Failing test for lambda impl methods being treated the same way as de…

…fault methods

Reproduces #48

end-to-end-tests/src/test/java/net/orfjackal/retrolambda/test/DefaultMethodsTest.java

@@ -4,6 +4,7 @@
 
 package net.orfjackal.retrolambda.test;
 
+import net.orfjackal.retrolambda.test.anotherpackage.UsesLambdasInAnotherPackage;
 import org.apache.commons.lang.SystemUtils;
 import org.hamcrest.*;
 import org.junit.*;
@@ -444,7 +445,7 @@ public void lambdas_with_default_methods() {
     public void default_methods_with_lambdas() throws Exception {
         UsesLambdas obj = new UsesLambdas() {
         };
-        assertThat(obj.foo().call(), is("foo"));
+        assertThat(obj.stateless().call(), is("foo"));
     }
 
     @Test
@@ -455,15 +456,31 @@ public void default_methods_with_lambdas_that_capture_this() throws Exception {
     }
 
     private interface UsesLambdas {
-        default Callable<String> foo() {
+        default Callable<String> stateless() {
             return () -> "foo";
         }
 
         default Callable<String> captureThis() {
-            return () -> foo().call();
+            return () -> stateless().call();
         }
     }
 
+    /**
+     * Lambdas which capture this in default methods will generate the lambda implementation
+     * method as a private <em>instance</em> method. We must avoid copying those methods to
+     * the interface implementers as if they were default methods.
+     */
+    @Test
+    public void default_methods_with_lambdas_in_another_package() throws Exception {
+        System.out.println("DefaultMethodsTest.default_methods_with_lambdas_in_another_package");
+        UsesLambdasInAnotherPackage obj = new UsesLambdasInAnotherPackage() {
+        };
+        assertThat(obj.stateless().call(), is("foo"));
+        assertThat(obj.captureThis().call(), is("foo"));
+        assertThat("should contain only delegates to the two default methods",
+                obj.getClass().getDeclaredMethods(), arrayWithSize(2));
+    }
+
 
     /**
      * We're unable to backport default methods if we cannot modify the interface,

end-to-end-tests/src/test/java/net/orfjackal/retrolambda/test/anotherpackage/UsesLambdasInAnotherPackage.java

@@ -0,0 +1,18 @@
+// Copyright © 2013-2015 Esko Luontola <www.orfjackal.net>
+// This software is released under the Apache License 2.0.
+// The license text is at http://www.apache.org/licenses/LICENSE-2.0
+
+package net.orfjackal.retrolambda.test.anotherpackage;
+
+import java.util.concurrent.Callable;
+
+public interface UsesLambdasInAnotherPackage {
+
+    default Callable<String> stateless() {
+        return () -> "foo";
+    }
+
+    default Callable<String> captureThis() {
+        return () -> stateless().call();
+    }
+}