/**
    * 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
    * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.hadoop.hbase.util;
  
  import org.apache.hadoop.hbase.testclassification.SmallTests;
  import org.junit.Assert;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  import org.junit.rules.ExpectedException;
  
  @Category({SmallTests.class})
  public class TestStrings {
  
    @Rule
    public final ExpectedException thrown = ExpectedException.none();
  
    @Test
    public void testAppendKeyValue() {
      Assert.assertEquals("foo, bar=baz", Strings.appendKeyValue(
              new StringBuilder("foo"), "bar", "baz").toString());
      Assert.assertEquals("bar->baz", Strings.appendKeyValue(
              new StringBuilder(), "bar", "baz", "->", "| ").toString());
      Assert.assertEquals("foo, bar=baz", Strings.appendKeyValue(
              new StringBuilder("foo"), "bar", "baz", "=", ", ").toString());
      Assert.assertEquals("foo| bar->baz", Strings.appendKeyValue(
              new StringBuilder("foo"), "bar", "baz", "->", "| ").toString());
    }
  
    @Test
    public void testDomainNamePointerToHostName() {
      Assert.assertNull(Strings.domainNamePointerToHostName(null));
      Assert.assertEquals("foo",
              Strings.domainNamePointerToHostName("foo"));
      Assert.assertEquals("foo.com",
              Strings.domainNamePointerToHostName("foo.com"));
      Assert.assertEquals("foo.bar.com",
              Strings.domainNamePointerToHostName("foo.bar.com"));
      Assert.assertEquals("foo.bar.com",
              Strings.domainNamePointerToHostName("foo.bar.com."));
    }
  
    @Test
    public void testPadFront() {
      Assert.assertEquals("ddfoo", Strings.padFront("foo", 'd', 5));
  
      thrown.expect(IllegalArgumentException.class);
      Strings.padFront("foo", 'd', 1);
    }
  }