package info.ebenoit.ebul.reflection;


import java.io.Serializable;
import java.util.ArrayList;

import org.junit.Assert;
import org.junit.Test;



/**
 * Tests for the {@link PackageScanner} class
 *
 * @author <a href="mailto:ebenoit@ebenoit.info">E. Benoît</a>
 */
public class TestPackageScanner
{

	/** Test: list the class names in the test package, without recursion */
	@Test
	public void testGetClassNamesNoRecursion( )
			throws Exception
	{
		final PackageScanner scanner = new PackageScanner( "test" , false );
		final ArrayList< String > result = scanner.getClassNames( );

		final ArrayList< String > expected = new ArrayList< >( );
		expected.add( "test.PSTest1" );

		Assert.assertEquals( expected , result );
	}


	/** Test: list the class names in the test package, with recursion into test.sub */
	@Test
	public void testGetClassNamesRecursion( )
			throws Exception
	{
		final PackageScanner scanner = new PackageScanner( "test" , true );
		final ArrayList< String > result = scanner.getClassNames( );
		result.sort( ( final String a , final String b ) -> a.compareTo( b ) );

		final ArrayList< String > expected = new ArrayList< >( );
		expected.add( "test.PSTest1" );
		expected.add( "test.sub.PSTest2" );

		Assert.assertEquals( expected , result );
	}


	/** Test: load all classes in test and test.sub */
	@Test
	public void testLoadClasses( )
			throws Exception
	{
		final PackageScanner scanner = new PackageScanner( "test" , true );
		final ArrayList< Class< ? > > result = scanner.loadClasses( );
		result.sort( ( final Class< ? > a , final Class< ? > b ) -> a.getCanonicalName( )
				.compareTo( b.getCanonicalName( ) ) );

		final ArrayList< Class< ? > > expected = new ArrayList< >( );
		expected.add( test.PSTest1.class );
		expected.add( test.sub.PSTest2.class );

		Assert.assertEquals( expected , result );
	}


	/** Test: find classes in test and test.sub that implement {@link Serializable} */
	@Test
	public void testFindClasses( )
			throws Exception
	{
		final PackageScanner scanner = new PackageScanner( "test" , true );
		final ArrayList< Class< ? > > result = scanner.findClasses( a -> Serializable.class.isAssignableFrom( a ) );

		final ArrayList< Class< ? > > expected = new ArrayList< >( );
		expected.add( test.sub.PSTest2.class );

		Assert.assertEquals( expected , result );
	}


	/** Test: list the class names in the org.junit package, without recursion */
	@Test
	public void testGetClassNamesJARNoRecursion( )
			throws Exception
	{
		final PackageScanner scanner = new PackageScanner( "org.junit" , false );
		final ArrayList< String > result = scanner.getClassNames( );

		Assert.assertTrue( !result.isEmpty( ) );
		Assert.assertTrue( result.stream( ).allMatch( s -> s.startsWith( "org.junit." ) ) );
		Assert.assertTrue( result.stream( ).noneMatch( s -> s.startsWith( "org.junit.experimental." ) ) );
	}


	/** Test: list the class names in the org.junit package, with recursion */
	@Test
	public void testGetClassNamesJARRecursion( )
			throws Exception
	{
		final PackageScanner scanner = new PackageScanner( "org.junit" , true );
		final ArrayList< String > result = scanner.getClassNames( );

		Assert.assertTrue( !result.isEmpty( ) );
		Assert.assertTrue( result.stream( ).allMatch( s -> s.startsWith( "org.junit." ) ) );
		Assert.assertTrue( result.stream( ).anyMatch( s -> s.startsWith( "org.junit.experimental." ) ) );
	}


	/**
	 * Test: list the class names in the org package, with recursion; both JUnit's classes and the PSTest3 class should
	 * be in there
	 */
	@Test
	public void testGetClassNamesMixed( )
			throws Exception
	{
		final PackageScanner scanner = new PackageScanner( "org" , true );
		final ArrayList< String > result = scanner.getClassNames( );

		Assert.assertTrue( !result.isEmpty( ) );
		Assert.assertTrue( result.stream( ).anyMatch( s -> s.startsWith( "org.junit." ) ) );
		Assert.assertTrue( result.contains( "org.PSTest3" ) );
	}
}