fix: line path with ordered xValues

integration/tests/line_stories.test.ts

@@ -42,4 +42,18 @@ describe('Line series stories', () => {
       );
     });
   });
+
+  describe('Line paths for ordered values', () => {
+    it('should render correct line path - non-stacked', async () => {
+      await common.expectChartAtUrlToMatchScreenshot(
+        'http://localhost:9001/?path=/story/line-chart--test-path-ordering&knob-enable orderOrdinalBinsBy=true&knob-Stacked=false',
+      );
+    });
+
+    it('should render correct line path - stacked', async () => {
+      await common.expectChartAtUrlToMatchScreenshot(
+        'http://localhost:9001/?path=/story/line-chart--test-path-ordering&knob-enable orderOrdinalBinsBy=true&knob-Stacked=true',
+      );
+    });
+  });
 });

src/chart_types/xy_chart/utils/fill_series.ts

@@ -20,7 +20,7 @@ import { SpecId } from '../../../utils/ids';
 import { DataSeries } from './series';
 
 /**
- *
+ * Fill missing x values in all data series
  * @param series
  * @param xValues
  * @internal

src/chart_types/xy_chart/utils/series.ts

@@ -31,7 +31,7 @@ import { splitSpecsByGroupId, YBasicSeriesSpec } from '../domains/y_domain';
 import { LastValues } from '../state/utils/types';
 import { applyFitFunctionToDataSeries } from './fit_function_utils';
 import { BasicSeriesSpec, SeriesTypes, SeriesSpecs, SeriesNameConfigOptions, StackMode } from './specs';
-import { formatStackedDataSeriesValues } from './stacked_series_utils';
+import { formatStackedDataSeriesValues, datumXSortPredicate } from './stacked_series_utils';
 
 /** @internal */
 export const SERIES_DELIMITER = ' - ';
@@ -329,6 +329,22 @@ function castToNumber(value: any, nonNumericValues: any[]): number | null {
   return num;
 }
 
+/**
+ * Sorts data based on order of xValues
+ * @param dataSeries
+ * @param xValues
+ * @param xScaleType
+ */
+const getSortedDataSeries = (
+  dataSeries: DataSeries[],
+  xValues: Set<string | number>,
+  xScaleType: ScaleType,
+): DataSeries[] =>
+  dataSeries.map(({ data, ...rest }) => ({
+    ...rest,
+    data: data.sort(datumXSortPredicate(xScaleType, [...xValues.values()])),
+  }));
+
 /** @internal */
 export function getFormattedDataseries(
   specs: YBasicSeriesSpec[],
@@ -359,8 +375,12 @@ export function getFormattedDataseries(
     const { stackMode } = groupSpecs;
     // format stacked data series
     const stackedDataSeries = getDataSeriesBySpecGroup(groupSpecs.stacked, availableDataSeries);
-    const fittedDataSeries = applyFitFunctionToDataSeries(stackedDataSeries.dataSeries, seriesSpecs, xScaleType);
-    const fittedAndStackedDataSeries = formatStackedDataSeriesValues(fittedDataSeries, xValues, stackMode);
+    const fittedStackedDataSeries = applyFitFunctionToDataSeries(
+      getSortedDataSeries(stackedDataSeries.dataSeries, xValues, xScaleType),
+      seriesSpecs,
+      xScaleType,
+    );
+    const fittedAndStackedDataSeries = formatStackedDataSeriesValues(fittedStackedDataSeries, xValues, stackMode);
 
     stackedFormattedDataSeries.push({
       groupId,
@@ -371,10 +391,15 @@ export function getFormattedDataseries(
 
     // format non stacked data series
     const nonStackedDataSeries = getDataSeriesBySpecGroup(groupSpecs.nonStacked, availableDataSeries);
+    const fittedNonStackedDataSeries = applyFitFunctionToDataSeries(
+      getSortedDataSeries(nonStackedDataSeries.dataSeries, xValues, xScaleType),
+      seriesSpecs,
+      xScaleType,
+    );
     nonStackedFormattedDataSeries.push({
       groupId,
       counts: nonStackedDataSeries.counts,
-      dataSeries: applyFitFunctionToDataSeries(nonStackedDataSeries.dataSeries, seriesSpecs, xScaleType),
+      dataSeries: fittedNonStackedDataSeries,
     });
   });
   return {
@@ -485,20 +510,23 @@ export function getDataSeriesBySpecId(
       globalXValues.add(xValue);
     }
   }
+
+  const xValues =
+    isOrdinalScale || !isNumberArray
+      ? getSortedOrdinalXValues(globalXValues, mutatedXValueSums, orderOrdinalBinsBy)
+      : new Set(
+          [...globalXValues].sort((a, b) => {
+            if (typeof a === 'string' || typeof b === 'string') {
+              return 0;
+            }
+            return a - b;
+          }),
+        );
+
   return {
     dataSeriesBySpecId,
     seriesCollection,
-    xValues:
-      isOrdinalScale || !isNumberArray
-        ? getSortedOrdinalXValues(globalXValues, mutatedXValueSums, orderOrdinalBinsBy)
-        : new Set(
-            [...globalXValues].sort((a, b) => {
-              if (typeof a === 'string' || typeof b === 'string') {
-                return 0;
-              }
-              return a - b;
-            }),
-          ),
+    xValues,
     fallbackScale: !isOrdinalScale && !isNumberArray ? ScaleType.Ordinal : undefined,
   };
 }

