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Start your free trialEnyang Mercy
Courses Plus Student 2,339 PointsUnit Test in java Calculator Test @BeforeMethod
How do i fix the arrange part? I already instantiated a new Calculator in each method. But i can't compile . Can u please identify the error and make corrections. Thanks
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 = new Calculator();
}
@Test
public void addingMultipleNumbersProducesResult() throws Exception {
Calculator calculator = new Calculator();
int answer = calculator.addNumbers(1 ,2, 3);
assertEquals(6, answer);
}
@Test
public void addingSingleNumberTotalsAppropriately() throws Exception {
Calculator calculator = new Calculator();
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;
}
}
1 Answer
Pedro Cabral
33,586 PointsYou have a couple of problems:
- In your before method, you declared an object of type Calculator but you did not assign it a variable name.
- The point of having the Calculator in the before method is to avoid repetition in your tests, so you can remove those repeated assignments/instantiations as you are meant to initialise the calculator only once.
- Once you remove it from your test methods, you need a way to access it, so you should move calculator to a field/property of the class and leave the instantiation in your before method so that it will be available to all tests.