From 78ad3920c5f4bb07fedad5614a60b8ca18baf3a1 Mon Sep 17 00:00:00 2001
From: mperor <mpietryga93@gmail.com>
Date: Thu, 6 Mar 2025 22:45:41 +0100
Subject: [PATCH] Jackson tester example

---
 spring-web-lab/README.md                      |  3 +-
 .../src/main/resources/application.yml        |  6 ++-
 .../lab/spring/jackson/JacksonTest.java       | 47 +++++++++++++++++++
 3 files changed, 54 insertions(+), 2 deletions(-)
 create mode 100644 spring-web-lab/src/test/java/pl/mperor/lab/spring/jackson/JacksonTest.java

diff --git a/spring-web-lab/README.md b/spring-web-lab/README.md
index 45022aa..e57bce6 100644
--- a/spring-web-lab/README.md
+++ b/spring-web-lab/README.md
@@ -2,4 +2,5 @@
 
 ## Sources 🔗
 
-* [Java Senior Quiz 🧩](https://youtube.com/playlist?list=PLO5muTI694A5yRrEDNY1czqEUVbYHG_AH&si=KteWFowVcOSTQ8F-)
\ No newline at end of file
+* [Java Senior Quiz 🧩](https://youtube.com/playlist?list=PLO5muTI694A5yRrEDNY1czqEUVbYHG_AH&si=KteWFowVcOSTQ8F-)
+* [Action Jackson! Effective JSON processing in Spring Boot Applications by Joris Kuipers @ Spring I/O](https://youtu.be/BhiF6e24l5k?si=IxS0X6FtgfWzdP-c)
\ No newline at end of file
diff --git a/spring-web-lab/src/main/resources/application.yml b/spring-web-lab/src/main/resources/application.yml
index ec0d75f..b6c381d 100644
--- a/spring-web-lab/src/main/resources/application.yml
+++ b/spring-web-lab/src/main/resources/application.yml
@@ -6,4 +6,8 @@
 
 #logging:
 #  level:
-#    org.springframework.boot.actuate: DEBUG
\ No newline at end of file
+#    org.springframework.boot.actuate: DEBUG
+
+#spring:
+#  jackson:
+#    default-property-inclusion: NON_NULL
\ No newline at end of file
diff --git a/spring-web-lab/src/test/java/pl/mperor/lab/spring/jackson/JacksonTest.java b/spring-web-lab/src/test/java/pl/mperor/lab/spring/jackson/JacksonTest.java
new file mode 100644
index 0000000..7fdc321
--- /dev/null
+++ b/spring-web-lab/src/test/java/pl/mperor/lab/spring/jackson/JacksonTest.java
@@ -0,0 +1,47 @@
+package pl.mperor.lab.spring.jackson;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.json.JsonTest;
+import org.springframework.boot.test.json.JacksonTester;
+import org.springframework.boot.test.json.JsonContent;
+
+import java.io.IOException;
+import java.util.Map;
+
+@JsonTest
+public class JacksonTest {
+
+    @Autowired
+    private JacksonTester<Sample> sampleTester;
+    @Autowired
+    private JacksonTester<Map<String, Sample>> wrappedTester;
+
+    record Sample(int integer, String string) {}
+
+    @Test
+    void testSampleMarshalling() throws IOException {
+        var sample = new Sample(1, "Text");
+        JsonContent<Sample> content = sampleTester.write(sample);
+        Assertions.assertThat(content).isEqualToJson("""
+                {
+                    "integer" : 1,
+                    "string" : "Text"
+                }
+                """
+        );
+
+        var wrapped = Map.of("sample", sample);
+        Assertions.assertThat(wrappedTester.write(wrapped)).isEqualToJson("""
+                {
+                    "sample" : {
+                       "integer" : 1,
+                        "string" : "Text"
+                    }
+                }
+                """
+        );
+    }
+
+}