ParameterizedTest: List sum
In this exercise, you will practice providing objects as arguments for parameterized tests. Consider the sumList
method and the test cases for it.
Complete the parameterized test and the arguments method.
Este exercício faz parte do curso
Introduction to Testing in Java
Instruções do exercício
- Use the correct annotation for a method source and provide the method name.
- Declare the arguments provider method, making sure it has the correct keywords and return type.
- For the final
Argumentsobject, usenulland its expected sum.
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
public class SumOfList {
public static void main(String[] args) {
launchTestsAndPrint(ListSumTest.class);
}
}
class ListSumTest {
@ParameterizedTest
// Invoke the correct annotation for a method source
@____("____")
void sumList_sumsList(List list, int expectedSum) {
int actualSum = ListSum.sumList(list);
assertEquals(expectedSum, actualSum);
}
// Declare the correct method signature
____ ____ List listsAndSums() {
return List.of(
Arguments.of(List.of(1, 2, 3, 4), 10),
Arguments.of(List.of(-5, 5), 0),
Arguments.of(List.of(), 0),
// Create a null list and the expected sum in that case
Arguments.of(null, ____));
}
}