stories/line/10_test_path_ordering.tsx

@@ -0,0 +1,81 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. 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 { boolean } from '@storybook/addon-knobs';
+import React from 'react';
+
+import { Axis, LineSeries, Chart, Position, ScaleType, Settings, Direction } from '../../src';
+import { SB_SOURCE_PANEL } from '../utils/storybook';
+
+const data = [
+  // DestAirportID: Descending	Carrier: Descending	Max AvgTicketPrice	Average AvgTicketPrice	Test
+  { x: 'XIY', g: 'JetBeats', y1: 1195.87316894531, y2: 735.960746071555, z: 735.960746071555 },
+  { x: 'XIY', g: 'Kibana Airlines', y1: 1079.14624023438, y2: 742.831329345703, z: 742.831329345703 },
+  { x: 'XIY', g: 'ES-Air', y1: 929.561462402344, y2: 765.738806152344, z: 765.738806152344 },
+  { x: 'XIY', g: 'Logstash Airways', y1: 836.307922363281, y2: 487.398278808594, z: 487.398278808594 },
+  { x: 'XHBU', g: 'JetBeats', y1: 1193.38342285156, y2: 702.543407440186, z: 702.543407440186 },
+  { x: 'XHBU', g: 'Kibana Airlines', y1: 1159.03503417969, y2: 606.558886210124, z: 606.558886210124 },
+  { x: 'XHBU', g: 'ES-Air', y1: 996.849731445313, y2: 752.394683837891, z: 752.394683837891 },
+  { x: 'XHBU', g: 'Logstash Airways', y1: 909.167602539063, y2: 564.171913146973, z: 564.171913146973 },
+  { x: 'NGO', g: 'ES-Air', y1: 1189.08776855469, y2: 1189.08776855469, z: 1189.08776855469 },
+  { x: 'SCL', g: 'Logstash Airways', y1: 1176.63818359375, y2: 1031.0576171875, z: 1031.0576171875 },
+  { x: 'VE05', g: 'Kibana Airlines', y1: 1189.53845214844, y2: 563.195382859972, z: 563.195382859972 },
+  { x: 'VE05', g: 'Logstash Airways', y1: 998.839538574219, y2: 467.636221313477, z: 467.636221313477 },
+  { x: 'VE05', g: 'JetBeats', y1: 900.798461914063, y2: 569.146169026693, z: 569.146169026693 },
+  { x: 'VE05', g: 'ES-Air', y1: 820.462463378906, y2: 541.392608642578, z: 541.392608642578 },
+];
+
+export const Example = () => {
+  const orderOrdinalBinsBy = boolean('enable orderOrdinalBinsBy', true);
+
+  return (
+    <Chart className="story-chart">
+      <Settings
+        orderOrdinalBinsBy={
+          orderOrdinalBinsBy
+            ? {
+                direction: Direction.Descending,
+              }
+            : undefined
+        }
+      />
+      <Axis id="bottom" position={Position.Bottom} showOverlappingTicks />
+      <Axis id="left2" position={Position.Left} tickFormat={(d: any) => `$${Number(d).toFixed(2)}`} />
+
+      <LineSeries
+        id="bars1"
+        fit="linear"
+        xScaleType={ScaleType.Ordinal}
+        yScaleType={ScaleType.Linear}
+        xAccessor="x"
+        yAccessors={['y1', 'y2']}
+        splitSeriesAccessors={['g']}
+        stackAccessors={boolean('Stacked', true) ? ['g'] : undefined}
+        data={data}
+      />
+    </Chart>
+  );
+};
+
+// storybook configuration
+Example.story = {
+  parameters: {
+    options: { selectedPanel: SB_SOURCE_PANEL },
+  },
+};

stories/line/line.stories.tsx

@@ -35,3 +35,4 @@ export { Example as curvedWithAxisAndLegend } from './6_curved';
 export { Example as multipleWithAxisAndLegend } from './7_multiple';
 export { Example as stackedWithAxisAndLegend } from './8_stacked';
 export { Example as multiSeriesWithLogValues } from './9_multi_series';
+export { Example as testPathOrdering } from './10_test_path_ordering';