 
 class MultipartFormDataParametersTests: XCTestCase {
     func testMultipartFormDataSuccess() {
-        for capacity in [1, 255, Int(UInt16.max)] {
-            let value1 = "1".dataUsingEncoding(NSUTF8StringEncoding)!
-            let value2 = "2".dataUsingEncoding(NSUTF8StringEncoding)!
+        let value1 = "1".dataUsingEncoding(NSUTF8StringEncoding)!
+        let value2 = "2".dataUsingEncoding(NSUTF8StringEncoding)!
 
-            let parameters = MultipartFormDataBodyParameters(parts: [
-                MultipartFormDataBodyParameters.Part(data: value1, name: "foo"),
-                MultipartFormDataBodyParameters.Part(data: value2, name: "bar"),
-            ])
+        let parameters = MultipartFormDataBodyParameters(parts: [
+            MultipartFormDataBodyParameters.Part(data: value1, name: "foo"),
+            MultipartFormDataBodyParameters.Part(data: value2, name: "bar"),
+        ])
 
-            do {
-                guard case .InputStream(let inputStream) = try parameters.buildEntity() else {
-                    XCTFail()
-                    return
-                }
+        do {
+            guard case .Data(let data) = try parameters.buildEntity() else {
+                XCTFail()
+                return
+            }
 
-                let data = try! NSData(inputStream: inputStream, capacity: capacity)
-                let encodedData = String(data: data, encoding:NSUTF8StringEncoding)!
-                let returnCode = "\r\n"
+            let encodedData = String(data: data, encoding:NSUTF8StringEncoding)!
+            let returnCode = "\r\n"
 
-                let pattern = "^multipart/form-data; boundary=([\\w.]+)$"
-                let regexp = try NSRegularExpression(pattern: pattern, options: [])
-                let range = NSRange(location: 0, length: parameters.contentType.characters.count)
-                let match = regexp.matchesInString(parameters.contentType, options: [], range: range)
-                XCTAssertTrue(match.count > 0)
+            let pattern = "^multipart/form-data; boundary=([\\w.]+)$"
+            let regexp = try NSRegularExpression(pattern: pattern, options: [])
+            let range = NSRange(location: 0, length: parameters.contentType.characters.count)
+            let match = regexp.matchesInString(parameters.contentType, options: [], range: range)
+            XCTAssertTrue(match.count > 0)
 
-                let boundary = (parameters.contentType as NSString).substringWithRange(match.first!.rangeAtIndex(1))
-                XCTAssertEqual(parameters.contentType, "multipart/form-data; boundary=\(boundary)")
-                XCTAssertEqual(encodedData, "--\(boundary)\(returnCode)Content-Disposition: form-data; name=\"foo\"\(returnCode)\(returnCode)1\(returnCode)--\(boundary)\(returnCode)Content-Disposition: form-data; name=\"bar\"\(returnCode)\(returnCode)2\(returnCode)--\(boundary)--\(returnCode)")
-            } catch {
-                XCTFail()
-            }
+            let boundary = (parameters.contentType as NSString).substringWithRange(match.first!.rangeAtIndex(1))
+            XCTAssertEqual(parameters.contentType, "multipart/form-data; boundary=\(boundary)")
+            XCTAssertEqual(encodedData, "--\(boundary)\(returnCode)Content-Disposition: form-data; name=\"foo\"\(returnCode)\(returnCode)1\(returnCode)--\(boundary)\(returnCode)Content-Disposition: form-data; name=\"bar\"\(returnCode)\(returnCode)2\(returnCode)--\(boundary)--\(returnCode)")
+        } catch {
+            XCTFail()
         }
     }
 

        let parameters = MultipartFormDataBodyParameters(parts: [part])

        do {
            guard case .InputStream(let inputStream) = try parameters.buildEntity() else {
                XCTFail()
                return
            }

            let data = try! NSData(inputStream: inputStream, capacity: 64)
            let string = String(data: data, encoding:NSUTF8StringEncoding)!
            XCTAssertEqual(string, "--\(parameters.boundary)\r\nContent-Disposition: form-data; name=\"foo\"\r\n\r\n3.14\r\n--\(parameters.boundary)--\r\n")
        } catch {

        let parameters = MultipartFormDataBodyParameters(parts: [part])

        do {
            guard case .Data(let data) = try parameters.buildEntity() else {
                XCTFail()
                return
            }

            let string = String(data: data, encoding:NSUTF8StringEncoding)!
            XCTAssertEqual(string, "--\(parameters.boundary)\r\nContent-Disposition: form-data; name=\"foo\"\r\n\r\nabcdef\r\n--\(parameters.boundary)--\r\n")
        } catch {
