test/langtools/tools/javac/lambda/methodReferenceExecution/MethodReferenceIntersectionInducedTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 8191655
 * @summary LambdaConversionException: Invalid receiver type interface; not a subtype of implementation type interface
 * @run main MethodReferenceIntersectionInducedTest
 */


import java.util.function.Consumer;
public class MethodReferenceIntersectionInducedTest {
   static String blah;
   <T> void forAll(Consumer<T> consumer, T... values) { consumer.accept(values[0]); }

   public void secondTest() {
       forAll(Picture::draw, new MyPicture(), new Universal());
   }

   interface Shape { void draw(); }
   interface Marker { }
   interface Picture { void draw(); }

   class MyShape implements Marker, Shape { public void draw() { } }
   class MyPicture implements Marker, Picture { public void draw() { blah = "MyPicture"; } }
   class Universal implements Marker, Picture, Shape { public void draw() { System.out.println("Universal"); } }

   public static void main(String[] args) {
       new MethodReferenceIntersectionInducedTest().secondTest();
       if (!blah.equals("MyPicture"))
            throw new AssertionError("Incorrect output");
   }
}