From e662f3f10918bd18206c86e13e757f1f5a0b2150 Mon Sep 17 00:00:00 2001
From: wenshao <szujobs@hotmail.com>
Date: Sun, 26 Aug 2012 13:01:19 +0800
Subject: [PATCH 1/2] remove warnnings

---
 src/main/java/com/alibaba/druid/util/StringUtils.java | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/src/main/java/com/alibaba/druid/util/StringUtils.java b/src/main/java/com/alibaba/druid/util/StringUtils.java
index 6b5ef08567..7b8e7dabd2 100644
--- a/src/main/java/com/alibaba/druid/util/StringUtils.java
+++ b/src/main/java/com/alibaba/druid/util/StringUtils.java
@@ -15,12 +15,8 @@
  */
 package com.alibaba.druid.util;
 
-import java.util.ArrayList;
-import java.util.Collection;
 import java.util.LinkedHashMap;
-import java.util.List;
 import java.util.Map;
-import java.util.StringTokenizer;
 
 import com.alibaba.druid.support.logging.Log;
 import com.alibaba.druid.support.logging.LogFactory;

From 58742c2a0e615fd22b4e3c8e1acde1452912be0a Mon Sep 17 00:00:00 2001
From: wenshao <szujobs@hotmail.com>
Date: Sun, 26 Aug 2012 13:13:39 +0800
Subject: [PATCH 2/2] add testcase

---
 .../druid/bvt/utils/DruidWebUtilsTest.java    | 32 +++++++++++++
 .../druid/bvt/utils/HistogramTest.java        | 45 +++++++++++++++++++
 2 files changed, 77 insertions(+)
 create mode 100644 src/test/java/com/alibaba/druid/bvt/utils/DruidWebUtilsTest.java
 create mode 100644 src/test/java/com/alibaba/druid/bvt/utils/HistogramTest.java

diff --git a/src/test/java/com/alibaba/druid/bvt/utils/DruidWebUtilsTest.java b/src/test/java/com/alibaba/druid/bvt/utils/DruidWebUtilsTest.java
new file mode 100644
index 0000000000..000649c28c
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/bvt/utils/DruidWebUtilsTest.java
@@ -0,0 +1,32 @@
+package com.alibaba.druid.bvt.utils;
+
+import junit.framework.TestCase;
+
+import org.junit.Assert;
+import org.springframework.mock.web.MockServletContext;
+
+import com.alibaba.druid.util.DruidWebUtils;
+
+public class DruidWebUtilsTest extends TestCase {
+
+    public void test_getContextPath_2_5() throws Exception {
+        new DruidWebUtils(); //
+
+        MockServletContext context = new MockServletContext() {
+
+            public int getMajorVersion() {
+                return 2;
+            }
+
+            public int getMinorVersion() {
+                return 4;
+            }
+
+            public String getContextPath() {
+                throw new NoSuchMethodError();
+            }
+        };
+
+        Assert.assertNull(DruidWebUtils.getContextPath(context));
+    }
+}
diff --git a/src/test/java/com/alibaba/druid/bvt/utils/HistogramTest.java b/src/test/java/com/alibaba/druid/bvt/utils/HistogramTest.java
new file mode 100644
index 0000000000..032842f761
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/bvt/utils/HistogramTest.java
@@ -0,0 +1,45 @@
+package com.alibaba.druid.bvt.utils;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.util.Histogram;
+
+public class HistogramTest extends TestCase {
+
+    public void test_histo() throws Exception {
+        Histogram histo = Histogram.makeHistogram(4);
+        
+        Assert.assertEquals(4, histo.getRanges().length);
+
+        histo.record(0);
+        
+        histo.record(1);
+        histo.record(2);
+        
+        histo.record(11);
+        histo.record(12);
+        histo.record(13);
+        
+        histo.record(101);
+        histo.record(102);
+        histo.record(103);
+        histo.record(104);
+        
+        histo.record(1001);
+        histo.record(1002);
+        histo.record(1003);
+        histo.record(1004);
+        histo.record(1005);
+        
+        histo.record(10001);
+        
+        Assert.assertEquals(1, histo.get(0));
+        Assert.assertEquals(2, histo.get(1));
+        Assert.assertEquals(3, histo.get(2));
+        Assert.assertEquals(4, histo.get(3));
+        Assert.assertEquals(6, histo.get(4));
+        
+        histo.toString();
+    }
+}