improve SQLEvalVisitor

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalBetweenTest.java

@@ -0,0 +1,22 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+
+public class EvalBetweenTest extends TestCase {
+    public void test_between() throws Exception {
+        Assert.assertEquals(false, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? between 1 and 3", 0));
+        Assert.assertEquals(true, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? between 1 and 3", 2));
+        Assert.assertEquals(false, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? between 1 and 3", 4));
+    }
+    
+    public void test_not_between() throws Exception {
+        Assert.assertEquals(true, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? not between 1 and 3", 0));
+        Assert.assertEquals(false, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? not between 1 and 3", 2));
+        Assert.assertEquals(true, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? not between 1 and 3", 4));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalConcatTest.java

@@ -0,0 +1,15 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+
+public class EvalConcatTest extends TestCase {
+    public void test_concat() throws Exception {
+        Assert.assertEquals("abcd", SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "concat(?, ?)", "ab", "cd"));
+        Assert.assertEquals("abcdef", SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "concat(?, ?, ?)", "ab", "cd", "ef"));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalInTest.java

@@ -0,0 +1,20 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+
+public class EvalInTest extends TestCase {
+    public void test_in() throws Exception {
+        Assert.assertEquals(false, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? IN (1, 2, 3)", 0));
+        Assert.assertEquals(true, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? IN (1, 2, 3)", 1));
+    }
+    
+    public void test_not_in() throws Exception {
+        Assert.assertEquals(true, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? NOT IN (1, 2, 3)", 0));
+        Assert.assertEquals(false, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? NOT IN (1, 2, 3)", 1));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalIsNullTest.java

@@ -0,0 +1,15 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+
+public class EvalIsNullTest extends TestCase {
+    public void test_null() throws Exception {
+        Assert.assertEquals(false, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? is null", 0));
+        Assert.assertEquals(true, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "? is null", (Object) null));
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/eval/EvalMethodNowTest.java

@@ -0,0 +1,16 @@
+package com.alibaba.druid.bvt.sql.eval;
+
+import java.util.Date;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
+import com.alibaba.druid.util.JdbcConstants;
+
+
+public class EvalMethodNowTest extends TestCase {
+    public void test_now() throws Exception {
+        Assert.assertEquals(true, SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "now()") instanceof Date);
+    }
+}