Respect encoded name for examples (#4551)

fix #4540

.chronus/changes/fix-examples-encoded-name-2024-8-26-12-52-20.md

@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@typespec/compiler"
+---
+
+Json serialization of example respect `@encodedName`

packages/compiler/src/lib/examples.ts

@@ -10,7 +10,7 @@ import {
   type Type,
   type Value,
 } from "../core/types.js";
-import { getEncode, type EncodeData } from "./decorators.js";
+import { getEncode, resolveEncodedName, type EncodeData } from "./decorators.js";
 
 /**
  * Serialize the given TypeSpec value as a JSON object using the given type and its encoding annotations.
@@ -99,7 +99,11 @@ function serializeObjectValueAsJson(
   for (const propValue of value.properties.values()) {
     const definition = getPropertyOfType(type, propValue.name);
     if (definition) {
-      obj[propValue.name] = serializeValueAsJson(program, propValue.value, definition);
+      const name =
+        definition.kind === "ModelProperty"
+          ? resolveEncodedName(program, definition, "application/json")
+          : propValue.name;
+      obj[name] = serializeValueAsJson(program, propValue.value, definition);
     }
   }
   return obj;

packages/compiler/test/decorators/examples.test.ts

@@ -255,6 +255,20 @@ describe("json serialization of examples", () => {
     return serializeValueAsJson(program, examples[0].value, target);
   }
 
+  it("respect json encodedName", async () => {
+    const result = await getJsonValueOfExample(`
+      @example(#{
+        expireIn: 1
+      })
+      @test model test {
+        @encodedName("application/json", "exp")
+        expireIn: int32
+      }
+    `);
+
+    expect(result).toEqual({ exp: 1 });
+  });
+
   describe("scalar encoding", () => {
     const allCases: [
       string,