testdata for IDEA-153999

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/newLambda/IDEA153999.java

@@ -0,0 +1,59 @@
+import java.util.Optional;
+import java.util.function.Function;
+
+class OptionTest2 {
+  interface Multi {
+
+    String yo();
+
+    default <R> R match(Function<? super T1,? extends R> t1func,
+                        Function<? super T2,? extends R> t2func,
+                        Function<? super T3,? extends R> t3func) {
+      if (this instanceof T1) {
+        return t1func.apply((T1) this);
+      } else if (this instanceof T2) {
+        return t2func.apply((T2) this);
+      } else if (this instanceof T3) {
+        return t3func.apply((T3) this);
+      } else {
+        throw new RuntimeException("Whoa!");
+      }
+    }
+
+    class T1 implements Multi {
+      public String yo() {
+        return "T1";
+      }
+    }
+
+    class T2 implements Multi {
+      public String yo() {
+        return "T2";
+      }
+    }
+
+    class T3 implements Multi {
+      public String yo() {
+        return "T3";
+      }
+    }
+  }
+
+
+  {
+    String result = new Multi.T1().match(
+      Optional::of,
+      Optional::of,
+      t3 -> Optional.<Multi>empty()
+    ).map(Multi::yo).orElse("Nope");
+
+    assertEquals("T1", result);
+
+    assertEquals("2", new Multi.T2().match(
+      t1 -> "1",
+      t2 -> "2",
+      Multi.T3::yo));
+  }
+
+  static void assertEquals(Object o, Object o1) {}
+}