cs61b-3

Ad Hoc Testing

unstructed testing type, also called random testing

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public class TestSort {
    /** Tests the sort method of the Sort class. */
    public static void testSort() {
        String[] input = {"i", "have", "an", "egg"};
        String[] expected = {"an", "egg", "have", "i"};
        Sort.sort(input);
        for (int i = 0; i < input.length; i += 1) {
            if (!input[i].equals(expected[i])) {
                System.out.println("Mismatch in position " + i + ", expected: " + expected + ", but got: " + input[i] + ".");
                break;
            }
        }
    }

    public static void main(String[] args) {
        testSort();
    }
}

JUnit Testing

org.junit library provide number of methods

• https://junit.org/junit4/javadoc/4.12/org/junit/package-summary.html
• org.junit.Assert.assertArrayEquals()
• org.junit.Assert.assertEquals()
• …
• org.junit.Test

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  public static void testSort() { String[] input = {"i", "have", "an", "egg"}; String[] expected = {"an", "egg", "have", "i"}; Sort.sort(input); org.junit.Assert.assertArrayEquals(expected, input); }

enhancements

• precede each method with @org.junit.Test
• change each test method to be non-static
• remove main method from test class
• by adding import
  • import org.junit.Test; change @org.junit.Test to @Test
  • import static org.junit.Assert.*; omit org.junit.Assert. later in code

references

• https://joshhug.gitbooks.io/hug61b/content/chap3/chap31.html
• https://sp19.datastructur.es/materials/proj/proj1b/proj1b