Add test with custom Jackson JsonFactory

Author: rbygrave

jsonb-jackson/src/test/java/io/avaje/jsonb/jackson/JacksonAdapterTest.java

@@ -0,0 +1,70 @@
+package io.avaje.jsonb.jackson;
+
+import com.fasterxml.jackson.core.JsonFactory;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.SerializableString;
+import com.fasterxml.jackson.core.io.CharacterEscapes;
+import io.avaje.jsonb.Jsonb;
+import org.example.Address;
+import org.example.MyComponent;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class JacksonAdapterTest {
+
+  public static final JsonFactory JSON_FACTORY = new JsonFactory()
+    .configure(JsonParser.Feature.ALLOW_COMMENTS, true)
+    .configure(JsonParser.Feature.ALLOW_YAML_COMMENTS, true)
+    .configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS, true) // required to read line breaks
+    .configure(JsonParser.Feature.ALLOW_TRAILING_COMMA, true);
+
+  public static final JsonFactory HUMAN_READABLE_JSON_FACTORY = JSON_FACTORY.copy()
+    .setCharacterEscapes(new HumanReadableCharacterEscapes());
+
+  @Test
+  void custom_JsonFactory() {
+
+    JacksonAdapter jacksonAdapter = new JacksonAdapter(false, false, false, HUMAN_READABLE_JSON_FACTORY);
+
+    Jsonb jsonb = Jsonb.newBuilder()
+      .adapter(jacksonAdapter)
+      .add(new MyComponent())
+      .build();
+
+    String jc = "\n// a comment \n ## yaml-comment \n{\"street\":\"my-street\nwith-new-lines\tand-tabs\"}";
+
+    Address address = jsonb.type(Address.class).fromJson(jc);
+    assertThat(address.street()).isEqualTo("my-street\n" +
+      "with-new-lines\tand-tabs");
+
+    Address withHumanNewLinesEtc = new Address();
+    withHumanNewLinesEtc.street("my-street\nwith-new-lines\tand-tabs");
+
+    String asJson = jsonb.toJson(withHumanNewLinesEtc);
+    assertThat(asJson).isEqualTo("{\"street\":\"my-street\n" +
+      "with-new-lines\tand-tabs\"}");
+  }
+
+  private static class HumanReadableCharacterEscapes extends CharacterEscapes {
+    private static final long serialVersionUID = 1L;
+
+    private static final int[] asciiEscapes = CharacterEscapes.standardAsciiEscapesForJSON();
+    static {
+      asciiEscapes['\t'] = CharacterEscapes.ESCAPE_NONE;
+      asciiEscapes['\r'] = CharacterEscapes.ESCAPE_NONE;
+      asciiEscapes['\n'] = CharacterEscapes.ESCAPE_NONE;
+    }
+
+    @Override
+    public SerializableString getEscapeSequence(final int ch) {
+      return null;
+    }
+
+    @Override
+    public int[] getEscapeCodesForAscii() {
+      return asciiEscapes;
+    }
+  }
+
+}