X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=test%2Fjalview%2Futil%2FStringUtilsTest.java;fp=test%2Fjalview%2Futil%2FStringUtilsTest.java;h=eba2da4eb16ae118c4f0fbd8e83526e22d5d976c;hb=2a4301b8fdda9f4e9d77473402d9b91b51009735;hp=0000000000000000000000000000000000000000;hpb=f155f699a62c6e56eb1a76d3131756a651ea7175;p=jalview.git

diff --git a/test/jalview/util/StringUtilsTest.java b/test/jalview/util/StringUtilsTest.java
new file mode 100644
index 0000000..eba2da4
--- /dev/null
+++ b/test/jalview/util/StringUtilsTest.java
@@ -0,0 +1,56 @@
+package jalview.util;
+
+import static org.junit.Assert.assertTrue;
+
+import java.util.Arrays;
+
+import org.junit.Test;
+
+public class StringUtilsTest
+{
+
+  @Test
+  public void testInsertCharAt()
+  {
+    char[] c1 = "ABC".toCharArray();
+    char[] expected = new char[]
+    { 'A', 'B', 'C', 'w', 'w' };
+    assertTrue(Arrays.equals(expected,
+            StringUtils.insertCharAt(c1, 3, 2, 'w')));
+    expected = new char[]
+    { 'A', 'B', 'C', 'w', 'w' };
+    assertTrue(Arrays.equals(expected,
+            StringUtils.insertCharAt(c1, 4, 2, 'w')));
+    assertTrue(Arrays.equals(expected,
+            StringUtils.insertCharAt(c1, 5, 2, 'w')));
+    assertTrue(Arrays.equals(expected,
+            StringUtils.insertCharAt(c1, 6, 2, 'w')));
+    assertTrue(Arrays.equals(expected,
+            StringUtils.insertCharAt(c1, 7, 2, 'w')));
+  }
+
+  @Test
+  public void testDeleteChars()
+  {
+    char[] c1 = "ABC".toCharArray();
+
+    // delete second position
+    assertTrue(Arrays.equals(new char[]
+    { 'A', 'C' }, StringUtils.deleteChars(c1, 1, 2)));
+
+    // delete positions 1 and 2
+    assertTrue(Arrays.equals(new char[]
+    { 'C' }, StringUtils.deleteChars(c1, 0, 2)));
+
+    // delete positions 1-3
+    assertTrue(Arrays.equals(new char[]
+    {}, StringUtils.deleteChars(c1, 0, 3)));
+
+    // delete position 3
+    assertTrue(Arrays.equals(new char[]
+    { 'A', 'B' }, StringUtils.deleteChars(c1, 2, 3)));
+
+    // out of range deletion is ignore
+    assertTrue(Arrays.equals(c1, StringUtils.deleteChars(c1, 3, 4)));
+  }
+}