Add tests for SavedRequest redirects

web/src/main/java/org/apache/shiro/web/util/SavedRequest.java

@@ -60,6 +60,12 @@ public String getRequestURI() {
 
     public String getRequestUrl() {
         StringBuilder requestUrl = new StringBuilder(getRequestURI());
+
+        // remove duplicate leading slashes
+        while (requestUrl.length() > 1 && requestUrl.charAt(1) == '/') {
+            requestUrl.deleteCharAt(0);
+        }
+
         if (getQueryString() != null) {
             requestUrl.append("?").append(getQueryString());
         }

web/src/test/groovy/org/apache/shiro/web/util/SavedRequestTest.groovy

@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.apache.shiro.web.util
+
+import org.junit.Test
+
+import javax.servlet.http.HttpServletRequest
+import static org.hamcrest.MatcherAssert.assertThat
+import static org.hamcrest.Matchers.equalTo
+import static org.easymock.EasyMock.niceMock
+import static org.easymock.EasyMock.expect
+import static org.easymock.EasyMock.replay
+import static org.easymock.EasyMock.verify
+
+class SavedRequestTest {
+
+    @Test
+    void testGetRequestUrl() {
+        doTestGetRequestUrl("/foo//bar", "one=two&three=four", "/foo//bar?one=two&three=four")
+        doTestGetRequestUrl("///foo//bar", "one=two&three=four", "/foo//bar?one=two&three=four")
+        doTestGetRequestUrl("///foo//bar", "/foo//bar")
+        doTestGetRequestUrl("/foo", "/foo")
+        doTestGetRequestUrl("/", "one=two&three=four", "/?one=two&three=four")
+        doTestGetRequestUrl("/", "/")
+        doTestGetRequestUrl("//////", "/")
+        doTestGetRequestUrl("", "")
+    }
+
+    private static void doTestGetRequestUrl(String requestURI, String expected) {
+        doTestGetRequestUrl(requestURI, null, expected)
+    }
+
+    private static void doTestGetRequestUrl(String requestURI, String query, String expected) {
+        HttpServletRequest request = niceMock(HttpServletRequest)
+        expect(request.getRequestURI()).andReturn(requestURI)
+        expect(request.getQueryString()).andReturn(query)
+        replay request
+        assertThat new SavedRequest(request).getRequestUrl(), equalTo(expected)
+        verify request
+    }
+}