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.kafka.shell.glob;
  
  import org.apache.kafka.image.node.MetadataNode;
  import org.apache.kafka.shell.glob.GlobVisitor.MetadataNodeInfo;
  import org.apache.kafka.shell.state.MetadataShellState;
  
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.Timeout;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Optional;
  import java.util.function.Consumer;
  
  import static java.util.concurrent.TimeUnit.MINUTES;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  @Timeout(value = 5, unit = MINUTES)
  public class GlobVisitorTest {
      private static final MetadataShellState DATA;
  
      static class TestNode implements MetadataNode {
          private final String name;
  
          private final Map<String, TestNode> children;
  
          private final boolean isDirectory;
  
          TestNode(String name, boolean isDirectory) {
              this.name = name;
              this.children = new HashMap<>();
              this.isDirectory = isDirectory;
          }
  
          TestNode(String name, TestNode... children) {
              this.name = name;
              this.children = new HashMap<>();
              for (TestNode child : children) {
                  this.children.put(child.name, child);
              }
              this.isDirectory = true;
          }
  
          @Override
          public boolean isDirectory() {
              return isDirectory;
          }
  
          @Override
          public Collection<String> childNames() {
              return children.keySet();
          }
  
          @Override
          public MetadataNode child(String name) {
              return children.get(name);
          }
      }
  
      static {
          DATA = new MetadataShellState();
          DATA.setRoot(new TestNode("",
              new TestNode("alpha",
                  new TestNode("beta",
                      new TestNode("gamma")
                  ),
                  new TestNode("theta")
              ),
              new TestNode("foo",
                  new TestNode("a"),
                  new TestNode("beta")
              ),
              new TestNode("zeta",
                  new TestNode("c", false)
              ),
              new TestNode("zzz")
          ));
          DATA.setWorkingDirectory("foo");
      }
  
      static class InfoConsumer implements Consumer<Optional<MetadataNodeInfo>> {
          private Optional<List<MetadataNodeInfo>> infos = Optional.empty();
  
          @Override
          public void accept(Optional<MetadataNodeInfo> info) {
              if (infos.isEmpty()) {
                  if (info.isPresent()) {
                      infos = Optional.of(new ArrayList<>());
                      infos.get().add(info.get());
                  } else {
                      infos = Optional.empty();
                  }
              } else {
                  if (info.isPresent()) {
                      infos.get().add(info.get());
                  } else {
                      throw new RuntimeException("Saw non-empty info after seeing empty info");
                  }
              }
          }
      }
  
      @Test
      public void testStarGlob() {
          InfoConsumer consumer = new InfoConsumer();
          GlobVisitor visitor = new GlobVisitor("*", consumer);
          visitor.accept(DATA);
          assertEquals(Optional.of(List.of(
              new MetadataNodeInfo(new String[] {"foo", "a"},
                  DATA.root().child("foo").child("a")),
              new MetadataNodeInfo(new String[] {"foo", "beta"},
                  DATA.root().child("foo").child("beta")))), consumer.infos);
      }
  
      @Test
      public void testDotDot() {
          InfoConsumer consumer = new InfoConsumer();
          GlobVisitor visitor = new GlobVisitor("..", consumer);
          visitor.accept(DATA);
          assertEquals(Optional.of(List.of(
              new MetadataNodeInfo(new String[0], DATA.root()))), consumer.infos);
      }
  
      @Test
      public void testDoubleDotDot() {
          InfoConsumer consumer = new InfoConsumer();
          GlobVisitor visitor = new GlobVisitor("../..", consumer);
          visitor.accept(DATA);
          assertEquals(Optional.of(List.of(
              new MetadataNodeInfo(new String[0], DATA.root()))), consumer.infos);
      }
  
      @Test
      public void testZGlob() {
          InfoConsumer consumer = new InfoConsumer();
          GlobVisitor visitor = new GlobVisitor("../z*", consumer);
          visitor.accept(DATA);
          assertEquals(Optional.of(List.of(
              new MetadataNodeInfo(new String[] {"zeta"},
                  DATA.root().child("zeta")),
              new MetadataNodeInfo(new String[] {"zzz"},
                  DATA.root().child("zzz")))), consumer.infos);
      }
  
      @Test
      public void testBetaOrThetaGlob() {
          InfoConsumer consumer = new InfoConsumer();
          GlobVisitor visitor = new GlobVisitor("../*/{beta,theta}", consumer);
          visitor.accept(DATA);
          assertEquals(Optional.of(List.of(
              new MetadataNodeInfo(new String[] {"alpha", "beta"},
                  DATA.root().child("alpha").child("beta")),
              new MetadataNodeInfo(new String[] {"alpha", "theta"},
                  DATA.root().child("alpha").child("theta")),
              new MetadataNodeInfo(new String[] {"foo", "beta"},
                  DATA.root().child("foo").child("beta")))), consumer.infos);
      }
  
      @Test
      public void testNotFoundGlob() {
          InfoConsumer consumer = new InfoConsumer();
          GlobVisitor visitor = new GlobVisitor("epsilon", consumer);
          visitor.accept(DATA);
          assertEquals(Optional.empty(), consumer.infos);
      }
  
      @Test
      public void testAbsoluteGlob() {
          InfoConsumer consumer = new InfoConsumer();
          GlobVisitor visitor = new GlobVisitor("/a?pha", consumer);
          visitor.accept(DATA);
          assertEquals(Optional.of(List.of(
              new MetadataNodeInfo(new String[]{"alpha"},
                  DATA.root().child("alpha")))), consumer.infos);
      }
  }
  