diff --git a/src/Utils-spec.ts b/src/Utils-spec.ts
index fc03bec9..0ec662c4 100644
--- a/src/Utils-spec.ts
+++ b/src/Utils-spec.ts
@@ -23,7 +23,7 @@ describe('Utils', () => {
     expect(Utils.stringify([{one: afoo, two: afoo}])).toBe('[{"one":{"a":"foo"}}]');
   });
 
-  it('should exclude properties', () => {
+  describe('stringify', () => {
     var user:any = {
       id:1,
       name: 'Blake',
@@ -37,11 +37,27 @@ describe('Utils', () => {
       }
     };
 
-    expect(Utils.stringify(user)).toBe(JSON.stringify(user));
-    expect(Utils.stringify(user, ['pAssword'])).toBe('{"id":1,"name":"Blake","passwordResetToken":"a reset token","myPasswordValue":"123456","myPassword":"123456","customValue":"Password","value":{}}');
-    expect(Utils.stringify(user, ['*password'])).toBe('{"id":1,"name":"Blake","myPasswordValue":"123456","myPassword":"123456","customValue":"Password","value":{}}');
-    expect(Utils.stringify(user, ['password*'])).toBe('{"id":1,"name":"Blake","passwordResetToken":"a reset token","myPasswordValue":"123456","customValue":"Password","value":{}}');
-    expect(Utils.stringify(user, ['*password*'])).toBe('{"id":1,"name":"Blake","customValue":"Password","value":{}}');
+    it('should behave like JSON.stringify', () => {
+      expect(Utils.stringify(user)).toBe(JSON.stringify(user));
+    });
+
+    describe('with exclude pattern', () => {
+      it('pAssword', () => {
+        expect(Utils.stringify(user, ['pAssword'])).toBe('{"id":1,"name":"Blake","passwordResetToken":"a reset token","myPasswordValue":"123456","myPassword":"123456","customValue":"Password","value":{}}');
+      });
+
+      it('*password', () => {
+        expect(Utils.stringify(user, ['*password'])).toBe('{"id":1,"name":"Blake","passwordResetToken":"a reset token","myPasswordValue":"123456","customValue":"Password","value":{}}');
+      });
+
+      it('password*', () => {
+        expect(Utils.stringify(user, ['password*'])).toBe('{"id":1,"name":"Blake","myPasswordValue":"123456","myPassword":"123456","customValue":"Password","value":{}}');
+      });
+
+      it('*password*', () => {
+        expect(Utils.stringify(user, ['*password*'])).toBe('{"id":1,"name":"Blake","customValue":"Password","value":{}}');
+      });
+    });
   });
 
   it('should stringify array', () => {
diff --git a/src/Utils.ts b/src/Utils.ts
index 9898d6fc..6b93db0b 100644
--- a/src/Utils.ts
+++ b/src/Utils.ts
@@ -133,15 +133,14 @@ export class Utils {
         pattern = pattern.substring(0, pattern.length - 1);
       }
 
-
       if (startsWithWildcard && endsWithWildcard)
         return value.indexOf(pattern) !== -1;
 
       if (startsWithWildcard)
-        return value.lastIndexOf(pattern, 0) !== -1;
+        return value.lastIndexOf(pattern) === (value.length - pattern.length);
 
       if (endsWithWildcard)
-        return value.lastIndexOf(pattern) === (value.length - pattern.length);
+        return value.indexOf(pattern) === 0;
 
       return value === pattern;
     }