add blackbox test

Author: SentryMan

blackbox-test/src/main/java/org/example/customer/mixin/CrewMate.java

@@ -0,0 +1,28 @@
+package org.example.customer.mixin;
+
+public class CrewMate {
+
+  private String c;
+  private Integer susLv;
+
+  public CrewMate(String c, Integer susLv) {
+    this.c = c;
+    this.susLv = susLv;
+  }
+
+  public String getC() {
+    return c;
+  }
+
+  public void setC(String c) {
+    this.c = c;
+  }
+
+  public Integer getSusLv() {
+    return susLv;
+  }
+
+  public void setSusLv(Integer susLv) {
+    this.susLv = susLv;
+  }
+}

blackbox-test/src/main/java/org/example/customer/mixin/CrewMateMixIn.java

@@ -0,0 +1,14 @@
+package org.example.customer.mixin;
+
+import io.avaje.jsonb.Json;
+
+@Json.Import(CrewMate.class)
+@Json.MixIn(CrewMate.class)
+public abstract class CrewMateMixIn {
+
+  @Json.Property("color")
+  private String c;
+
+  @Json.Ignore(deserialize = true)
+  private int susLv;
+}

blackbox-test/src/test/java/org/example/customer/mixin/MixinTest.java

@@ -0,0 +1,24 @@
+package org.example.customer.mixin;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Test;
+
+import io.avaje.jsonb.Jsonb;
+
+class MixinTest {
+
+  Jsonb jsonb = Jsonb.builder().build();
+
+  @Test
+  void toJsonFromJson() {
+    final var bean = new CrewMate("red", 999);
+
+    final var asJson = jsonb.toJson(bean);
+    assertThat(asJson).isEqualTo("{\"color\":\"red\"}");
+
+    final var fromJson = jsonb.type(CrewMate.class).fromJson("{\"color\":\"blue\",\"susLv\":\"0\"}");
+    assertThat(fromJson.getC()).isEqualTo("blue");
+    assertThat(fromJson.getSusLv()).isZero();
+  }
+}