Test and fixes for invoke-interface on java.lang.Object methods.

Bug: 7614818

Change-Id: I704596cf3d36887e6d6d589cb3ec89e31d5b8901
diff --git a/test/022-interface/src/Main.java b/test/022-interface/src/Main.java
index 3c3c21a..9010c98 100644
--- a/test/022-interface/src/Main.java
+++ b/test/022-interface/src/Main.java
@@ -67,10 +67,31 @@
         };
     doObjectOverrideTests(o);
   }
+
+  private static interface SubInterface extends Cloneable, SubObjectOverridingInterface {
+  }
+
+  private static class SubInterfaceImpl implements SubInterface {
+    public int length() {
+      return 0;
+    }
+    public char charAt(int i) {
+      return '!';
+    }
+    public CharSequence subSequence(int s, int e) {
+      return "";
+    }
+  }
+
+  static String subObjectOverrideTests(SubInterface i) {
+    return i.toString();
+  }
+
   static void doObjectOverrideTests(ObjectOverridingInterface o) {
     check(o.equals(null));
     check(o.hashCode() == 0xC001D00D);
     check(o.toString().equals("Mallet's Mallet"));
+    check(subObjectOverrideTests(new SubInterfaceImpl()) != null);
     System.out.println("objectOverrideTests: SUCCESS");
   }
 }
diff --git a/test/022-interface/src/ObjectOverridingInterface.java b/test/022-interface/src/ObjectOverridingInterface.java
index a44cdf5..a9e0abd 100644
--- a/test/022-interface/src/ObjectOverridingInterface.java
+++ b/test/022-interface/src/ObjectOverridingInterface.java
@@ -20,4 +20,5 @@
 public interface ObjectOverridingInterface extends CharSequence {
   public boolean equals(Object o);
   public int hashCode();
+  public String toString();
 }
diff --git a/test/022-interface/src/SubObjectOverridingInterface.java b/test/022-interface/src/SubObjectOverridingInterface.java
new file mode 100644
index 0000000..7babdcd
--- /dev/null
+++ b/test/022-interface/src/SubObjectOverridingInterface.java
@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+public interface SubObjectOverridingInterface extends ObjectOverridingInterface {
+}