Reactive OAuth2 DSL Customizations

Fixes: gh-5855

oauth2/oauth2-core/src/test/java/org/springframework/security/oauth2/core/user/TestOAuth2Users.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2002-2018 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.security.oauth2.core.user;
+
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.AuthorityUtils;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * @author Rob Winch
+ */
+public class TestOAuth2Users {
+
+	public static DefaultOAuth2User create() {
+		List<GrantedAuthority> roles = AuthorityUtils.createAuthorityList("ROLE_USER");
+		String attrName = "username";
+		Map<String, Object> attributes = new HashMap<>();
+		attributes.put(attrName, "user");
+		return new DefaultOAuth2User(roles, attributes, attrName);
+	}
+}