How to validate response in one attempt - rest-assured

Question

I want to test the response for POST request to petstore.swagger.io. I receive a response, why cannot I validate the body with path "id"? I always got errors, but regex is right and tested.
Test method:
#Test
public void postPet() {
Pattern pt = Pattern.compile("<(\\d*)>");
Response response = given()
.contentType("application/json")
.body(jsonObject)
.when()
.post(String.format("https://petstore.swagger.io/v2/pet"))
.then()
.statusCode(200)
.log().body()
.and()
.assertThat()
.body("id", matchesPattern(pt))
Error:
java.lang.AssertionError: 1 expectation failed.
JSON path id doesn't match.
Expected: a string matching the pattern '<(\d*)>'
Actual: <9223372000666122518L>
The response body is:
{
"id": 9223372000666122443,
"category": {
"id": 0,
"name": "string"
},
"name": "doggie",
"photoUrls": [
"string"
],
"tags": [
{
"id": 0,
"name": "string"
}
],
"status": "available"
}
And what is the L at the end of the id string? In swagger, there is no L as well as in the Postman. I tried regex without "< , >".

Answer 1

It's kind of clear that
your id is 9223372000666122518L, L means long (data type)
you use regex, but it only works for String
--> type mistmach when comparing long vs String
Solution:
Convert id to String first then assert
long id = ...log().body()
.extract().path("id");
assertThat(String.valueOf(id), Matchers.matchesPattern("\\d+"));
or
Write a custom Matcher, to check isLong, like this Is there a way in Hamcrest to test for a value to be a number?