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    * 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
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    * 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.dependency.fromDependencies;
  
  import java.io.File;
  import java.util.Set;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.execution.MavenSession;
  import org.apache.maven.plugin.LegacySupport;
  import org.apache.maven.plugins.dependency.AbstractDependencyMojoTestCase;
  import org.apache.maven.plugins.dependency.utils.DependencyUtil;
  import org.apache.maven.project.MavenProject;
  
  public class TestBuildClasspathMojo extends AbstractDependencyMojoTestCase {
  
      private BuildClasspathMojo mojo;
  
      protected void setUp() throws Exception {
          // required for mojo lookups to work
          super.setUp("build-classpath", true);
  
          File testPom = new File(getBasedir(), "target/test-classes/unit/build-classpath-test/plugin-config.xml");
          mojo = (BuildClasspathMojo) lookupMojo("build-classpath", testPom);
  
          assertNotNull(mojo);
          assertNotNull(mojo.getProject());
      }
  
      /**
       * Tests the proper discovery and configuration of the mojo.
       */
      public void testEnvironment() throws Exception {
          MavenProject project = mojo.getProject();
  
          // mojo.silent = true;
          Set<Artifact> artifacts = this.stubFactory.getScopedArtifacts();
          Set<Artifact> directArtifacts = this.stubFactory.getReleaseAndSnapshotArtifacts();
          artifacts.addAll(directArtifacts);
  
          project.setArtifacts(artifacts);
          project.setDependencyArtifacts(directArtifacts);
  
          mojo.execute();
          try {
              mojo.readClasspathFile();
  
              fail("Expected an illegal Argument Exception");
          } catch (IllegalArgumentException e) {
              // expected to catch this.
          }
  
          mojo.setOutputFile(new File(testDir, "buildClasspath.txt"));
          mojo.execute();
  
          String file = mojo.readClasspathFile();
          assertNotNull(file);
          assertTrue(file.length() > 0);
  
          assertTrue(file.contains(File.pathSeparator));
          assertTrue(file.contains(File.separator));
  
          String fileSep = "#####";
          String pathSep = "%%%%%";
  
          mojo.setFileSeparator(fileSep);
          mojo.setPathSeparator(pathSep);
          mojo.execute();
  
          file = mojo.readClasspathFile();
          assertNotNull(file);
          assertTrue(file.length() > 0);
  
          assertFalse(file.contains(File.pathSeparator));
          assertFalse(file.contains(File.separator));
          assertTrue(file.contains(fileSep));
          assertTrue(file.contains(pathSep));
  
          String propertyValue = project.getProperties().getProperty("outputProperty");
          assertNull(propertyValue);
          mojo.setOutputProperty("outputProperty");
          mojo.execute();
          propertyValue = project.getProperties().getProperty("outputProperty");
         assertNotNull(propertyValue);
     }
 
     public void testPath() throws Exception {
         MavenSession session = newMavenSession(mojo.getProject());
         setVariableValueToObject(mojo, "session", session);
 
         LegacySupport legacySupport = lookup(LegacySupport.class);
         legacySupport.setSession(session);
         installLocalRepository(legacySupport);
 
         Artifact artifact = stubFactory.getReleaseArtifact();
 
         StringBuilder sb = new StringBuilder();
         mojo.setPrefix(null);
         mojo.setStripVersion(false);
         mojo.appendArtifactPath(artifact, sb);
         assertEquals(artifact.getFile().getPath(), sb.toString());
 
         mojo.setLocalRepoProperty("$M2_REPO");
         sb = new StringBuilder();
         mojo.appendArtifactPath(artifact, sb);
         assertEquals("$M2_REPO" + File.separator + artifact.getFile().getName(), sb.toString());
 
         mojo.setLocalRepoProperty("%M2_REPO%");
         sb = new StringBuilder();
         mojo.appendArtifactPath(artifact, sb);
         assertEquals("%M2_REPO%" + File.separator + artifact.getFile().getName(), sb.toString());
 
         mojo.setLocalRepoProperty("%M2_REPO%");
         sb = new StringBuilder();
         mojo.setPrependGroupId(true);
         mojo.appendArtifactPath(artifact, sb);
         assertEquals(
                 "If prefix is null, prependGroupId has no impact ",
                 "%M2_REPO%" + File.separator + DependencyUtil.getFormattedFileName(artifact, false, false),
                 sb.toString());
 
         mojo.setLocalRepoProperty("");
         mojo.setPrefix("prefix");
         sb = new StringBuilder();
         mojo.setPrependGroupId(true);
         mojo.appendArtifactPath(artifact, sb);
         assertEquals(
                 "prefix" + File.separator + DependencyUtil.getFormattedFileName(artifact, false, true), sb.toString());
         mojo.setPrependGroupId(false);
 
         mojo.setLocalRepoProperty("");
         mojo.setPrefix("prefix");
         sb = new StringBuilder();
         mojo.appendArtifactPath(artifact, sb);
         assertEquals("prefix" + File.separator + artifact.getFile().getName(), sb.toString());
 
         mojo.setPrefix("prefix");
         mojo.setStripVersion(true);
         sb = new StringBuilder();
         mojo.appendArtifactPath(artifact, sb);
         assertEquals("prefix" + File.separator + DependencyUtil.getFormattedFileName(artifact, true), sb.toString());
     }
 }