ZOOKEEPER-3613: ZKConfig fails to return proper value on getBoolean()when user accidentally includes spaces at the end of the value

Author: sujithsimon22 <sujith.abraham.simon@huawei.com>

Reviewers: Allan Lyu <fangmin@apache.org>,Justin Mao Ling <maoling199210191@sina.com>,Mohammad Arshad <arshad@apache.org>

Closes #1190 from sujithsimon22/3613

zookeeper-server/src/main/java/org/apache/zookeeper/common/ZKConfig.java

@@ -253,7 +253,7 @@ public class ZKConfig {
         if (propertyValue == null) {
             return defaultValue;
         } else {
-            return Boolean.parseBoolean(propertyValue);
+            return Boolean.parseBoolean(propertyValue.trim());
         }
     }
 

zookeeper-server/src/test/java/org/apache/zookeeper/common/ZKConfigTest.java

@@ -0,0 +1,96 @@
+/*
+ * 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.zookeeper.common;
+
+
+import static org.junit.Assert.assertEquals;
+import java.util.concurrent.TimeUnit;
+import org.junit.After;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.Timeout;
+
+
+
+public class ZKConfigTest {
+
+    X509Util x509Util = new ClientX509Util();
+
+    @Rule
+    public Timeout timeout = new Timeout(10, TimeUnit.SECONDS);
+
+    @After
+    public void tearDown() throws Exception {
+        System.clearProperty(x509Util.getSslProtocolProperty());
+    }
+
+    // property is not set we should get the default value
+    @Test
+    public void testBooleanRetrievalFromPropertyDefault() {
+        ZKConfig conf = new ZKConfig();
+        String prop = "UnSetProperty" + System.currentTimeMillis();
+        boolean defaultValue = false;
+        boolean result = conf.getBoolean(prop, defaultValue);
+        assertEquals(defaultValue, result);
+    }
+
+    // property is set to an valid boolean, we should get the set value
+    @Test
+    public void testBooleanRetrievalFromProperty() {
+        boolean value = true;
+        boolean defaultValue = false;
+        System.setProperty(x509Util.getSslProtocolProperty(), Boolean.toString(value));
+        ZKConfig conf = new ZKConfig();
+        boolean result = conf.getBoolean(x509Util.getSslProtocolProperty(), defaultValue);
+        assertEquals(value, result);
+    }
+
+    // property is set but with white spaces in the beginning
+    @Test
+    public void testBooleanRetrievalFromPropertyWithWhitespacesInBeginning() {
+        boolean value = true;
+        boolean defaultValue = false;
+        System.setProperty(x509Util.getSslProtocolProperty(), " " + value);
+        ZKConfig conf = new ZKConfig();
+        boolean result = conf.getBoolean(x509Util.getSslProtocolProperty(), defaultValue);
+        assertEquals(value, result);
+    }
+
+    // property is set but with white spaces at the end
+    @Test
+    public void testBooleanRetrievalFromPropertyWithWhitespacesAtEnd() {
+        boolean value = true;
+        boolean defaultValue = false;
+        System.setProperty(x509Util.getSslProtocolProperty(), value + " ");
+        ZKConfig conf = new ZKConfig();
+        boolean result = conf.getBoolean(x509Util.getSslProtocolProperty(), defaultValue);
+        assertEquals(value, result);
+    }
+
+    // property is set but with white spaces at the beginning and the end
+    @Test
+    public void testBooleanRetrievalFromPropertyWithWhitespacesAtBeginningAndEnd() {
+        boolean value = true;
+        boolean defaultValue = false;
+        System.setProperty(x509Util.getSslProtocolProperty(), " " + value + " ");
+        ZKConfig conf = new ZKConfig();
+        boolean result = conf.getBoolean(x509Util.getSslProtocolProperty(), defaultValue);
+        assertEquals(value, result);
+    }
+}