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 org.apache.ambari.server.stack;
  
  import java.io.File;
  import java.io.InputStream;
  import java.net.URL;
  import java.util.Set;
  import java.util.regex.Pattern;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.networknt.schema.JsonSchema;
  import com.networknt.schema.JsonSchemaFactory;
  import com.networknt.schema.ValidationMessage;
  
  import junit.framework.Assert;
  
  /**
   * KerberosDescriptorTest tests the stack- and service-level descriptors for certain stacks
   * and services
   */
  @Category({category.KerberosTest.class})
  public class KerberosDescriptorTest {
    private static Logger LOG = LoggerFactory.getLogger(KerberosDescriptorTest.class);
  
    private static final Pattern PATTERN_KERBEROS_DESCRIPTOR_FILENAME = Pattern.compile("^kerberos(?:_preconfigure)?\\.json$");
  
    private static File stacksDirectory;
    private static File commonServicesDirectory;
  
    @BeforeClass
    public static void beforeClass() {
      URL rootDirectoryURL = KerberosDescriptorTest.class.getResource("/");
      Assert.assertNotNull(rootDirectoryURL);
  
      File resourcesDirectory = new File(new File(rootDirectoryURL.getFile()).getParentFile().getParentFile(), "src/main/resources");
      Assert.assertNotNull(resourcesDirectory);
      Assert.assertTrue(resourcesDirectory.canRead());
  
      stacksDirectory = new File(resourcesDirectory, "stacks");
      Assert.assertNotNull(stacksDirectory);
      Assert.assertTrue(stacksDirectory.canRead());
  
      commonServicesDirectory = new File(resourcesDirectory, "common-services");
      Assert.assertNotNull(commonServicesDirectory);
      Assert.assertTrue(commonServicesDirectory.canRead());
  
    }
  
    @Test
    public void testCommonServiceDescriptor() throws Exception {
      JsonSchema schema = getJsonSchemaFromPath("kerberos_descriptor_schema.json");
      Assert.assertTrue(visitFile(schema, commonServicesDirectory, true));
    }
  
    @Test
    public void testStackServiceDescriptor() throws Exception {
      JsonSchema schema = getJsonSchemaFromPath("kerberos_descriptor_schema.json");
      Assert.assertTrue(visitFile(schema, stacksDirectory, true));
    }
  
    private boolean visitFile(JsonSchema schema, File file, boolean previousResult) throws Exception {
  
      if (file.isDirectory()) {
        boolean currentResult = true;
  
        File[] files = file.listFiles();
        if (files != null) {
          for (File currentFile : files) {
            currentResult = visitFile(schema, currentFile, previousResult) && currentResult;
          }
        }
        return previousResult && currentResult;
      } else if (file.isFile()) {
        if (PATTERN_KERBEROS_DESCRIPTOR_FILENAME.matcher(file.getName()).matches()) {
          LOG.info("Validating " + file.getAbsolutePath());
  
          JsonNode node = getJsonNodeFromUrl(file.toURI().toURL().toExternalForm());
          Set<ValidationMessage> errors = schema.validate(node);
  
          if ((errors != null) && !errors.isEmpty()) {
            for (ValidationMessage message : errors) {
              LOG.error(message.getMessage());
            }
  
            return false;
          }
  
          return true;
        } else {
          return true;
        }
      }
  
      return previousResult;
    }
  
    private JsonNode getJsonNodeFromUrl(String url) throws Exception {
      ObjectMapper mapper = new ObjectMapper();
      return mapper.readTree(new URL(url));
    }
  
    private JsonSchema getJsonSchemaFromPath(String name) throws Exception {
      JsonSchemaFactory factory = new JsonSchemaFactory();
      InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream(name);
      return factory.getSchema(is);
    }
  }
  