BrowserStack API for JavaScript Testing implemented using Java
###What is HTTPCLIENT ?
You retrieve and send data via the HttpClient class. An instance of this class can be created with DefaultHttpClient
DefaultHttpClient is the standard HttpClient and uses the SingleClientConnManager class to handle HTTP connections.
SingleClientConnManager is not thread-safe, this means that access to it via several threads will create problems.
The HttpClient uses a HttpUriRequest to send and receive data. Important subclass of HttpUriRequest are HttpGet and HttpPost.
You can get the response of the HttpClient as an InputStream.
###JAR files needed
- All the 7 JAR files from httpcomponents-client-4.3.4/lib
- json-simple-1.1.1.jar
###Code Explanation I have explained this considering the user has already implemented the BrowserStack API using cURL commands.
All the JS testing is done on BrowserStack.
This HttpClient has to make a request to http://api.browserstack.com/3 (here 3 is the version no.)
Headers such as (-H command in curl) is done using setHeader function.
Note: The headers are not used in Post request, though are used in cURL.
getRequest.setHeader("Accept","application/json");
getRequest.setHeader("Content-type","application/json");Authentication of username and key (-U command in curl) is done using same setHeader function, but you have to explicitly mention "Authentication" in the function parameters
Also the username and key has to be encoded before the request is made. Encoding is done using Base64.encodeBase64String(key.getBytes())
String key = "<username>:<access-key>";
String encoding = Base64.encodeBase64String(key.getBytes());
getRequest.setHeader("Authorization", "Basic " + encoding);The data parameters(-d command in curl) is sent using setEntity function.
First you make a arraylist of all the parameters.
The arraylist has to be of type of NameValuePair.
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("os", obj.get("os")+""));
nameValuePairs.add(new BasicNameValuePair("os_version", obj.get("os_version")+""));
nameValuePairs.add(new BasicNameValuePair("browser", obj.get("browser")+""));
nameValuePairs.add(new BasicNameValuePair("browser_version", obj.get("browser_version")+""));
nameValuePairs.add(new BasicNameValuePair("url", url2));
nameValuePairs.add(new BasicNameValuePair("build", "JS Testing on Java"));
postRequest.setEntity(new UrlEncodedFormEntity(nameValuePairs));We use HttpGet object for GET request, HttpPost object for POST request and so on.
HttpGet getRequest = new HttpGet(url);
HttpPost postRequest = new HttpPost(url);The request is sent to BrowserStack using client.execute() method.
The return is a HttpResponse which can be converted to a String object and printed whenever necessary
response = client.execute(postRequest);
BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
String line = rd.readLine();To get the job ID from response which is generated after a worker is created, the HttpResponse has to converted to a JSONObject
JSONObject JSobj = (JSONObject) parser.parse(line);
jobID=JSobj.get("id")+"";Note: Before deleting a worker the request created for taking a screenshot must be closed.
This is done using EntityUtils.consume(response.getEntity())
###Running JS Testing for different browsers
Javascript testing can run only one test at a time.
So all the different parameters for a particular test case is stored in a JSON file (browsers.json).
All the different sets from this JSON file are extracted and stored in JSONArray.
Each set is a JSONObject.
You run the test in a loop taking one set at a time.
parser = new JSONParser();
Object obj = parser.parse(new FileReader("C:\\JAVA\\Selenium\\browsers.json"));
jsonArray = (JSONArray) obj;
JSONObject obj=(JSONObject)jsonArray.get(count);