- add integration test for onResponseBody

tests/core/snapshots/test-on-response-body.md_0.snap

@@ -0,0 +1,17 @@
+---
+source: tests/core/spec.rs
+expression: response
+---
+{
+  "status": 200,
+  "headers": {
+    "content-type": "application/json"
+  },
+  "body": {
+    "data": {
+      "hello": {
+        "name": "Leanne Graham - Changed by JS"
+      }
+    }
+  }
+}

tests/core/snapshots/test-on-response-body.md_client.snap

@@ -0,0 +1,52 @@
+---
+source: tests/core/spec.rs
+expression: formatted
+---
+scalar Bytes
+
+scalar Date
+
+scalar DateTime
+
+scalar Email
+
+scalar Empty
+
+scalar Int128
+
+scalar Int16
+
+scalar Int32
+
+scalar Int64
+
+scalar Int8
+
+scalar JSON
+
+scalar PhoneNumber
+
+type Query {
+  hello: User!
+}
+
+scalar UInt128
+
+scalar UInt16
+
+scalar UInt32
+
+scalar UInt64
+
+scalar UInt8
+
+scalar Url
+
+type User {
+  id: Int!
+  name: String!
+}
+
+schema {
+  query: Query
+}

tests/core/snapshots/test-on-response-body.md_merged.snap

@@ -0,0 +1,16 @@
+---
+source: tests/core/spec.rs
+expression: formatter
+---
+schema @server @upstream(baseURL: "https://jsonplaceholder.typicode.com") @link(src: "test.js", type: Script) {
+  query: Query
+}
+
+type Query {
+  hello: User! @http(path: "/users/1", onResponseBody: "onResponse")
+}
+
+type User {
+  id: Int!
+  name: String!
+}

tests/execution/test-on-response-body.md

@@ -0,0 +1,43 @@
+# Js Customize the Response with onResponseBody.
+
+```js @file:test.js
+function onResponse({response}) {
+    let body = JSON.parse(response.body);
+    body.name = body.name + " - Changed by JS";
+    response.body = JSON.stringify(body);
+    return {response};
+}
+```
+
+```graphql @config
+schema @server @upstream(baseURL: "https://jsonplaceholder.typicode.com") @link(type: Script, src: "test.js") {
+  query: Query
+}
+
+type Query {
+  hello: User! @http(path: "/users/1", onResponseBody: "onResponse")
+}
+
+type User {
+  id: Int!
+  name: String!
+}
+```
+
+```yml @mock
+- request:
+    method: GET
+    url: https://jsonplaceholder.typicode.com/users/1
+  response:
+    status: 200
+    body:
+      id: 1
+      name: Leanne Graham
+```
+
+```yml @test
+- method: POST
+  url: http://localhost:8080/graphql
+  body:
+    query: query { hello { name } }
+```