add ut and fix for string comparison

kyuubi-util-scala/src/main/scala/org/apache/kyuubi/util/MathUtils.scala

@@ -47,6 +47,10 @@ object MathUtils {
     case byteValue: Byte => byteValue >= 0
     case shortValue: Short => shortValue >= 0
     case charValue: Char => charValue >= 0
-    case _ => Try { o.toString.toDouble >= 0.0d }.isSuccess
+    case _ => try {
+      o.toString.toDouble >= 0.0d
+    } catch {
+      case _: Exception => false
+    }
   }
 }

kyuubi-util-scala/src/test/scala/org/apache/kyuubi/util/MathUtilsSuite.scala

@@ -0,0 +1,47 @@
+/*
+ * 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.kyuubi.util
+
+// scalastyle:off
+
+import org.apache.kyuubi.util.MathUtils.isNonNegativeNumber
+import org.scalatest.funsuite.AnyFunSuite
+// scalastyle:on
+
+// scalastyle:off
+class MathUtilsSuite extends AnyFunSuite {
+// scalastyle:on
+  test("check non-negative number") {
+    assert(isNonNegativeNumber(0))
+    assert(isNonNegativeNumber(0L))
+    assert(isNonNegativeNumber(0.0f))
+    assert(isNonNegativeNumber(0.0d))
+    assert(isNonNegativeNumber(Long.MaxValue))
+    assert(!isNonNegativeNumber(Long.MinValue))
+    assert(isNonNegativeNumber(Double.MaxValue))
+    assert(!isNonNegativeNumber(Double.MinValue))
+    assert(isNonNegativeNumber(Float.MaxValue))
+    assert(!isNonNegativeNumber(Float.MinValue))
+
+    assert(isNonNegativeNumber("1"))
+    assert(isNonNegativeNumber("1.23"))
+    assert(!isNonNegativeNumber("-1"))
+    assert(!isNonNegativeNumber("-1.23"))
+    assert(isNonNegativeNumber(" 1"))
+  }
+}