3 import static org.junit.Assert.assertTrue;
5 import java.util.Arrays;
9 public class StringUtilsTest
13 public void testInsertCharAt()
15 char[] c1 = "ABC".toCharArray();
16 char[] expected = new char[]
17 { 'A', 'B', 'C', 'w', 'w' };
18 assertTrue(Arrays.equals(expected,
19 StringUtils.insertCharAt(c1, 3, 2, 'w')));
21 { 'A', 'B', 'C', 'w', 'w' };
22 assertTrue(Arrays.equals(expected,
23 StringUtils.insertCharAt(c1, 4, 2, 'w')));
24 assertTrue(Arrays.equals(expected,
25 StringUtils.insertCharAt(c1, 5, 2, 'w')));
26 assertTrue(Arrays.equals(expected,
27 StringUtils.insertCharAt(c1, 6, 2, 'w')));
28 assertTrue(Arrays.equals(expected,
29 StringUtils.insertCharAt(c1, 7, 2, 'w')));
33 public void testDeleteChars()
35 char[] c1 = "ABC".toCharArray();
37 // delete second position
38 assertTrue(Arrays.equals(new char[]
39 { 'A', 'C' }, StringUtils.deleteChars(c1, 1, 2)));
41 // delete positions 1 and 2
42 assertTrue(Arrays.equals(new char[]
43 { 'C' }, StringUtils.deleteChars(c1, 0, 2)));
45 // delete positions 1-3
46 assertTrue(Arrays.equals(new char[]
47 {}, StringUtils.deleteChars(c1, 0, 3)));
50 assertTrue(Arrays.equals(new char[]
51 { 'A', 'B' }, StringUtils.deleteChars(c1, 2, 3)));
53 // out of range deletion is ignore
54 assertTrue(Arrays.equals(c1, StringUtils.deleteChars(c1, 3, 4)));