content: package com.alibaba.json.bvt.path.extract;
  
  import com.alibaba.fastjson.JSONPath;
  import com.alibaba.fastjson.util.IOUtils;
  import junit.framework.TestCase;
  
  import java.io.InputStream;
  import java.io.InputStreamReader;
  
  public class JSONPath_extract_2_book extends TestCase {
  
      public void test_0() throws Exception {
          assertEquals("[\"Nigel Rees\",\"Evelyn Waugh\",\"Herman Melville\",\"J. R. R. Tolkien\"]"
                  , JSONPath.extract(json, "$.store.book.author")
                      .toString());
      }
  
      public void test_1() throws Exception {
          assertEquals("[\"Nigel Rees\",\"Evelyn Waugh\",\"Herman Melville\",\"J. R. R. Tolkien\"]"
                  , JSONPath.extract(json, "$.store.book[*].author")
                          .toString());
      }
  
      public void test_2() throws Exception {
          assertNull(JSONPath.extract(json, "$.author"));
      }
  
      public void test_3() throws Exception {
          assertEquals("[\"Nigel Rees\",\"Evelyn Waugh\",\"Herman Melville\",\"J. R. R. Tolkien\"]"
                  , JSONPath.extract(json, "$..author")
                          .toString());
      }
  
      public void test_4() throws Exception {
          assertEquals("[[{\"category\":\"reference\",\"author\":\"Nigel Rees\",\"title\":\"Sayings of the Century\",\"price\":8.95},{\"category\":\"fiction\",\"author\":\"Evelyn Waugh\",\"title\":\"Sword of Honour\",\"price\":12.99},{\"category\":\"fiction\",\"author\":\"Herman Melville\",\"title\":\"Moby Dick\",\"isbn\":\"0-553-21311-3\",\"price\":8.99},{\"category\":\"fiction\",\"author\":\"J. R. R. Tolkien\",\"title\":\"The Lord of the Rings\",\"isbn\":\"0-395-19395-8\",\"price\":22.99}],{\"color\":\"red\",\"price\":19.95}]"
                  , JSONPath.extract(json, "$.store.*")
                          .toString());
      }
  
      public void test_5() throws Exception {
          assertEquals("$.store..price", "[8.95,12.99,8.99,22.99,19.95]"
                  , JSONPath.extract(json, "$.store..price")
                          .toString());
      }
  
      public void test_6() throws Exception {
          assertEquals("{\"category\":\"fiction\",\"author\":\"Herman Melville\",\"title\":\"Moby Dick\",\"isbn\":\"0-553-21311-3\",\"price\":8.99}"
                  , JSONPath.extract(json, "$..book[2]")
                          .toString());
      }
  
      public void test_7  () throws Exception {
          assertEquals("[{\"category\":\"reference\",\"author\":\"Nigel Rees\",\"title\":\"Sayings of the Century\",\"price\":8.95},{\"category\":\"fiction\",\"author\":\"Evelyn Waugh\",\"title\":\"Sword of Honour\",\"price\":12.99}]"
                  , JSONPath.extract(json, "$..book[0,1]")
                          .toString());
      }
  
      public void test_8() throws Exception {
          assertEquals("{\"category\":\"fiction\",\"author\":\"Herman Melville\",\"title\":\"Moby Dick\",\"isbn\":\"0-553-21311-3\",\"price\":8.99}"
                  , JSONPath.extract(json, "$..book[-2]")
                          .toString());
      }
  
      public void test_9() throws Exception {
          assertEquals("Nigel Rees"
                  , JSONPath.extract(json, "$['store']['book'][0]['author']")
                          .toString());
  
          assertEquals("Evelyn Waugh"
                  , JSONPath.extract(json, "$['store']['book'][1]['author']")
                          .toString());
  
          assertEquals("Herman Melville"
                  , JSONPath.extract(json, "$['store']['book'][2]['author']")
                          .toString());
  
          assertEquals("J. R. R. Tolkien"
                  , JSONPath.extract(json, "$['store']['book'][3]['author']")
                          .toString());
      }
  
      public void test_10() throws Exception {
          assertEquals("[{\"category\":\"reference\",\"author\":\"Nigel Rees\",\"title\":\"Sayings of the Century\",\"price\":8.95},{\"category\":\"fiction\",\"author\":\"Herman Melville\",\"title\":\"Moby Dick\",\"isbn\":\"0-553-21311-3\",\"price\":8.99}]"
                  , JSONPath.extract(json, "$.store.book[?(@.price < 10)]")
                          .toString());
      }
  
      public void test_11() throws Exception {
          assertEquals("10"
                  , JSONPath.extract(json, "$.expensive")
                          .toString());
      }
  
      public void test_12() throws Exception {
          assertNull(JSONPath.extract(json, "$.store.book.doesnt_exist"));
      }
  
      public void test_13() throws Exception {
          assertEquals("J. R. R. Tolkien", JSONPath.extract(json, "$.store.book[3].author"));
      }
  
      public void test_14() throws Exception {
          assertEquals("[{\"category\":\"reference\",\"author\":\"Nigel Rees\",\"title\":\"Sayings of the Century\",\"price\":8.95},{\"category\":\"fiction\",\"author\":\"Evelyn Waugh\",\"title\":\"Sword of Honour\",\"price\":12.99},{\"category\":\"fiction\",\"author\":\"Herman Melville\",\"title\":\"Moby Dick\",\"isbn\":\"0-553-21311-3\",\"price\":8.99},{\"category\":\"fiction\",\"author\":\"J. R. R. Tolkien\",\"title\":\"The Lord of the Rings\",\"isbn\":\"0-395-19395-8\",\"price\":22.99}]"
                  , JSONPath.extract(json, "$.store.book").toString());
      }
  
      public void test_15() throws Exception {
          assertEquals("{\"category\":\"reference\",\"author\":\"Nigel Rees\",\"title\":\"Sayings of the Century\",\"price\":8.95}"
                  , JSONPath.extract(json, "$[\"store\"][\"book\"][0]").toString());
      }
  
      public void test_16() throws Exception {
          assertNull(JSONPath.extract(json, "$.store.object.inner_object.array[0].inner_array[0].x"));
      }
  
      public void test_17() throws Exception {
          assertEquals(4, JSONPath.extract(json, "$..book.length()"));
      }
  
  
      private static String json;
      static {
          InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream("json/book.json");
          InputStreamReader reader = new InputStreamReader(is);
          json = IOUtils.readAll(reader);
          IOUtils.close(reader);
      }
  }
  