Add support for documenting the parts of a multipart request

Closes gh-161

docs/src/test/java/com/example/mockmvc/RequestParts.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2014-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.mockmvc;
+
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.springframework.restdocs.mockmvc.MockMvcRestDocumentation.document;
+import static org.springframework.restdocs.request.RequestDocumentation.partWithName;
+import static org.springframework.restdocs.request.RequestDocumentation.requestParts;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.fileUpload;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+public class RequestParts {
+
+	private MockMvc mockMvc;
+
+	public void upload() throws Exception {
+		// tag::request-parts[]
+		this.mockMvc.perform(fileUpload("/upload").file("file", "example".getBytes())) // <1>
+			.andExpect(status().isOk())
+			.andDo(document("upload", requestParts( // <2>
+					partWithName("file").description("The file to upload")) // <3>
+		));
+		// end::request-parts[]
+	}
+
+}

docs/src/test/java/com/example/restassured/RequestParts.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2014-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.restassured;
+
+import com.jayway.restassured.RestAssured;
+import com.jayway.restassured.specification.RequestSpecification;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.springframework.restdocs.request.RequestDocumentation.partWithName;
+import static org.springframework.restdocs.request.RequestDocumentation.requestParts;
+import static org.springframework.restdocs.restassured.RestAssuredRestDocumentation.document;
+
+public class RequestParts {
+
+	private RequestSpecification spec;
+
+	public void upload() throws Exception {
+		// tag::request-parts[]
+		RestAssured.given(this.spec)
+			.filter(document("users", requestParts( // <1>
+					partWithName("file").description("The file to upload")))) // <2>
+			.multiPart("file", "example") // <3>
+			.when().post("/upload") // <4>
+			.then().statusCode(is(200));
+		// end::request-parts[]
+	}
+
+}