Set single sample as default

src/__test__/components/data-processing/data-integration/DataIntegration.test.jsx

@@ -1,7 +1,9 @@
 import React from 'react';
 import { Provider } from 'react-redux';
 import '__test__/test-utils/setupTests';
-import { screen, render, waitFor } from '@testing-library/react';
+import {
+  screen, render, waitFor, within,
+} from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import _ from 'lodash';
 import fake from '__test__/test-utils/constants';
@@ -204,4 +206,31 @@ describe('DataIntegration', () => {
     // The legend alert plot text should appear
     expect(screen.getByText(/We have hidden the plot legend, because it is too large and it interferes with the display of the plot/)).toBeInTheDocument();
   });
+
+  it('Renders the elbow plot by default when the experiment is single sample', async () => {
+    // Remove all sample other than the first one.
+    // This way, getIsUnisample() will detect the exp as unisample
+    const unisampleCellSetsData = _.cloneDeep(cellSetsData);
+    _.find(unisampleCellSetsData.cellSets, { key: 'sample' }).children.splice(1);
+
+    const mockSingleSampleApiResponses = {
+      ...generateDefaultMockAPIResponses(fake.EXPERIMENT_ID),
+      [`experiments/${fake.EXPERIMENT_ID}/cellSets$`]: () => promiseResponse(
+        JSON.stringify(unisampleCellSetsData),
+      ),
+    };
+
+    fetchMock
+      .mockReset()
+      .mockIf(/.*/, mockAPI(mockSingleSampleApiResponses));
+
+    storeState = makeStore();
+    await storeState.dispatch(loadBackendStatus(fake.EXPERIMENT_ID));
+    await storeState.dispatch(loadProcessingSettings(fake.EXPERIMENT_ID));
+    await storeState.dispatch(loadCellSets(fake.EXPERIMENT_ID));
+
+    await renderDataIntegration(storeState);
+
+    expect(screen.getByRole('radio', { name: 'Elbow plot showing principal components' })).toBeChecked();
+  });
 });

src/components/data-processing/ConfigureEmbedding/ConfigureEmbedding.jsx

@@ -7,7 +7,7 @@ import {
 } from 'antd';
 import SelectData from 'components/plots/styling/embedding-continuous/SelectData';
 
-import { isUnisample } from 'utils/experimentPredicates';
+import { getIsUnisample } from 'utils/experimentPredicates';
 
 import CategoricalEmbeddingPlot from 'components/plots/CategoricalEmbeddingPlot';
 import ContinuousEmbeddingPlot from 'components/plots/ContinuousEmbeddingPlot';
@@ -135,11 +135,11 @@ const ConfigureEmbedding = (props) => {
     const { loading, data: plotData, error } = cellMeta[colouring];
     const modifiedConfig = {
       ...config,
-      axes:{
+      axes: {
         ...config.axes,
         yAxisText: config.axes.yAxisText || plotColouring,
-      }
-    }
+      },
+    };
     return (
       <ViolinFilterPlot
         experimentId={experimentId}
@@ -406,7 +406,7 @@ const ConfigureEmbedding = (props) => {
       );
     }
 
-    if (plotColouring === 'sample' && cellSets.accessible && isUnisample(cellSets.hierarchy)
+    if (plotColouring === 'sample' && cellSets.accessible && getIsUnisample(cellSets.hierarchy)
     ) {
       return (
         <center>

src/components/data-processing/DataIntegration/DataIntegration.jsx

@@ -1,5 +1,5 @@
 import React, {
-  useState, useEffect, useRef, useCallback,
+  useState, useEffect, useRef, useCallback, useMemo,
 } from 'react';
 import { useSelector, useDispatch } from 'react-redux';
 import {
@@ -24,7 +24,7 @@ import ElbowPlot from 'components/plots/ElbowPlot';
 import { generateDataProcessingPlotUuid } from 'utils/generateCustomPlotUuid';
 import EmptyPlot from 'components/plots/helpers/EmptyPlot';
 import PlotStyling from 'components/plots/styling/PlotStyling';
-import { isUnisample } from 'utils/experimentPredicates';
+import { getIsUnisample } from 'utils/experimentPredicates';
 import PlotLegendAlert, { MAX_LEGEND_ITEMS } from 'components/plots/helpers/PlotLegendAlert';
 import CalculationConfig from './CalculationConfig';
 
@@ -33,9 +33,14 @@ const DataIntegration = (props) => {
   const {
     experimentId, onConfigChange, stepDisabled, stepHadErrors, disableDataIntegration,
   } = props;
-  const [selectedPlot, setSelectedPlot] = useState('embedding');
-  const [plot, setPlot] = useState(null);
+
   const cellSets = useSelector(getCellSets());
+
+  const isUnisample = useMemo(() => getIsUnisample(cellSets.hierarchy));
+
+  const [selectedPlot, setSelectedPlot] = useState(isUnisample ? 'elbow' : 'embedding');
+  const [plot, setPlot] = useState(null);
+
   const filterName = 'dataIntegration';
   const configureEmbeddingFilterName = 'configureEmbedding';
 
@@ -275,7 +280,7 @@ const DataIntegration = (props) => {
       );
     }
 
-    if ((selectedPlot === 'embedding' || selectedPlot === 'frequency') && cellSets.accessible && isUnisample(cellSets.hierarchy)
+    if ((selectedPlot === 'embedding' || selectedPlot === 'frequency') && cellSets.accessible && isUnisample
     ) {
       return (
         <center>

src/utils/experimentPredicates.js

@@ -1,4 +1,4 @@
-const isUnisample = (hierarchy) => hierarchy.find((rootNode) => rootNode.key === 'sample')?.children?.length === 1;
+const getIsUnisample = (hierarchy) => hierarchy.find((rootNode) => rootNode.key === 'sample')?.children?.length === 1;
 
 // eslint-disable-next-line import/prefer-default-export
-export { isUnisample };
+export { getIsUnisample };