package org.codehaus.gmavenplus.mojo;
   
   import org.apache.maven.artifact.DependencyResolutionRequiredException;
   import org.apache.maven.model.Build;
   import org.apache.maven.plugin.MojoExecutionException;
   import org.apache.maven.project.MavenProject;
   import org.apache.maven.shared.model.fileset.FileSet;
   import org.codehaus.gmavenplus.model.internal.Version;
   import org.codehaus.gmavenplus.util.ClassWrangler;
  import org.junit.Before;
  import org.junit.Test;
  import org.mockito.MockitoAnnotations;
  import org.mockito.Spy;
  
  import java.io.File;
  import java.lang.reflect.InvocationTargetException;
  import java.net.MalformedURLException;
  import java.util.TreeSet;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  import static org.mockito.Mockito.*;
  
  
  /**
   * @author Keegan Witt
   */
  public class GenerateStubsMojoTest {
      private static final String INTENTIONAL_EXCEPTION_MESSAGE = "Intentionally blowing up.";
  
      @Spy
      private GenerateStubsMojo generateStubsMojo;
  
      @Before
      public void setup() {
          MockitoAnnotations.openMocks(this);
          doReturn(new TreeSet<File>()).when(generateStubsMojo).getFiles(any(FileSet[].class), eq(false));
          doReturn(new TreeSet<File>()).when(generateStubsMojo).getStubs(any(File.class));
          generateStubsMojo.project = mock(MavenProject.class);
          generateStubsMojo.stubsOutputDirectory = mock(File.class);
          doReturn(mock(Build.class)).when(generateStubsMojo.project).getBuild();
          generateStubsMojo.classWrangler = mock(ClassWrangler.class);
          doReturn(new Version(1, 8, 2)).when(generateStubsMojo.classWrangler).getGroovyVersion();
      }
  
      @Test
      public void testCallsExpectedMethods() throws Exception {
          doReturn(true).when(generateStubsMojo).groovyVersionSupportsAction();
          doNothing().when(generateStubsMojo).doStubGeneration(anySet(), anyList(), any(File.class));
          generateStubsMojo.execute();
          verify(generateStubsMojo, times(1)).doStubGeneration(anySet(), anyList(), any(File.class));
      }
  
      @Test(expected = MojoExecutionException.class)
      public void testClassNotFoundExceptionThrowsMojoExecutionException() throws Exception {
          doReturn(true).when(generateStubsMojo).groovyVersionSupportsAction();
          doThrow(new ClassNotFoundException(INTENTIONAL_EXCEPTION_MESSAGE)).when(generateStubsMojo).doStubGeneration(anySet(), anyList(), any(File.class));
          generateStubsMojo.execute();
      }
  
      @Test(expected = MojoExecutionException.class)
      public void testInvocationTargetExceptionThrowsMojoExecutionException() throws Exception {
          doReturn(true).when(generateStubsMojo).groovyVersionSupportsAction();
          doThrow(new InvocationTargetException(mock(Exception.class), INTENTIONAL_EXCEPTION_MESSAGE)).when(generateStubsMojo).doStubGeneration(anySet(), anyList(), any(File.class));
          generateStubsMojo.execute();
      }
  
      @Test(expected = MojoExecutionException.class)
      public void testInstantiationExceptionThrowsMojoExecutionException() throws Exception {
          doReturn(true).when(generateStubsMojo).groovyVersionSupportsAction();
          doThrow(new InstantiationException(INTENTIONAL_EXCEPTION_MESSAGE)).when(generateStubsMojo).doStubGeneration(anySet(), anyList(), any(File.class));
          generateStubsMojo.execute();
      }
  
      @Test(expected = MojoExecutionException.class)
      public void testIllegalAccessExceptionThrowsMojoExecutionException() throws Exception {
          doReturn(true).when(generateStubsMojo).groovyVersionSupportsAction();
          doThrow(new IllegalAccessException(INTENTIONAL_EXCEPTION_MESSAGE)).when(generateStubsMojo).doStubGeneration(anySet(), anyList(), any(File.class));
          generateStubsMojo.execute();
      }
  
      @Test(expected = MojoExecutionException.class)
      public void testDependencyResolutionRequiredExceptionThrowsMojoExecutionException() throws Exception {
          doThrow(mock(DependencyResolutionRequiredException.class)).when(generateStubsMojo.project).getCompileClasspathElements();
          generateStubsMojo.execute();
      }
  
      @Test(expected = MojoExecutionException.class)
      public void testMalformedURLExceptionThrowsMojoExecutionException() throws Exception {
          doReturn(true).when(generateStubsMojo).groovyVersionSupportsAction();
          doThrow(new MalformedURLException(INTENTIONAL_EXCEPTION_MESSAGE)).when(generateStubsMojo).doStubGeneration(anySet(), anyList(), any(File.class));
          generateStubsMojo.execute();
      }
  
      @Test
      public void testGroovyVersionSupportsActionTrue() {
          doReturn(Version.parseFromString("1.5.0")).when(generateStubsMojo.classWrangler).getGroovyVersion();
          assertTrue(generateStubsMojo.groovyVersionSupportsAction());
      }
 
     @Test
     public void testGroovyVersionSupportsActionFalse() {
         doReturn(Version.parseFromString("1.0")).when(generateStubsMojo.classWrangler).getGroovyVersion();
         assertFalse(generateStubsMojo.groovyVersionSupportsAction());
     }
 
 }