1 files changed, 247 insertions, 0 deletions
diff --git a/src/test/java/org/apache/commons/lang3/CharSetUtilsTest.java b/src/test/java/org/apache/commons/lang3/CharSetUtilsTest.java
new file mode 100644
index 000000000..b6b5e7925
--- /dev/null
+++ b/src/test/java/org/apache/commons/lang3/CharSetUtilsTest.java
@@ -0,0 +1,247 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Modifier;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * Unit tests {@link org.apache.commons.lang3.CharSetUtils}.
+ */
+public class CharSetUtilsTest extends AbstractLangTest {
+
+    @Test
+    public void testConstructor() {
+        assertNotNull(new CharSetUtils());
+        final Constructor<?>[] cons = CharSetUtils.class.getDeclaredConstructors();
+        assertEquals(1, cons.length);
+        assertTrue(Modifier.isPublic(cons[0].getModifiers()));
+        assertTrue(Modifier.isPublic(CharSetUtils.class.getModifiers()));
+        assertFalse(Modifier.isFinal(CharSetUtils.class.getModifiers()));
+    }
+
+    @Test
+    public void testSqueeze_StringString() {
+        assertNull(CharSetUtils.squeeze(null, (String) null));
+        assertNull(CharSetUtils.squeeze(null, ""));
+
+        assertEquals("", CharSetUtils.squeeze("", (String) null));
+        assertEquals("", CharSetUtils.squeeze("", ""));
+        assertEquals("", CharSetUtils.squeeze("", "a-e"));
+
+        assertEquals("hello", CharSetUtils.squeeze("hello", (String) null));
+        assertEquals("hello", CharSetUtils.squeeze("hello", ""));
+        assertEquals("hello", CharSetUtils.squeeze("hello", "a-e"));
+        assertEquals("helo", CharSetUtils.squeeze("hello", "l-p"));
+        assertEquals("heloo", CharSetUtils.squeeze("helloo", "l"));
+        assertEquals("hello", CharSetUtils.squeeze("helloo", "^l"));
+    }
+
+    @Test
+    public void testSqueeze_StringStringarray() {
+        assertNull(CharSetUtils.squeeze(null, (String[]) null));
+        assertNull(CharSetUtils.squeeze(null));
+        assertNull(CharSetUtils.squeeze(null, null));
+        assertNull(CharSetUtils.squeeze(null, "el"));
+
+        assertEquals("", CharSetUtils.squeeze("", (String[]) null));
+        assertEquals("", CharSetUtils.squeeze(""));
+        assertEquals("", CharSetUtils.squeeze("", null));
+        assertEquals("", CharSetUtils.squeeze("", "a-e"));
+
+        assertEquals("hello", CharSetUtils.squeeze("hello", (String[]) null));
+        assertEquals("hello", CharSetUtils.squeeze("hello"));
+        assertEquals("hello", CharSetUtils.squeeze("hello", null));
+        assertEquals("hello", CharSetUtils.squeeze("hello", "a-e"));
+
+        assertEquals("helo", CharSetUtils.squeeze("hello", "el"));
+        assertEquals("hello", CharSetUtils.squeeze("hello", "e"));
+        assertEquals("fofof", CharSetUtils.squeeze("fooffooff", "of"));
+        assertEquals("fof", CharSetUtils.squeeze("fooooff", "fo"));
+    }
+
+    @Test
+    public void testContainsAny_StringString() {
+        assertFalse(CharSetUtils.containsAny(null, (String) null));
+        assertFalse(CharSetUtils.containsAny(null, ""));
+
+        assertFalse(CharSetUtils.containsAny("", (String) null));
+        assertFalse(CharSetUtils.containsAny("", ""));
+        assertFalse(CharSetUtils.containsAny("", "a-e"));
+
+        assertFalse(CharSetUtils.containsAny("hello", (String) null));
+        assertFalse(CharSetUtils.containsAny("hello", ""));
