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Computing with Data

elgeish
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Data-Driven Testing

Here's an example of table-driven testing in Java using TestNG:

import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import static org.testng.Assert.*;
class Adder {
public int add(int x, int y) {
return x + y;
}
}
public class AdderTest {
@DataProvider(name = "testAdd")
private static Object[][] provideTestData() {
return new Integer[][]{
new Integer[]{0, 0, 0},
new Integer[]{2, 3, 5},
new Integer[]{-3, 5, 2},
new Integer[]{-5, -3, -8},
new Integer[]{-5, 3, -2},
new Integer[]{0, Integer.MAX_VALUE, Integer.MAX_VALUE},
new Integer[]{0, Integer.MIN_VALUE, Integer.MIN_VALUE},
// ...
};
}
@Test(dataProvider = "testAdd")
public void testAdd(int x, int y, int expected) {
final int z = new Adder().add(x, y);
assertEquals(z, expected, "failed for " + x + " and " + y);
}
}
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