Passing body in restassured using Generics doesn't work for File and FileInputStream - rest-assured

Question

In Restassured we can pass the request payload in the body method by different ways like
String
POJO Object
Map Object
JsonObject (from GSON library)
File and
FileInputStream
So, I created following one method using generics to accommodate all these types: -
public <T> Response postAMember(T body) {
return given().spec(this.spec).body(body).when().post(EndPoints.GET_ALL_POST_A_MEMBER).andReturn();
}
Now, this is how I'm consuming it for respective Type (Not all in one go...one at a time): -
#Test
public void postMember() throws IOException {
// Using Hashmap
Map<String, String> body = new HashMap<>();
body.put("name", "Rocky");
body.put("gender", "Male");
// Using Model and GSON
Member imember = new Member("Rocky", "Male");
Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();
String body = gson.toJson(imember);
// Using JsonObject (GSON)
JsonObject body = new JsonObject();
body.addProperty("name", "Rocky");
body.addProperty("gender", "Male");
// Using Payload JSON File
File body = new File("src/test/resources/Payloads/postmemberpayload.json");
// Using Raw String
String body = "{\r\n" +
" \"name\": \"Rocky\",\r\n" +
" \"gender\": \"Male\"\r\n" +
"}";
// Using FileInputStream
FileInputStream fis = new FileInputStream(body); // in this case I would pass fis to body method
Response resp = MemberService.getMemberServiceInstance().postAMember(body);
Assert.assertEquals(resp.getStatusCode(), StatusCode.CREATED_201);
Member omember = resp.getBody().as(Member.class);
System.out.println(omember.toString());
}
postAMember method works fine only with : -
String
POJO Object
Map Object
JsonObject (from GSON library)
But fails with remaining two: -
File - Output is bad request 400
FileInputStream - Output is java.lang.IllegalArgumentException: jdk.internal.ref.PhantomCleanable<?> declares multiple JSON fields named next
And for now I've to make following two more overloaded version of postAMember: -
public Response postAMember(File body) {
return given().spec(this.spec).body(body).when().post(EndPoints.GET_ALL_POST_A_MEMBER).andReturn();
}
public Response postAMember(FileInputStream body) {
return given().spec(this.spec).body(body).when().post(EndPoints.GET_ALL_POST_A_MEMBER).andReturn();
}
Now above two methods generate the response. Any clue what's wrong here? Why the method with generics is not able to take File and FileInputStream?
I've fetched the latest Restassured libraries from maven central repo.

Answer 1

As far as I understand, your generics method will map to body(Object object) of RequestSpecification, then this object will be serialized.
class RequestSpecificationImpl
...
RequestSpecification body(Object object) {
...
this.requestBody = ObjectMapping.serialize(object, requestContentType,
findEncoderCharsetOrReturnDefault(requestContentType), null,
objectMappingConfig(), restAssuredConfig().getEncoderConfig());
...
}
All below kinds of object has no problem with serialization.
String
POJO Object
Map Object
JsonObject (from GSON library)
But
File ---serialize---> full path of FILE
FileInputStream ---serialize---> exception (from Gson/Jackson)
When you add 2 methods, then Rest-Assured correctly map to body(File body) and body(InputStream body) --> no serialization for them --> no issue.