/*
    * 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.maven.plugins.shade.filter;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.file.Files;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Set;
  import java.util.TreeSet;
  import java.util.jar.JarOutputStream;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.DefaultArtifact;
  import org.apache.maven.artifact.DependencyResolutionRequiredException;
  import org.apache.maven.model.Build;
  import org.apache.maven.plugin.logging.Log;
  import org.apache.maven.project.MavenProject;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  import org.mockito.ArgumentCaptor;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.fail;
  import static org.junit.Assume.assumeFalse;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.when;
  
  public class MinijarFilterTest {
  
      @Rule
      public TemporaryFolder tempFolder =
              TemporaryFolder.builder().assureDeletion().build();
  
      private File outputDirectory;
      private File emptyFile;
      private File jarFile;
      private Log log;
      private ArgumentCaptor<CharSequence> logCaptor;
  
      @Before
      public void init() throws IOException {
          this.outputDirectory = tempFolder.newFolder();
          this.emptyFile = tempFolder.newFile();
          this.jarFile = tempFolder.newFile();
          new JarOutputStream(Files.newOutputStream(this.jarFile.toPath())).close();
          this.log = mock(Log.class);
          logCaptor = ArgumentCaptor.forClass(CharSequence.class);
      }
  
      /**
       * This test will fail on JDK 7 because jdependency needs at least JDK 8.
       */
      @Test
      public void testWithMockProject() throws IOException {
          assumeFalse(
                  "Expected to run under JDK8+",
                  System.getProperty("java.version").startsWith("1.7"));
  
          MavenProject mavenProject = mockProject(outputDirectory, emptyFile);
  
          MinijarFilter mf = new MinijarFilter(mavenProject, log);
  
          mf.finished();
  
          verify(log, times(1)).info(logCaptor.capture());
  
          assertEquals("Minimized 0 -> 0", logCaptor.getValue());
      }
  
      @Test
      public void testWithPomProject() throws IOException {
          // project with pom packaging and no artifact.
          MavenProject mavenProject = mockProject(outputDirectory, null);
          mavenProject.setPackaging("pom");
  
          MinijarFilter mf = new MinijarFilter(mavenProject, log);
 
         mf.finished();
 
         verify(log, times(1)).info(logCaptor.capture());
 
         // verify no access to project's artifacts
         verify(mavenProject, times(0)).getArtifacts();
 
         assertEquals("Minimized 0 -> 0", logCaptor.getValue());
     }
 
     private MavenProject mockProject(File outputDirectory, File file, String... classPathElements) {
         MavenProject mavenProject = mock(MavenProject.class);
 
         Artifact artifact = mock(Artifact.class);
         when(artifact.getGroupId()).thenReturn("com");
         when(artifact.getArtifactId()).thenReturn("aid");
         when(artifact.getVersion()).thenReturn("1.9");
         when(artifact.getClassifier()).thenReturn("classifier1");
         when(artifact.getScope()).thenReturn(Artifact.SCOPE_COMPILE);
 
         when(mavenProject.getArtifact()).thenReturn(artifact);
 
         DefaultArtifact dependencyArtifact =
                 new DefaultArtifact("dep.com", "dep.aid", "1.0", "compile", "jar", "classifier2", null);
         dependencyArtifact.setFile(file);
 
         Set<Artifact> artifacts = new TreeSet<>();
         artifacts.add(dependencyArtifact);
 
         when(mavenProject.getArtifacts()).thenReturn(artifacts);
 
         when(mavenProject.getArtifact().getFile()).thenReturn(file);
 
         Build build = new Build();
         build.setOutputDirectory(outputDirectory.toString());
 
         List<String> classpath = new ArrayList<>();
         classpath.add(outputDirectory.toString());
         if (file != null) {
             classpath.add(file.toString());
         }
         classpath.addAll(Arrays.asList(classPathElements));
         when(mavenProject.getBuild()).thenReturn(build);
         try {
             when(mavenProject.getRuntimeClasspathElements()).thenReturn(classpath);
         } catch (DependencyResolutionRequiredException e) {
             fail("Encountered unexpected exception: " + e.getClass().getSimpleName() + ": " + e.getMessage());
         }
 
         return mavenProject;
     }
 
     @Test
     public void finsishedShouldProduceMessageForClassesTotalNonZero() {
         MinijarFilter m = new MinijarFilter(1, 50, log);
 
         m.finished();
 
         verify(log, times(1)).info(logCaptor.capture());
 
         assertEquals("Minimized 51 -> 1 (1%)", logCaptor.getValue());
     }
 
     @Test
     public void finishedShouldProduceMessageForClassesTotalZero() {
         MinijarFilter m = new MinijarFilter(0, 0, log);
 
         m.finished();
 
         verify(log, times(1)).info(logCaptor.capture());
 
         assertEquals("Minimized 0 -> 0", logCaptor.getValue());
     }
 }