Add test for drain stack underflow.

raphw · raphw · commit 16b585727bb7 · 2022-01-14T20:08:25.000+01:00
diff --git a/byte-buddy-dep/src/test/java/net/bytebuddy/utility/visitor/StackAwareMethodVisitorTest.java b/byte-buddy-dep/src/test/java/net/bytebuddy/utility/visitor/StackAwareMethodVisitorTest.java
@@ -63,6 +63,13 @@ public void testDrainOrder() throws Exception {
         verifyNoMoreInteractions(this.methodVisitor);
     }
 
+    @Test
+    public void testDrainStackWithUnderflow() {
+        StackAwareMethodVisitor methodVisitor = new StackAwareMethodVisitor(this.methodVisitor, methodDescription);
+        assertThat(methodVisitor.drainStack(Opcodes.ISTORE, Opcodes.ILOAD, StackSize.SINGLE), is(0));
+        verifyZeroInteractions(this.methodVisitor);
+    }
+
     @Test
     public void testDrainRetainTopSingle() throws Exception {
         when(methodDescription.getStackSize()).thenReturn(42);
