/*
    * 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
    *
    *      https://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.text.translate;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import org.apache.commons.lang3.AbstractLangTest;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests for {@link org.apache.commons.lang3.text.translate.UnicodeEscaper}.
   */
  @Deprecated
  class UnicodeUnescaperTest extends AbstractLangTest {
  
      @Test
      void testLessThanFour() {
          final UnicodeUnescaper uu = new UnicodeUnescaper();
          // A truncated escape is not a well-formed escape: it passes through untranslated.
          final String input = "\\0047\\u006";
          assertEquals(input, uu.translate(input), "A truncated Unicode escape sequence must pass through untranslated");
      }
  
      @Test
      void testNonAsciiHexDigits() {
          final UnicodeUnescaper uu = new UnicodeUnescaper();
          // Integer.parseInt would accept Unicode decimal digits from any script and fullwidth Latin hex
          // letters via Character.digit; those spellings are not well-formed escapes and pass through.
          assertEquals("\\u\uFF10\uFF10\uFF12\uFF12", uu.translate("\\u\uFF10\uFF10\uFF12\uFF12"),
                  "Fullwidth digit spellings must pass through untranslated");
          assertEquals("\\u\u0660\u0660\u0664\u0661", uu.translate("\\u\u0660\u0660\u0664\u0661"),
                  "Arabic-Indic digit spellings must pass through untranslated");
      }
  
      @Test
      void testSignedValue() {
          final UnicodeUnescaper uu = new UnicodeUnescaper();
          // Integer.parseInt accepts a leading sign, but a sign character is not an ASCII hex digit:
          // these are not well-formed escapes and pass through untranslated.
          assertEquals("\\u-047", uu.translate("\\u-047"), "A signed Unicode escape sequence must pass through untranslated");
          assertEquals("\\u++0047", uu.translate("\\u++0047"), "A signed Unicode escape sequence must pass through untranslated");
          // The documented u+ notation is still accepted.
          assertEquals("G", uu.translate("\\u+0047"), "Failed to unescape Unicode characters with 'u+' notation");
      }
  
      // Requested in LANG-507
      @Test
      void testUPlus() {
          final UnicodeUnescaper uu = new UnicodeUnescaper();
          final String input = "\\u+0047";
          assertEquals("G", uu.translate(input), "Failed to unescape Unicode characters with 'u+' notation");
      }
  
      @Test
      void testUuuuu() {
          final UnicodeUnescaper uu = new UnicodeUnescaper();
          final String input = "\\uuuuuuuu0047";
          final String result = uu.translate(input);
          assertEquals("G", result, "Failed to unescape Unicode characters with many 'u' characters");
      }
  }