content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed 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.alibaba.nacos.common.packagescan;
  
  import com.alibaba.nacos.common.packagescan.mock.AnnotationClass;
  import com.alibaba.nacos.common.packagescan.mock.MockClass;
  import com.alibaba.nacos.common.packagescan.mock.TestScan;
  import com.alibaba.nacos.common.packagescan.resource.PathMatchingResourcePatternResolver;
  import com.alibaba.nacos.common.packagescan.resource.Resource;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.lang.reflect.Field;
  import java.util.Set;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.mockito.ArgumentMatchers.anyString;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  @ExtendWith(MockitoExtension.class)
  class DefaultPackageScanTest {
      
      @Mock
      PathMatchingResourcePatternResolver pathMatchingResourcePatternResolver;
      
      DefaultPackageScan packageScan;
      
      @BeforeEach
      void setUp() throws Exception {
          packageScan = new DefaultPackageScan();
      }
      
      @Test
      void testGetSubTypesOf() {
          packageScan = new DefaultPackageScan();
          Set<Class<MockClass>> subTypesOf = packageScan.getSubTypesOf(AnnotationClass.class.getPackage().getName(),
                  MockClass.class);
          assertEquals(3, subTypesOf.size());
      }
      
      @Test
      void testGetTypesAnnotatedWith() {
          packageScan = new DefaultPackageScan();
          Set<Class<Object>> actual = packageScan.getTypesAnnotatedWith(AnnotationClass.class.getPackage().getName(),
                  TestScan.class);
          assertEquals(1, actual.size());
          assertEquals(AnnotationClass.class, actual.iterator().next());
      }
      
      @Test
      void testGetSubTypesOfWithException() throws NoSuchFieldException, IllegalAccessException, IOException {
          setResolver();
          String path = AnnotationClass.class.getPackage().getName();
          when(pathMatchingResourcePatternResolver.getResources(anyString())).thenThrow(new IOException("test"));
          Set<Class<MockClass>> subTypesOf = packageScan.getSubTypesOf(path, MockClass.class);
          assertTrue(subTypesOf.isEmpty());
      }
      
      @Test
      void testGetTypesAnnotatedWithException() throws NoSuchFieldException, IllegalAccessException, IOException {
          setResolver();
          String path = AnnotationClass.class.getPackage().getName();
          when(pathMatchingResourcePatternResolver.getResources(anyString())).thenThrow(new IOException("test"));
          Set<Class<Object>> actual = packageScan.getTypesAnnotatedWith(path, TestScan.class);
          assertTrue(actual.isEmpty());
      }
      
      @Test
      void testClassVersionNotMatch() throws NoSuchFieldException, IllegalAccessException, IOException {
          setResolver();
          Resource resource = mock(Resource.class);
          byte[] testCase = new byte[8];
          testCase[7] = (byte) 64;
          InputStream inputStream = new ByteArrayInputStream(testCase);
          when(resource.getInputStream()).thenReturn(inputStream);
          String path = AnnotationClass.class.getPackage().getName();
          when(pathMatchingResourcePatternResolver.getResources(anyString())).thenReturn(new Resource[] {resource});
          Set<Class<MockClass>> subTypesOf = packageScan.getSubTypesOf(path, MockClass.class);
          assertTrue(subTypesOf.isEmpty());
      }
      
      private void setResolver() throws NoSuchFieldException, IllegalAccessException {
          Field field = DefaultPackageScan.class.getDeclaredField("resourcePatternResolver");
          field.setAccessible(true);
          field.set(packageScan, pathMatchingResourcePatternResolver);
      }
  }