[Lens] Trigger a filter action on click in datatable visualization

x-pack/plugins/lens/public/datatable_visualization/_visualization.scss

@@ -1,3 +1,14 @@
 .lnsDataTable {
   align-self: flex-start;
 }
+
+.lnsDataTable__filter {
+  opacity: 0;
+  transition: opacity 250ms ease-in-out;
+}
+
+.lnsDataTable__cell:hover  {
+  .lnsDataTable__filter {
+    opacity: 1;
+  }
+}

x-pack/plugins/lens/public/datatable_visualization/expression.test.tsx

@@ -0,0 +1,156 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import React from 'react';
+import { shallow } from 'enzyme';
+import { mountWithIntl } from 'test_utils/enzyme_helpers';
+import { datatable, DatatableComponent } from './expression';
+import { LensMultiTable } from '../types';
+import { DatatableProps } from './expression';
+import { createMockExecutionContext } from '../../../../../src/plugins/expressions/common/mocks';
+import { IFieldFormat } from '../../../../../src/plugins/data/public';
+import { IAggType } from 'src/plugins/data/public';
+const executeTriggerActions = jest.fn();
+
+function sampleArgs() {
+  const data: LensMultiTable = {
+    type: 'lens_multitable',
+    tables: {
+      l1: {
+        type: 'kibana_datatable',
+        columns: [
+          { id: 'a', name: 'a', meta: { type: 'count' } },
+          { id: 'b', name: 'b', meta: { type: 'date_histogram', aggConfigParams: { field: 'b' } } },
+          { id: 'c', name: 'c', meta: { type: 'cardinality' } },
+        ],
+        rows: [{ a: 10110, b: 1588024800000, c: 3 }],
+      },
+    },
+  };
+
+  const args: DatatableProps['args'] = {
+    title: 'My fanci metric chart',
+    columns: {
+      columnIds: ['a', 'b', 'c'],
+      type: 'lens_datatable_columns',
+    },
+  };
+
+  return { data, args };
+}
+
+describe('datatable_expression', () => {
+  describe('datatable renders', () => {
+    test('it renders with the specified data and args', () => {
+      const { data, args } = sampleArgs();
+      const result = datatable.fn(data, args, createMockExecutionContext());
+
+      expect(result).toEqual({
+        type: 'render',
+        as: 'lens_datatable_renderer',
+        value: { data, args },
+      });
+    });
+  });
+
+  describe('DatatableComponent', () => {
+    test('it renders the title and value', () => {
+      const { data, args } = sampleArgs();
+
+      expect(
+        shallow(
+          <DatatableComponent
+            data={data}
+            args={args}
+            formatFactory={x => x as IFieldFormat}
+            executeTriggerActions={executeTriggerActions}
+            getType={jest.fn()}
+          />
+        )
+      ).toMatchSnapshot();
+    });
+
+    test('it invokes executeTriggerActions with correct context on click on top value', () => {
+      const { args, data } = sampleArgs();
+
+      const wrapper = mountWithIntl(
+        <DatatableComponent
+          data={{
+            ...data,
+            dateRange: {
+              fromDate: new Date('2020-04-20T05:00:00.000Z'),
+              toDate: new Date('2020-05-03T05:00:00.000Z'),
+            },
+          }}
+          args={args}
+          formatFactory={x => x as IFieldFormat}
+          executeTriggerActions={executeTriggerActions}
+          getType={jest.fn(() => ({ type: 'buckets' } as IAggType))}
+        />
+      );
+
+      wrapper
+        .find('[data-test-subj="lensDatatableFilterOut"]')
+        .first()
+        .simulate('click');
+
+      expect(executeTriggerActions).toHaveBeenCalledWith('VALUE_CLICK_TRIGGER', {
+        data: {
+          data: [
+            {
+              column: 0,
+              row: 0,
+              table: data.tables.l1,
+              value: 10110,
+            },
+          ],
+          negate: true,
+        },
+        timeFieldName: undefined,
+      });
+    });
+
+    test('it invokes executeTriggerActions with correct context on click on timefield', () => {
+      const { args, data } = sampleArgs();
+
+      const wrapper = mountWithIntl(
+        <DatatableComponent
+          data={{
+            ...data,
+            dateRange: {
+              fromDate: new Date('2020-04-20T05:00:00.000Z'),
+              toDate: new Date('2020-05-03T05:00:00.000Z'),
+            },
+          }}
+          args={args}
+          formatFactory={x => x as IFieldFormat}
+          executeTriggerActions={executeTriggerActions}
+          getType={jest.fn(() => ({ type: 'buckets' } as IAggType))}
+        />
+      );
+
+      wrapper
+        .find('[data-test-subj="lensDatatableFilterFor"]')
+        .at(3)
+        .simulate('click');
+
+      expect(executeTriggerActions).toHaveBeenCalledWith('VALUE_CLICK_TRIGGER', {
+        data: {
+          data: [
+            {
+              column: 1,
+              row: 0,
+              table: data.tables.l1,
+              value: 1588024800000,
+            },
+          ],
+          negate: false,
+        },
+        timeFieldName: 'b',
+      });
+    });
+  });
+});