test junit java example
Example 1: java junit test
import org.junit.Assert;
import org.junit.Test;
public class Test {
public static int square(int n) {
return n * n;
}
@Test
public void squareTest() {
Assert.assertEquals(25, square(5));
Assert.assertEquals(16, square(4));
Assert.assertEquals(9, square(3));
Assert.assertEquals(4, square(2));
Assert.assertEquals(1, square(1));
}
}
Example 2: how to write a junit test case in java
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
public class MyTests {
@Test
public void multiplicationOfZeroIntegersShouldReturnZero() {
MyClass tester = new MyClass(); // MyClass is tested
// assert statements
assertEquals(0, tester.multiply(10, 0), "10 x 0 must be 0");
assertEquals(0, tester.multiply(0, 10), "0 x 10 must be 0");
assertEquals(0, tester.multiply(0, 0), "0 x 0 must be 0");
}
}
Example 3: junit test
import junit.framework.*;
public class JavaTest extends TestCase {
protected int value1, value2;
// assigning the values
protected void setUp(){
value1 = 3;
value2 = 3;
}
// test method to add two values
public void testAdd(){
double result = value1 + value2;
assertTrue(result == 6);
}
}