content: /*
   * 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 com.aliyun.oss.common.utils;
  
  import java.math.BigDecimal;
  import java.math.BigInteger;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Random;
  
  import org.junit.Test;
  
  import static org.junit.Assert.*;
  
  /**
   * Unit tests for the StringUtils class.
   */
  public class StringUtilsTest {
  
      /**
       * Tests that we can correctly convert Bytes to strings.
       */
      @Test
      public void testFromByte() {
          assertEquals("123", StringUtils.fromByte(new Byte("123")));
          assertEquals("-99", StringUtils.fromByte(new Byte("-99")));
      }
  
      @Test(timeout = 10 * 1000)
      public void replace_ReplacementStringContainsMatchString_DoesNotCauseInfiniteLoop() {
          assertEquals("aabc", StringUtils.replace("abc", "a", "aa"));
      }
  
      @Test
      public void replace_EmptyReplacementString_RemovesAllOccurencesOfMatchString() {
          assertEquals("bbb", StringUtils.replace("ababab", "a", ""));
      }
  
      @Test
      public void replace_MatchNotFound_ReturnsOriginalString() {
          assertEquals("abc", StringUtils.replace("abc", "d", "e"));
      }
  
      @Test
      public void lowerCase_NonEmptyString() {
          String input = "x-amz-InvocAtion-typE";
          String expected = "x-amz-invocation-type";
          assertEquals(expected, StringUtils.lowerCase(input));
      }
  
      @Test
      public void lowerCase_NullString() {
          assertNull(StringUtils.lowerCase(null));
      }
  
      @Test
      public void lowerCase_EmptyString() {
          assertEquals(StringUtils.lowerCase(""), "");
      }
  
      @Test
      public void upperCase_NonEmptyString() {
          String input = "dHkdjj139_)(e";
          String expected = "DHKDJJ139_)(E";
          assertEquals(expected, StringUtils.upperCase(input));
      }
  
      @Test
      public void upperCase_NullString() {
          assertNull(StringUtils.upperCase((null)));
      }
  
      @Test
      public void upperCase_EmptyString() {
          assertEquals(StringUtils.upperCase(""), "");
      }
  
      @Test
      public void testCompare() {
          assertTrue(StringUtils.compare("truck", "Car") > 0);
          assertTrue(StringUtils.compare("", "dd") < 0);
          assertTrue(StringUtils.compare("dd", "") > 0);
          assertEquals(0, StringUtils.compare("", ""));
          assertTrue(StringUtils.compare(" ", "") > 0);
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testCompare_String1Null() {
          String str1 = null;
          String str2 = "test";
          StringUtils.compare(str1, str2);
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testCompare_String2Null() {
          String str1 = "test";
          String str2 = null;
          StringUtils.compare(str1, str2);
      }
  
      @Test
      public void testAppendAndCompact() {
          String[] pieces = {" ", "\t", "\n", "\u000b", "\r", "\f", "word", "foo", "bar", "baq"};
          int ITERATIONS = 10000;
          Random rng = new Random();
  
          for (int i = 0; i < ITERATIONS; i++) {
              int parts = rng.nextInt(10);
              String s = "";
              for (int j = 0; j < parts; j++) {
                  s = s + pieces[rng.nextInt(pieces.length)];
              }
  
              StringBuilder sb = new StringBuilder();
              StringUtils.appendCompactedString(sb, s);
              String compacted = s.replaceAll("\\s+", " ");
              assertEquals('[' + compacted + ']', sb.toString(), compacted);
          }
      }
  
      @Test
      public void begins_with_ignore_case() {
          assertTrue(StringUtils.beginsWithIgnoreCase("foobar", "FoO"));
      }
  
      @Test
      public void begins_with_ignore_case_returns_false_when_seq_doesnot_match() {
          assertFalse(StringUtils.beginsWithIgnoreCase("foobar", "baz"));
      }
  
      @Test
      public void hasValue() {
          assertTrue(StringUtils.hasValue("something"));
          assertFalse(StringUtils.hasValue(null));
          assertFalse(StringUtils.hasValue(""));
      }
  
      @Test
      public void testToFromValue() {
          StringBuilder value;
  
          value = new StringBuilder();
          value.append(1);
          assertEquals(new Integer(1), StringUtils.toInteger(value));
  
          value = new StringBuilder();
          value.append("hello");
          assertEquals("hello", StringUtils.toString(value));
  
          value = new StringBuilder();
          value.append("false");
          assertEquals(false, StringUtils.toBoolean(value));
  
          assertEquals(BigInteger.valueOf(123), StringUtils.toBigInteger("123"));
  
          assertEquals(BigDecimal.valueOf(123), StringUtils.toBigDecimal("123"));
  
          assertEquals("123", StringUtils.fromInteger(123));
          assertEquals("123", StringUtils.fromLong((long) 123));
          assertEquals("hello", StringUtils.fromString("hello"));
          assertEquals("false", StringUtils.fromBoolean(false));
          assertEquals("123", StringUtils.fromBigInteger(BigInteger.valueOf(123)));
          assertEquals("123", StringUtils.fromBigDecimal(BigDecimal.valueOf(123)));
          assertEquals("123.1", StringUtils.fromFloat((float) 123.1));
          assertEquals("123.2", StringUtils.fromDouble((double) 123.2));
      }
  
      @Test
      public void testJoinString() {
          String part1 = "hello";
          String part2 = "world";
          String join = StringUtils.join("-", part1, part2);
          assertEquals("hello-world", join);
  
          Collection<String> collection = new ArrayList<String>();
          collection.add("hello");
          collection.add("world");
          join = StringUtils.join("-", collection);
          assertEquals("hello-world", join);
      }
  }
  