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Testing server side automation using Java and JSON requests

I haven't tested automation before, only jUnit testing, now I have a request for this. But the automation is not on frontend using Selenium or so, it is easier than using JSON requests. I understand the principles of this, but don't know how to do it programmatically correctly. I have to make a payment request to the server and see if the answer is correct, not just the code, but the details of the response.

So far I have been doing the server request part, now when I get the response, what's the best way to compare or test it or how can I see if everything is correct? can you point me in the right direction?

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If I understand your requirement correctly, then:

  • First check what is the request and response format.
  • As you said its JSON, you can easily do it with JAVA. Use java package - org.json.JSONObject to create request and validate JSON format.

  • You can send a request and get a response with this simple code:

            CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpGet GetRequest = new HttpGet("ServerURL");
        CloseableHttpResponse response = httpclient.execute(GetRequest);

    use packages: import org.apache.http.impl.client.CloseableHttpClient;

    you may also need to download apache - httpClient jar.

  • Once you get the answer, read it with the help of some reader, for example:

    BufferedReader rd = new BufferedReader( new  InputStreamReader(response.getEntity().getContent()));

  • Convert this answer to a string, for example:

        String line = "";
    StringBuffer result = new StringBuffer();
    while ((line = rd.readLine()) != null)
    {
        result.append(line);
    }

  • Finally, you have a string response, this can be parsed using the java package - org.json.JSONObject. Parse the JSON response as:

    JSONObject js = new JSONObject(hudsonRTBObjectJSONString);


Hope it helps

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