Added support for multipart with content type, fixes gh-599

samples/standalone/dsl/http-server/src/main/java/com/example/fraud/TestController.java

@@ -0,0 +1,36 @@
+package com.example.fraud;
+
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestPart;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+@RestController
+public class TestController {
+
+    @PostMapping("/tests")
+    public Test createNew(@RequestPart MultipartFile file1,
+                          @RequestPart MultipartFile file2,
+                          @RequestPart Test test) {
+        return new Test("ok");
+    }
+}
+
+class Test {
+    private String status;
+
+    public Test(String status) {
+        this.status = status;
+    }
+
+    public Test() {
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+}

samples/standalone/dsl/http-server/src/test/java/com/example/fraud/MultipartBase.java

@@ -0,0 +1,14 @@
+package com.example.fraud;
+
+import com.example.fraud.TestController;
+import io.restassured.module.mockmvc.RestAssuredMockMvc;
+import org.junit.Before;
+import org.junit.runner.RunWith;
+
+public class MultipartBase {
+
+    @Before
+    public void setUp() throws Exception {
+        RestAssuredMockMvc.standaloneSetup(new TestController());
+    }
+}

samples/standalone/dsl/http-server/src/test/resources/contracts/multipart/shouldWorkForMultipartWithContentType.groovy

@@ -0,0 +1,35 @@
+import org.springframework.cloud.contract.spec.Contract
+
+Contract.make {
+	request {
+		method 'POST'
+		url '/tests'
+		multipart(
+				[
+						file1: named(
+								name: value(consumer(regex(nonEmpty())), producer('filename1')),
+								content: value(consumer(regex(nonEmpty())), producer('content1'))),
+						file2: named(
+								name: value(consumer(regex(nonEmpty())), producer('filename1')),
+								content: value(c(regex(nonEmpty())), producer('content2'))),
+						test : named(
+								name: value(consumer(regex(nonEmpty())), producer('filename1')),
+								content: value(c(regex(nonEmpty())), producer(file("test.json"))),
+								contentType: "application/json")
+				]
+		)
+
+		headers {
+			contentType('multipart/form-data')
+		}
+	}
+	response {
+		status 200
+		body([
+				status: 'ok'
+		])
+		headers {
+			contentType('application/json')
+		}
+	}
+}

samples/standalone/dsl/http-server/src/test/resources/contracts/multipart/test.json

@@ -0,0 +1,3 @@
+{
+  "status": "test"
+}