How to write the unit test cases for this given method below?

Question

1.00/5 (2 votes)

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private void setCountryCodeData() {
       //getting countryCode
       try {

           mCountryCode = PreferenceManager.getPrefIsoCode(LoginActivity.this);

           if (mCountryCode != null || !mCountryCode.equalsIgnoreCase("")) {
               for (CountryCodesResponse codesResponse : mCountryCodeResponse) {
                   if (codesResponse.getIso_code().equalsIgnoreCase(mCountryCode)) {
                       countrycode = codesResponse.getInternationalCallingCode();
                       countryflag = codesResponse.getImage();
                       isonumber = codesResponse.getIso_code();
                       countryname = codesResponse.getName();
                   }
               }
           } else if (getCountryCode() != null && !getCountryCode().equalsIgnoreCase("error")) {
               mCountryCode = getCountryCode();
               for (CountryCodesResponse codesResponse : mCountryCodeResponse) {
                   if (codesResponse.getIso_code().equalsIgnoreCase(mCountryCode)) {
                       countrycode = codesResponse.getInternationalCallingCode();
                       countryflag = codesResponse.getImage();
                       isonumber = codesResponse.getIso_code();
                       countryname = codesResponse.getName();
                   }
               }
           } else {
               countrycode = "+91";
               countryflag = "https://isprava-oi-development.s3.amazonaws.com/country/india/IN_3x.png";
               isonumber = "IN";
               countryname = getResources().getResourceName(R.string.india);
           }

           Glide.with(LoginActivity.this).asBitmap().load(countryflag).into(binding.tvFlagImage);

           binding.tvCountryCode.setText(countrycode);

       } catch (Exception ignored) {
           Log.e("country_code_error", "" + ignored);
           countrycode = "+91";
           countryflag = "https://isprava-oi-development.s3.amazonaws.com/country/india/IN_3x.png";
           isonumber = "IN";
           countryname = getResources().getResourceName(R.string.india);
           binding.tvCountryCode.setText(getResources().getString(R.string.india_country_code));
           binding.tvFlagImage.setImageResource(R.drawable.flag_india);
       }

       //pick mobile number from device
       requestHint();
   }

What I have tried:

I have tried it using as a mockito and then returning the value but by doing this im not able to get the code coverage. and im really confused how to write test cases for this method.

Posted 14-Dec-22 17:30pm

Sushma Prasad 2022

Updated 15-Dec-22 3:02am

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Dave Kreskowiak · Accepted Answer · 2022-12-15T03:02:00

Solution 1

You really can't write proper unit tests for this. Unit testing controls the input to a method and evaluates its output. The method you posted takes no direct input and returns nothing.

If you're going to unit test code, you have to consider that in the design of the code. You're going to have to start reading up on writing testable code. how to write testable code java - Google Search[^]

Posted 15-Dec-22 3:02am

Dave Kreskowiak

Comments

[no name] 19-Dec-22 5:00am

Then can we write a test case for method like this
@Override
public void onCountryCodeClicked(CountryCodesResponse codesResponse, int position) {

try {
if (codesResponse != null && !codesResponse.getInternationalCallingCode().equalsIgnoreCase("")
&& codesResponse.getImage() != null && !codesResponse.getImage().equalsIgnoreCase("")) {
binding.tvCountryCode.setText(codesResponse.getInternationalCallingCode());
Glide.with(LoginActivity.this).asBitmap().load(codesResponse.getImage()).into(binding.tvFlagImage);

} else {
binding.tvCountryCode.setText(getResources().getString(R.string.india_country_code));
binding.tvFlagImage.setImageResource(R.drawable.flag_india);
}

countrycode = codesResponse.getInternationalCallingCode();
countryflag = codesResponse.getImage();
isonumber = codesResponse.getIso_code();
countryname = codesResponse.getName();

} catch (Exception ignored) {
Log.e("country_code_error", "" + ignored);
binding.tvCountryCode.setText(getResources().getString(R.string.india_country_code));
binding.tvFlagImage.setImageResource(R.drawable.flag_india);

countrycode = "+91";
countryflag = "https://isprava-oi-development.s3.amazonaws.com/country/india/IN_3x.png";
isonumber = "IN";
countryname = getResources().getResourceName(R.string.india);

}

binding.layUpdateAvailable.setVisibility(View.GONE);
}

Dave Kreskowiak 19-Dec-22 8:09am

No, because your method still has no output.