fix: Timeseries Y-axis format with contribution mode (#27106)

superset-frontend/plugins/plugin-chart-echarts/test/utils/formatters.test.ts

@@ -0,0 +1,37 @@
+/**
+ * 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 { NumberFormats } from '@superset-ui/core';
+import { getPercentFormatter } from '../../src/utils/formatters';
+
+describe('getPercentFormatter', () => {
+  const value = 0.6;
+  it('should format as percent if no format is specified', () => {
+    expect(getPercentFormatter().format(value)).toEqual('60%');
+  });
+  it('should format as percent if SMART_NUMBER is specified', () => {
+    expect(
+      getPercentFormatter(NumberFormats.SMART_NUMBER).format(value),
+    ).toEqual('60%');
+  });
+  it('should format using a provided format', () => {
+    expect(
+      getPercentFormatter(NumberFormats.PERCENT_2_POINT).format(value),
+    ).toEqual('60.00%');
+  });
+});