+        assertTrue(CharSetUtils.containsAny("hello", "a-e"));
+        assertTrue(CharSetUtils.containsAny("hello", "l-p"));
+    }
+
+    @Test
+    public void testContainsAny_StringStringarray() {
+        assertFalse(CharSetUtils.containsAny(null, (String[]) null));
+        assertFalse(CharSetUtils.containsAny(null));
+        assertFalse(CharSetUtils.containsAny(null, null));
+        assertFalse(CharSetUtils.containsAny(null, "a-e"));
+
+        assertFalse(CharSetUtils.containsAny("", (String[]) null));
+        assertFalse(CharSetUtils.containsAny(""));
+        assertFalse(CharSetUtils.containsAny("", null));
+        assertFalse(CharSetUtils.containsAny("", "a-e"));
+
+        assertFalse(CharSetUtils.containsAny("hello", (String[]) null));
+        assertFalse(CharSetUtils.containsAny("hello"));
+        assertFalse(CharSetUtils.containsAny("hello", null));
+        assertTrue(CharSetUtils.containsAny("hello", "a-e"));
+
+        assertTrue(CharSetUtils.containsAny("hello", "el"));
+        assertFalse(CharSetUtils.containsAny("hello", "x"));
+        assertTrue(CharSetUtils.containsAny("hello", "e-i"));
+        assertTrue(CharSetUtils.containsAny("hello", "a-z"));
+        assertFalse(CharSetUtils.containsAny("hello", ""));
+    }
+
+    @Test
+    public void testCount_StringString() {
+        assertEquals(0, CharSetUtils.count(null, (String) null));
+        assertEquals(0, CharSetUtils.count(null, ""));
+
+        assertEquals(0, CharSetUtils.count("", (String) null));
+        assertEquals(0, CharSetUtils.count("", ""));
+        assertEquals(0, CharSetUtils.count("", "a-e"));
+
+        assertEquals(0, CharSetUtils.count("hello", (String) null));
+        assertEquals(0, CharSetUtils.count("hello", ""));
+        assertEquals(1, CharSetUtils.count("hello", "a-e"));
+        assertEquals(3, CharSetUtils.count("hello", "l-p"));
+    }
+
+    @Test
+    public void testCount_StringStringarray() {
+        assertEquals(0, CharSetUtils.count(null, (String[]) null));
+        assertEquals(0, CharSetUtils.count(null));
+        assertEquals(0, CharSetUtils.count(null, null));
+        assertEquals(0, CharSetUtils.count(null, "a-e"));
+
+        assertEquals(0, CharSetUtils.count("", (String[]) null));
+        assertEquals(0, CharSetUtils.count(""));
+        assertEquals(0, CharSetUtils.count("", null));
+        assertEquals(0, CharSetUtils.count("", "a-e"));
+
+        assertEquals(0, CharSetUtils.count("hello", (String[]) null));
+        assertEquals(0, CharSetUtils.count("hello"));
+        assertEquals(0, CharSetUtils.count("hello", null));
+        assertEquals(1, CharSetUtils.count("hello", "a-e"));
+
+        assertEquals(3, CharSetUtils.count("hello", "el"));
+        assertEquals(0, CharSetUtils.count("hello", "x"));
+        assertEquals(2, CharSetUtils.count("hello", "e-i"));
+        assertEquals(5, CharSetUtils.count("hello", "a-z"));
+        assertEquals(0, CharSetUtils.count("hello", ""));
+    }
+
+    @Test
+    public void testKeep_StringString() {
+        assertNull(CharSetUtils.keep(null, (String) null));
+        assertNull(CharSetUtils.keep(null, ""));
+
+        assertEquals("", CharSetUtils.keep("", (String) null));
+        assertEquals("", CharSetUtils.keep("", ""));
+        assertEquals("", CharSetUtils.keep("", "a-e"));
+
+        assertEquals("", CharSetUtils.keep("hello", (String) null));
+        assertEquals("", CharSetUtils.keep("hello", ""));
