Book Image

Learning Android Application Testing

Book Image

Learning Android Application Testing

Overview of this book

Table of Contents (16 chapters)
Learning Android Application Testing
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Adding functionality


The user interface is in place. Now, we can start adding some basic functionality. This functionality will include the code to handle the actual temperature conversion.

Temperature conversion

From the list of requirements, we can obtain this statement: When one temperature is entered in one field, the other one is automatically updated with the conversion.

Following our plan, we must implement this as a test to verify that the correct functionality is there. Our test would look something like this:

@UiThreadTest
public void testFahrenheitToCelsiusConversion() {
  celsiusInput.clear();
  fahrenheitInput.clear();
  fahrenheitInput.requestFocus();
  fahrenheitInput.setText("32.5");
  celsiusInput.requestFocus();
  double f = 32.5;
  double expectedC = TemperatureConverter.fahrenheitToCelsius(f);
  double actualC = celsiusInput.getNumber();
  double delta = Math.abs(expectedC - actualC);
  String msg = "" + f + "F -> " + expectedC + "C but was " 
    + actualC + "C (delta...