ISSUE-291: fix substring issue with empty dot

Author: spullara

compiler/src/main/java/com/github/mustachejava/reflect/AbstractObjectHandler.java

@@ -10,7 +10,7 @@
 import java.util.Optional;
 
 
-abstract class AbstractObjectHandler implements ObjectHandler {
+public abstract class AbstractObjectHandler implements ObjectHandler {
 
   protected static final Object NOT_FOUND = new Object();
 
@@ -27,6 +27,7 @@ public Object coerce(Object object) {
     return object;
   }
 
+
   @Override
   public Writer falsey(Iteration iteration, Writer writer, Object object, List<Object> scopes) {
     if (object != null) {

compiler/src/main/java/com/github/mustachejava/reflect/BaseObjectHandler.java

@@ -66,6 +66,7 @@ protected AccessibleObject findMember(Class sClass, String name) {
   }
 
   private AccessibleObject findMemberOnClass(Class sClass, String name) {
+    if (name.isEmpty()) return null;
     AccessibleObject ao;
     try {
       ao = getMethod(sClass, name);

compiler/src/test/java/com/github/mustachejava/InterpreterTest.java

@@ -1298,6 +1298,16 @@ public void testInvalidDelimiters() {
     }
   }
 
+  public void testEmptyDot() {
+    MustacheFactory mf = createMustacheFactory();
+    StringWriter sw = new StringWriter();
+    Mustache mustache = mf.compile(new StringReader("{{No.}}"), "template");
+    Map<String, String> scope = new HashMap<>();
+    scope.put("No", "1");
+    mustache.execute(sw, scope);
+    System.out.println(sw);
+  }
+
   public void testTemplateFunction() throws IOException {
     MustacheFactory mf = createMustacheFactory();
     Mustache m = mf.compile(new StringReader("{{#i}}{{{test}}}{{f}}{{/i}}" +