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In REST Assured, how can I check if a field is present or not in the response?

How can I make sure that my response, let's say it is in JSON, either contains or does not contain a specific field?

when()
    .get("/person/12345")
.then()
    .body("surname", isPresent()) // Doesn't work...
    .body("age", isNotPresent()); // ...But that's the idea.

I'm looking for a way to assert whether my JSON will contain or not the fields age and surname.

over 4 years ago · Santiago Trujillo

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Answer 1 · 2022-06-13T15:17:00.791Z

You can use the Hamcrest matcher hasKey() (from org.hamcrest.Matchers class) on JSON strings as well.

when()
    .get("/person/12345")
.then()
    .body("$", hasKey("surname"))
    .body("$", not(hasKey("age")));

Answer 2 · 2022-06-13T15:17:00.799Z

Using: import static org.junit.Assert.assertThat;

Your could then: assertThat(response.then().body(containsString("thingThatShouldntBeHere")), is(false));

Answer 3 · 2022-06-13T15:17:00.805Z

You can use equals(null) like this:

.body("surname", equals(null))

If the field does not exists it will be null

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In REST Assured, how can I check if a field is present or not in the response?

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