how to mock a URL connection

Question

Hi I have a method that takes an URL as an input and determines if it is reachable. Heres the code for that:

public static boolean isUrlAccessible(final Str         


        

Answer 1

Although this thread has some good suggestion, but if any of you is not interested to use those third-party libraries here is a quick solution.

public class MockHttpURLConnection extends HttpURLConnection {
    private int responseCode;
    private URL url;
    private InputStream inputStream;


    public MockHttpURLConnection(URL u){
        super(null);
        this.url=u;
    }
    @Override
    public int getResponseCode() {
        return responseCode;
    }


    public void setResponseCode(int responseCode) {
        this.responseCode = responseCode;
    }

    @Override
    public URL getURL() {
        return url;
    }

    public void setUrl(URL url) {
        this.url = url;
    }

    @Override
    public InputStream getInputStream() {
        return inputStream;
    }

    public void setInputStream(InputStream inputStream) {
        this.inputStream = inputStream;
    }

    @Override
    public void disconnect() {

    }

    @Override
    public boolean usingProxy() {
        return false;
    }

    @Override
    public void connect() throws IOException {

    }
}

And, this how you can set the desired behaviour

   MockHttpURLConnection httpURLConnection=new MockHttpURLConnection(new URL("my_fancy_url"));
        InputStream stream=new ByteArrayInputStream(json_response.getBytes());
        httpURLConnection.setInputStream(stream);
        httpURLConnection.setResponseCode(200);

Note: It just mock 3 methods from HttpUrlConnection and if you are using more method you need to make sure those are mock as well.