+        assertEquals("", CharSetUtils.keep("hello", "xyz"));
+        assertEquals("hello", CharSetUtils.keep("hello", "a-z"));
+        assertEquals("hello", CharSetUtils.keep("hello", "oleh"));
+        assertEquals("ell", CharSetUtils.keep("hello", "el"));
+    }
+
+    @Test
+    public void testKeep_StringStringarray() {
+        assertNull(CharSetUtils.keep(null, (String[]) null));
+        assertNull(CharSetUtils.keep(null));
+        assertNull(CharSetUtils.keep(null, null));
+        assertNull(CharSetUtils.keep(null, "a-e"));
+
+        assertEquals("", CharSetUtils.keep("", (String[]) null));
+        assertEquals("", CharSetUtils.keep(""));
+        assertEquals("", CharSetUtils.keep("", null));
+        assertEquals("", CharSetUtils.keep("", "a-e"));
+
+        assertEquals("", CharSetUtils.keep("hello", (String[]) null));
+        assertEquals("", CharSetUtils.keep("hello"));
+        assertEquals("", CharSetUtils.keep("hello", null));
+        assertEquals("e", CharSetUtils.keep("hello", "a-e"));
+
+        assertEquals("e", CharSetUtils.keep("hello", "a-e"));
+        assertEquals("ell", CharSetUtils.keep("hello", "el"));
+        assertEquals("hello", CharSetUtils.keep("hello", "elho"));
+        assertEquals("hello", CharSetUtils.keep("hello", "a-z"));
+        assertEquals("----", CharSetUtils.keep("----", "-"));
+        assertEquals("ll", CharSetUtils.keep("hello", "l"));
+    }
+
+    @Test
+    public void testDelete_StringString() {
+        assertNull(CharSetUtils.delete(null, (String) null));
+        assertNull(CharSetUtils.delete(null, ""));
+
+        assertEquals("", CharSetUtils.delete("", (String) null));
+        assertEquals("", CharSetUtils.delete("", ""));
+        assertEquals("", CharSetUtils.delete("", "a-e"));
+
+        assertEquals("hello", CharSetUtils.delete("hello", (String) null));
+        assertEquals("hello", CharSetUtils.delete("hello", ""));
+        assertEquals("hllo", CharSetUtils.delete("hello", "a-e"));
+        assertEquals("he", CharSetUtils.delete("hello", "l-p"));
+        assertEquals("hello", CharSetUtils.delete("hello", "z"));
+    }
+
+    @Test
+    public void testDelete_StringStringarray() {
+        assertNull(CharSetUtils.delete(null, (String[]) null));
+        assertNull(CharSetUtils.delete(null));
+        assertNull(CharSetUtils.delete(null, null));
+        assertNull(CharSetUtils.delete(null, "el"));
+
+        assertEquals("", CharSetUtils.delete("", (String[]) null));
+        assertEquals("", CharSetUtils.delete(""));
+        assertEquals("", CharSetUtils.delete("", null));
+        assertEquals("", CharSetUtils.delete("", "a-e"));
+
+        assertEquals("hello", CharSetUtils.delete("hello", (String[]) null));
+        assertEquals("hello", CharSetUtils.delete("hello"));
+        assertEquals("hello", CharSetUtils.delete("hello", null));
+        assertEquals("hello", CharSetUtils.delete("hello", "xyz"));
+
+        assertEquals("ho", CharSetUtils.delete("hello", "el"));
+        assertEquals("", CharSetUtils.delete("hello", "elho"));
+        assertEquals("hello", CharSetUtils.delete("hello", ""));
+        assertEquals("hello", CharSetUtils.delete("hello", ""));
+        assertEquals("", CharSetUtils.delete("hello", "a-z"));
+        assertEquals("", CharSetUtils.delete("----", "-"));
+        assertEquals("heo", CharSetUtils.delete("hello", "l"));
+    }
+
+}