MethodHandles: Add tests for MethodHandle.bindTo.

Test: make test-art-host
Bug: 30550796
Change-Id: I7e8bd8c8cae5f874f7743fd1a0a361875fcb997e

1 files changed, 39 insertions, 0 deletions

diff --git a/test/957-methodhandle-transforms/src/Main.java b/test/957-methodhandle-transforms/src/Main.java
index 6c977f4f34..3c6f119f4a 100644
--- a/test/957-methodhandle-transforms/src/Main.java
+++ b/test/957-methodhandle-transforms/src/Main.java
@@ -30,6 +30,7 @@ public class Main {
     testArrayElementSetter();
     testIdentity();
     testConstant();
+    testBindTo();
   }
 
   public static void testThrowException() throws Throwable {
@@ -669,6 +670,44 @@ public class Main {
     }
   }
 
+  public static void testBindTo() throws Throwable {
+    MethodHandle stringCharAt = MethodHandles.lookup().findVirtual(
+        String.class, "charAt", MethodType.methodType(char.class, int.class));
+
+    char value = (char) stringCharAt.invoke("foo", 0);
+    if (value != 'f') {
+      System.out.println("Unexpected value: " + value);
+    }
+
+    MethodHandle bound = stringCharAt.bindTo("foo");
+    value = (char) bound.invoke(0);
+    if (value != 'f') {
+      System.out.println("Unexpected value: " + value);
+    }
+
+    try {
+      stringCharAt.bindTo(new Object());
+      fail();
+    } catch (ClassCastException expected) {
+    }
+
+    bound = stringCharAt.bindTo(null);
+    try {
+      bound.invoke(0);
+      fail();
+    } catch (NullPointerException expected) {
+    }
+
+    MethodHandle integerParseInt = MethodHandles.lookup().findStatic(
+        Integer.class, "parseInt", MethodType.methodType(int.class, String.class));
+
+    bound = integerParseInt.bindTo("78452");
+    int intValue = (int) bound.invoke();
+    if (intValue != 78452) {
+      System.out.println("Unexpected value: " + intValue);
+    }
+  }
+
   public static void fail() {
     System.out.println("FAIL");
     Thread.dumpStack();