SEC-1492: Added RoleHierarchyAuthoritiesMapper as the new preferred way of using a RoleHierarchy.

core/src/test/java/org/springframework/security/access/hierarchicalroles/RoleHierarchyAuthoritiesMapperTests.java

@@ -0,0 +1,33 @@
+package org.springframework.security.access.hierarchicalroles;
+
+import static junit.framework.Assert.assertEquals;
+
+import org.junit.*;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.AuthorityUtils;
+
+import java.util.*;
+
+/**
+ * @author Luke Taylor
+ */
+public class RoleHierarchyAuthoritiesMapperTests {
+
+    @Test
+    public void expectedAuthoritiesAreReturned() {
+        RoleHierarchyImpl rh = new RoleHierarchyImpl();
+        rh.setHierarchy("ROLE_A > ROLE_B\nROLE_B > ROLE_C");
+        RoleHierarchyAuthoritiesMapper mapper = new RoleHierarchyAuthoritiesMapper(rh);
+
+        Collection<? extends GrantedAuthority> authorities =
+                mapper.mapAuthorities(AuthorityUtils.createAuthorityList("ROLE_A", "ROLE_D"));
+
+        assertEquals(4, authorities.size());
+
+        mapper = new RoleHierarchyAuthoritiesMapper(new NullRoleHierarchy());
+
+        authorities = mapper.mapAuthorities(AuthorityUtils.createAuthorityList("ROLE_A", "ROLE_D"));
+
+        assertEquals(2, authorities.size());
+    }
+}