From 3aabd07eac27f7c5f16334890626320634c33889 Mon Sep 17 00:00:00 2001
From: kliushnichenko <v.kliushnychenko@gmail.com>
Date: Tue, 2 Apr 2024 19:14:15 +0300
Subject: [PATCH] closes https://github.com/jooby-project/jooby/issues/3400

---
 .../java/io/jooby/internal/RouterImpl.java    |  3 +-
 .../test/java/io/jooby/i3400/Issue3400.java   | 39 +++++++++++++++++++
 tests/src/test/java/io/jooby/i3400/Pet.java   | 27 +++++++++++++
 3 files changed, 67 insertions(+), 2 deletions(-)
 create mode 100644 tests/src/test/java/io/jooby/i3400/Issue3400.java
 create mode 100644 tests/src/test/java/io/jooby/i3400/Pet.java

diff --git a/jooby/src/main/java/io/jooby/internal/RouterImpl.java b/jooby/src/main/java/io/jooby/internal/RouterImpl.java
index fba5ac1d39..c2e3704ca3 100644
--- a/jooby/src/main/java/io/jooby/internal/RouterImpl.java
+++ b/jooby/src/main/java/io/jooby/internal/RouterImpl.java
@@ -908,8 +908,7 @@ private void copy(Route src, Route it) {
     it.setExecutorKey(src.getExecutorKey());
     it.setTags(src.getTags());
     it.setDescription(src.getDescription());
-    it.setDecoders(src.getDecoders());
-    it.setMvcMethod(it.getMvcMethod());
+    it.setMvcMethod(src.getMvcMethod());
     it.setNonBlocking(src.isNonBlocking());
     it.setSummary(src.getSummary());
   }
diff --git a/tests/src/test/java/io/jooby/i3400/Issue3400.java b/tests/src/test/java/io/jooby/i3400/Issue3400.java
new file mode 100644
index 0000000000..bc944a6606
--- /dev/null
+++ b/tests/src/test/java/io/jooby/i3400/Issue3400.java
@@ -0,0 +1,39 @@
+package io.jooby.i3400;
+
+import io.jooby.Jooby;
+import io.jooby.jackson.JacksonModule;
+import io.jooby.junit.ServerTest;
+import io.jooby.junit.ServerTestRunner;
+import okhttp3.MediaType;
+import okhttp3.RequestBody;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class Issue3400 {
+
+  static class AppA extends Jooby {
+    {
+        post("/pets", ctx -> ctx.body(Pet.class));
+    }
+  }
+
+  @ServerTest
+  public void shouldShareDecodersOnMountedResources(ServerTestRunner runner) {
+    runner
+        .define(
+            app -> {
+              app.install(new JacksonModule());
+              app.mount(new AppA());
+            })
+        .ready(
+            http -> {
+                http.post(
+                "/pets",
+                  RequestBody.create("{\"id\": 1, \"name\": \"Cheddar\"}", MediaType.parse("application/json")),
+                  rsp -> {
+                    assertEquals("{\"id\":1,\"name\":\"Cheddar\"}", rsp.body().string());
+                    assertEquals("application/json;charset=UTF-8", rsp.header("Content-Type"));
+                  });
+            });
+  }
+}
diff --git a/tests/src/test/java/io/jooby/i3400/Pet.java b/tests/src/test/java/io/jooby/i3400/Pet.java
new file mode 100644
index 0000000000..0aca6c76c8
--- /dev/null
+++ b/tests/src/test/java/io/jooby/i3400/Pet.java
@@ -0,0 +1,27 @@
+package io.jooby.i3400;
+
+class Pet {
+    private int id;
+    private String name;
+
+    public Pet(int id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}