#45 - Add test for Json Alias annotation

Author: rbygrave

blackbox-test/src/main/java/org/example/customer/alias/WithAlias.java

@@ -0,0 +1,8 @@
+package org.example.customer.alias;
+
+import io.avaje.jsonb.Json;
+
+@Json
+public record WithAlias(int id, @Json.JsonAlias({"something", "something2"}) String alias, String message) {
+
+}

blackbox-test/src/test/java/org/example/customer/alias/WithAliasTest.java

@@ -0,0 +1,26 @@
+package org.example.customer.alias;
+
+import io.avaje.jsonb.JsonType;
+import io.avaje.jsonb.Jsonb;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class WithAliasTest {
+  Jsonb jsonb = Jsonb.builder().build();
+
+  @Test
+  void toJsonFromJson() {
+    var bean = new WithAlias(42, "foo", "bar");
+    String asJson = jsonb.toJson(bean);
+    assertThat(asJson).isEqualTo("{\"id\":42,\"alias\":\"foo\",\"message\":\"bar\"}");
+
+    JsonType<WithAlias> type = jsonb.type(WithAlias.class);
+    WithAlias fromJson = type.fromJson(asJson);
+
+    assertThat(fromJson).isEqualTo(bean);
+    assertThat(type.fromJson("{\"id\":42,\"something\":\"foo\",\"message\":\"bar\"}")).isEqualTo(bean);
+    assertThat(type.fromJson("{\"id\":42,\"something2\":\"foo\",\"message\":\"bar\"}")).isEqualTo(bean);
+    assertThat(type.fromJson("{\"id\":42,\"alias\":\"foo\",\"message\":\"bar\"}")).isEqualTo(bean);
+  }
+}

jsonb-generator/src/main/java/io/avaje/jsonb/generator/FieldReader.java

@@ -304,15 +304,12 @@ void writeFromJsonSwitch(Append writer, boolean defaultConstructor, String varNa
     if (unmapped) {
       return;
     }
-
     if (aliases != null) {
-
       for (final String alias : aliases) {
         writer.append("        case \"%s\":", alias);
         writer.eol();
       }
     }
-
     writer.append("        case \"%s\": {", propertyName).eol();
     if (!deserialize) {
       writer.append("          reader.skipValue();");