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Java Unit Testing in Java How to Test Using Before to not repeat yourself

joune raa
joune raa
1,345 Points

Syntax error: cannot find symbol calculator = new Calculator();

I think there is a bug in the last exercise where you shall instantiate a new Calculator and use that instance in each method. It seems like the test instance doesnt have acces to a calculator. I cant seem to fix this, any help will truly be appreciated :) Btw awesome courses!

com/example/CalculatorTest.java
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 {

    }

    @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);
    }
}
com/example/Calculator.java
package com.example;

public class Calculator {

    public int addNumbers(int... numbers) {
        int total = 0;
        for (int number : numbers) {
            total += number;
        }
        return total;
    }
}

1 Answer

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there! No it can't find it, because you likely haven't declared it. So I'm just going to leave a hint here. This first needs to be declared as a private variable. Take a look at this video at 2:17. Craig will show you how it's done. Hope this helps! :sparkles: