fix(time-series table): display null values in time-series table and sortable (#19024)

* fix: display null values in time-series table and sortable

* add unit test

* fix unit test

* Add sortNumericValues with different nan treatment

Co-authored-by: Jesse Yang <jesse.yang@airbnb.com>

superset-frontend/src/utils/sortNumericValues.test.ts

@@ -0,0 +1,61 @@
+/**
+ * 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.
+ */
+import sortNumericValues from './sortNumericValues';
+
+test('should always sort null and NaNs to bottom', () => {
+  expect([null, 1, 2, '1', '5', NaN].sort(sortNumericValues)).toEqual([
+    1,
+    '1',
+    2,
+    '5',
+    NaN,
+    null,
+  ]);
+  expect(
+    [null, 1, 2, '1', '5', NaN].sort((a, b) =>
+      sortNumericValues(a, b, { descending: true }),
+    ),
+  ).toEqual(['5', 2, 1, '1', NaN, null]);
+});
+
+test('should treat null and NaN as smallest numbers', () => {
+  expect(
+    [null, 1, 2, '1', '5', NaN].sort((a, b) =>
+      sortNumericValues(a, b, { nanTreatment: 'asSmallest' }),
+    ),
+  ).toEqual([null, NaN, 1, '1', 2, '5']);
+  expect(
+    [null, 1, 2, '1', '5', NaN].sort((a, b) =>
+      sortNumericValues(a, b, { nanTreatment: 'asSmallest', descending: true }),
+    ),
+  ).toEqual(['5', 2, 1, '1', NaN, null]);
+});
+
+test('should treat null and NaN as largest numbers', () => {
+  expect(
+    [null, 1, 2, '1', '5', NaN].sort((a, b) =>
+      sortNumericValues(a, b, { nanTreatment: 'asLargest' }),
+    ),
+  ).toEqual([1, '1', 2, '5', NaN, null]);
+  expect(
+    [null, 1, 2, '1', '5', NaN].sort((a, b) =>
+      sortNumericValues(a, b, { nanTreatment: 'asLargest', descending: true }),
+    ),
+  ).toEqual([null, NaN, '5', 2, 1, '1']);
+});