I pledge the highest level of ethical principles in support of academic excellence.
I ensure that all of my work reflects my own abilities and not those of someone else. #Question Answer this hypothetical question in the README file:

Saying we want to add a cool feature - button "x" to run multiplication. What code do we need to change/add/remove to support this feature? Which tests can we run on the calculator? On the activity? On the app?

Answer

If we want to add button x that multiply the operands, we have to add to the UI button: xml, image, and textview In addition, we have to add it to the logic app, and consider the order of the operations (e.g "2+32) the 23 suppsosed to be calculated before the 2+ so we can evaluate the formula with stack. We would like to add as well tests for all the parts of our program:

1. calculator tests - add tests that check the behavior of the new operator, and also check the order of the operation.
2. Activity tests - add tests like the tests that we wrote to plus and minus operators.
3. flow tests - we should add flow tests that combine few operators.

AndroidCalculator - Calculator exercise for Android developers

In this project:

• Calculator screen with XML ready for portrait and landscape
• Calculator interface used by the Activity
• Unit tests for the calculator and the activity

Your job:

• Implement SimpleCalculatorImpl.java
• add more unit tests to SimpleCalculatorImpl.java
• Implement MainActivity.java
• add more unit tests to MainActivityTest.java
• add more flow tests to AppFlowTest.java

Basically look for "TODO" in the code.

Good luck!