chore: Rename helper method to validateTimestamp

Author: lqiu96

google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/QueryParameterValue.java

@@ -506,7 +506,7 @@ private static <T> String valueToStringOrNull(T value, StandardSQLTypeName type)
           // Timestamp passed as a String can support up picosecond precision, however,
           // DateTimeFormatter only supports nanosecond precision. Higher than nanosecond
           // requires a custom validator.
-          checkValidTimestamp((String) value);
+          validateTimestamp((String) value);
           return (String) value;
         }
         break;
@@ -549,7 +549,7 @@ private static <T> String valueToStringOrNull(T value, StandardSQLTypeName type)
    * @throws IllegalArgumentException if timestamp is invalid or exceeds picosecond precision
    */
   @VisibleForTesting
-  static void checkValidTimestamp(String timestamp) {
+  static void validateTimestamp(String timestamp) {
     // Match if there is greater than nanosecond precision (>9 fractional digits)
     Matcher matcher = ISO8601_TIMESTAMP_HIGH_PRECISION_PATTERN.matcher(timestamp);
     if (matcher.find()) {

google-cloud-bigquery/src/test/java/com/google/cloud/bigquery/QueryParameterValueTest.java

@@ -324,19 +324,18 @@ public void testTimestampWithFormatter() {
 
   @Test
   public void testTimestampFromString() {
-    //    QueryParameterValue value = QueryParameterValue.timestamp("2014-08-19
-    // 12:41:35.220000+00:00");
-    //    assertThat(value.getValue()).isEqualTo("2014-08-19 12:41:35.220000+00:00");
-    //    assertThat(value.getType()).isEqualTo(StandardSQLTypeName.TIMESTAMP);
-    //    assertThat(value.getArrayType()).isNull();
-    //    assertThat(value.getArrayValues()).isNull();
-    //
-    //    QueryParameterValue value1 =
-    //        QueryParameterValue.timestamp("2025-08-19 12:34:56.123456789+00:00");
-    //    assertThat(value1.getValue()).isEqualTo("2025-08-19 12:34:56.123456789+00:00");
-    //    assertThat(value1.getType()).isEqualTo(StandardSQLTypeName.TIMESTAMP);
-    //    assertThat(value1.getArrayType()).isNull();
-    //    assertThat(value1.getArrayValues()).isNull();
+    QueryParameterValue value = QueryParameterValue.timestamp("2014-08-19 12:41:35.220000+00:00");
+    assertThat(value.getValue()).isEqualTo("2014-08-19 12:41:35.220000+00:00");
+    assertThat(value.getType()).isEqualTo(StandardSQLTypeName.TIMESTAMP);
+    assertThat(value.getArrayType()).isNull();
+    assertThat(value.getArrayValues()).isNull();
+
+    QueryParameterValue value1 =
+        QueryParameterValue.timestamp("2025-08-19 12:34:56.123456789+00:00");
+    assertThat(value1.getValue()).isEqualTo("2025-08-19 12:34:56.123456789+00:00");
+    assertThat(value1.getType()).isEqualTo(StandardSQLTypeName.TIMESTAMP);
+    assertThat(value1.getArrayType()).isNull();
+    assertThat(value1.getArrayValues()).isNull();
 
     // The following test cases test more than nanosecond precision
     // 10 digits of precision (1 digit more than nanosecond)