;
+
+import java.util.Properties;
+
+public class MyProperties extends Properties {}

blackbox-test/src/main/java/org/example/customer/properties/PropsSub.java

@@ -0,0 +1,8 @@
+package org.example.customer.properties;
+
+import io.avaje.jsonb.Json;
+
+import java.util.Properties;
+
+@Json
+public record PropsSub(MyProperties props) {}

blackbox-test/src/test/java/org/example/customer/properties/PropsTest.java

@@ -13,6 +13,7 @@ class PropsTest {
 
   Jsonb jsonb = Jsonb.builder().build();
   JsonType<Props> jsonType = jsonb.type(Props.class);
+  JsonType<PropsSub> jsonTypeSub = jsonb.type(PropsSub.class);
 
   @Test
   void toJson_fromJson() {
@@ -27,4 +28,17 @@ void toJson_fromJson() {
 
     assertThat(fromJson.props()).containsEntry("hi", "hey");
   }
+
+  @Test
+  void toJson_fromJson_subclass() {
+    MyProperties properties = new MyProperties();
+
+    properties.setProperty("hi", "hey");
+    PropsSub props = new PropsSub(properties);
+
+    String asJson = jsonTypeSub.toJson(props);
+    PropsSub fromJson = jsonTypeSub.fromJson(asJson);
+
+    assertThat(fromJson.props()).containsEntry("hi", "hey");
+  }
 }

jsonb/src/main/java/io/avaje/jsonb/core/CoreAdapters.java

@@ -6,10 +6,7 @@
 import io.avaje.jsonb.Jsonb;
 
 import java.lang.reflect.Type;
-import java.util.Collection;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
+import java.util.*;
 
 final class CoreAdapters {