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Megan Zanders
3,623 PointsI don't understand
I am looking at this question and my mind is going blank. I tried to just take the instantiation and put it in the @Before statement but I guess that wasn't right. What should I do?
package com.example;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.*;
public class CalculatorTest {
@Before
public void setUp() throws Exception {
Calculator calculator = new Calculator();
}
@Test
public void addingMultipleNumbersProducesResult() throws Exception {
int answer = calculator.addNumbers(1 ,2, 3);
assertEquals(6, answer);
}
@Test
public void addingSingleNumberTotalsAppropriately() throws Exception {
int answer = calculator.addNumbers(1);
assertEquals(1, answer);
}
}
package com.example;
public class Calculator {
public int addNumbers(int... numbers) {
int total = 0;
for (int number : numbers) {
total += number;
}
return total;
}
}
2 Answers

Seth Kroger
56,404 PointsYou need to declare calculator
as an instance variable first, not as a local variable in setUp():
private Calculator calculator;
@Before
public void setUp() throws Exception {
calculator = new Calculator();
}

adrian miranda
13,532 PointsThe way you have declared your calculator, it is local to the setup method. As soon as setup is complete, it ceases to exist. You need to make it available to all methods of this class. How do you normally make a variable available to all methods of a class? By making it a member variable.
You should still initialize it in the Setup method. Just don't declare it there.