Validate if response at the root element contains partially an expected json

[David Prévost]

I'm doing some BDD test using Rest-Assured and I would like to validate that a json response contains at least some given fields with theirs corresponding values.

I was able to achieve this validation using assert-j below.

1. I parse the root response in a map of fields/values

2. I do the same for the expected json fields/values

3. I use assertj to validate if the response map contains the expected map of fields/values.

Map<String, Object> actual = JsonPath.from(restAssuredResponse.body().asString()).getMap(ROOT);

String expectedJson = readJsonFromFile(fileName);
Map<String, Object> expected = JsonPath.from(expectedJson).getMap("");

assertThat(actual).containsAllEntriesOf(expected);

However, I would like to use the Rest-Assured api intead of parsing the response and my expected result. In order words, I would like to have something similar to:

String expectedJson = readJsonFromFile(fileName);
Map<String, Object> expected = JsonPath.from(expectedJson).getMap(ROOT);

restAssuredResponse.then().assertThat().body(containsAllEntriesOf(expected));

Or
String expectedJson = readJsonFromFile(fileName);

restAssuredResponse.then().assertThat().body(containsAllEntriesOf(expectedJson));

I tried something like below 
String expectedJson = readJsonFromFile(fileName);
Map<String, Object> expected = JsonPath.from(expectedJson).getMap(ROOT);

restAssuredResponse.then().body(containsInAnyOrder(expected));

but I got the error:

java.lang.AssertionError: 1 expectation failed.
Response body doesn't match expectation.
Expected: iterable over [<{date_time=2017-12-25T20:00:00Z>] in any order
  Actual: {"event_id":"1260366", "date_time":"2017-12-25T20:00:00Z"}


Does anyone has some idea?

Thanks

David

[David Prévost]

After some digging, I found 2 solutions

1. To check if the complete response contains some json we can do this (using hamcrest-json):

String expectedJson = readJsonFromFile(expectedFileNameOrJsonContent);

restAssuredResponse.then().assertThat()
.body(SameJSONAs.sameJSONAs(expectedJson).allowingAnyArrayOrdering().allowingExtraUnexpectedFields());

However, this works only when dealing with the complete body, if you try the same thing for a given path it will not work. So when given a path we can use something like:

String expectedJson = readJsonFromFile(expectedFileNameOrJsonContent);

restAssuredResponse.then().assertThat().body(path,
    hasItems(JsonPath.from(expectedJson).getMap(ROOT)));

This bring to the second solution where if the path is "" then it do the same as the first solution.

I would have like to have the first solution works also when given a path but the second one is also pretty good.

Hope It can helps others!

[Johan Haleby]

Thanks for sharing your solution David!

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[David Prévost]

I did a small mistake below is the working version. Note that the cast to Object is required else I'm getting this error: "java.lang.ClassCastException: java.util.HashMap cannot be cast to [Lorg.hamcrest.Matcher"

String expectedJson = readJsonFromFile(expectedFileNameOrJsonContent);

restAssuredResponse.then().assertThat().body(path,

    hasItems((Object)JsonPath.from(expectedJson).get(ROOT)));