Added tests for ExtensionMethod

test/transform/resource/before/ExtensionMethodAutoboxing.java

@@ -0,0 +1,23 @@
+import lombok.experimental.ExtensionMethod;
+
+@ExtensionMethod({ExtensionMethodAutoboxing.Extensions.class})
+class ExtensionMethodAutoboxing {
+	public void test() {
+		Long l1 = 1l;
+		long l2 = 1l;
+		Integer i1 = 1;
+		int i2 = 1;
+		
+		String string = "test";
+		string.boxing(l1, i1);
+		string.boxing(l1, i2);
+		string.boxing(l2, i1);
+		string.boxing(l2, i2);
+	}
+	
+	static class Extensions {
+		public static String boxing(String string, Long a, int b) {
+			return string + " " + a + " " + b;
+		}
+	}
+}