问Junit没有显示任何使用IntelliJ进行UCB cs61B (org.junit.Assert.assertArrayEquals() )的结果。

EN

import static org.junit.Assert.*;
import org.junit.Test;
/** Tests the the Sort class. */
public class TestSort {
/** Test the Sort.sort method. */
@Test
public void testSort() {
    String[] input = {"i", "have", "an", "egg"};
    String[] expected = {"an", "egg", "have", "i"};

    Sort.sort(input);
    if (input != expected)
    {
        System.out.println("something wrong!");
    }

    org.junit.Assert.assertArrayEquals(expected, input);
}
@Test
public void testFindSmallest() {
    String[] input = {"i", "have", "an", "egg"};
    int expected = 2;

    int actual = Sort.findSmallest(input, 0);
    assertEquals(expected, actual);

    String[] input2 = {"there", "are", "many", "pigs"};
    int expected2 = 2;

    int actual2 = Sort.findSmallest(input2, 2);
    assertEquals(expected2, actual2);
}

@Test
public void testSwap() {
    String[] input = {"i", "have", "an", "egg"};
    int a = 0;
    int b = 2;
    String[] expected = {"an", "have", "i", "egg"};

    Sort.swap(input, a, b);
    assertArrayEquals(expected, input);
}
}

public class Sort {
public static void sort(String[] x) {
    sort(x, 0);
}

private static void sort(String[] x, int start) {
    if (start == x.length) {
        return;
    }
    int smallestIndex = findSmallest(x, start);
    swap(x, start, smallestIndex);
    sort(x, start + 1);
}

public static void swap(String[] x, int a, int b) {
    String temp = x[a];
    x[a] = x[b];
    x[b] = temp;
}

public static int findSmallest(String[] x, int start) {
    int smallestIndex = start;
    for (int i = start; i < x.length; i += 1) {
        int cmp = x[i].compareTo(x[smallestIndex]);

        if (cmp < 0) {
            smallestIndex = i;
        }
    }
    return smallestIndex;
}
}