Cannot deserialize out of start_array token - arrays

Question

This is my method for POST test
public void createParagraph3() {
RestAssured.baseURI = paragraphsURL;
Map<String, Object> map = new HashMap<String, Object>();
map.put("featurePackage", Arrays.asList(new HashMap<String, String>() {{
put("name", "Test");
put("inputText", "test test");
}}));
map.put("features", Arrays.asList(new HashMap<String, Object>() {{
put("featureType", "Feature");
put("inUse", "true");
put("name", "test xyxy");
}}));
map.put("type", Arrays.asList(new HashMap<String, String>() {{
put("key", "int");
put("name", "Introduction");
}}));
RequestSpecification request = RestAssured.given();
request.header("Content-Type", "application/json");
request.body(map).toString();
Response response = request.post();
int statusCode = response.getStatusCode();
System.out.println("Response body: " + response.body().asString());
System.out.println("Status code received: " + statusCode);
}
Below I have my request on basis I'm creating my test
{
"featurePackage": {
"features": [
{
"featureType": "string",
"id": 0,
"inUse": true,
"name": "string"
}
],
"id": 0,
"name": "string",
"objectCount": 0
},
"features": [
{
"featureType": "string",
"id": 0,
"inUse": true,
"name": "string"
}
],
"id": 0,
"inputText": "string",
"objectCount": 0,
"outputHtmlText": "string",
"sourceFileName": "string",
"type": {
"key": "string",
"name": "string"
}
}
What I am doing wrong? I still received 400 response "Cannot deserialize instance". Can someone help? I have incomplete request in my method?

Answer 1

EDIT 1:
The root cause is that map.toString() is not a valid JSON string.
There are two ways for you to solve this problem:
use JSONObject instead of map, see this
convert map to JSON object, see this
PS: A demo about map.toString()
Map<String, Integer> map = new HashMap<>();
map.put("apple", 1);
map.put("banana", 2);
System.out.println(map.toString());
// get: {apple=1, banana=2} is NOT a valid JSON String
// but, {"apple":1,"banana":2} is a valid JSON String
EDIT 2:
Since the owner of question added some comments, I have to add the following answer.
Pom.xml
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.10.0</version>
</dependency>
Java code:
// your comment
Map<String, Object> titles = new HashMap<>();
titles.put("titles", Arrays.asList(new HashMap<String, Object>() {
{
put("id", "876");
put("title", "test");
}
}));
System.out.println(titles);
// my new answer
import com.fasterxml.jackson.databind.ObjectMapper;
ObjectMapper mapper = new ObjectMapper();
String json = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(titles);
System.out.println(json);