junit

1import org.junit.Assert;
2import org.junit.Test;
3
4public class Test {
5
6    public static int square(int n) {
7        return n * n;
8    }
9
10    @Test
11    public void squareTest() {
12        Assert.assertEquals(25, square(5));
13        Assert.assertEquals(16, square(4));
14        Assert.assertEquals(9, square(3));
15        Assert.assertEquals(4, square(2));
16        Assert.assertEquals(1, square(1));
17    }
18}
19

1-It is an open-source testing framework for java programmers. 
2-Test runner support to execute the test case
3-It is one of the unit testing framework.
4-Assertion support for checking the expected result.
5-Annotation support for test cases
6

1import org.junit.Assert;
2import org.junit.Test;
3
4public class Test {
5
6    public static int square(int n) {
7        return n * n;
8    }
9
10    @Test
11    public void squareTest() {
12        Assert.assertEquals(25, square(5));
13        Assert.assertEquals(16, square(4));
14        Assert.assertEquals(9, square(3));
15        Assert.assertEquals(4, square(2));
16        Assert.assertEquals(1, square(1));
17    }
18}

1import static org.junit.jupiter.api.Assertions.assertEquals;
2
3import org.junit.jupiter.api.Test;
4
5public class MyTests {
6
7    @Test
8    public void multiplicationOfZeroIntegersShouldReturnZero() {
9        MyClass tester = new MyClass(); // MyClass is tested
10
11        // assert statements
12        assertEquals(0, tester.multiply(10, 0), "10 x 0 must be 0");
13        assertEquals(0, tester.multiply(0, 10), "0 x 10 must be 0");
14        assertEquals(0, tester.multiply(0, 0), "0 x 0 must be 0");
15    }
16}

1-It is an open-source testing framework for java programmers. 
2-Test runner support to execute the test case
3-It is one of the unit testing framework.
4-Assertion support for checking the expected result.
5-Annotation support for test cases