[Backport 2.x] Add cypress tests for discover 2.0

cypress/fixtures/dashboard/opensearch_dashboards/query_enhancement/data.json.txt

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+{
+  "type": "doc",
+  "value": {
+    "id": "3",
+    "index": "timestamp-nanos",
+    "source": {
+      "timestamp": "2019-01-01T12:10:30.123456789Z"
+    },
+    "type": "_doc"
+  }
+}
+
+{
+  "type": "doc",
+  "value": {
+    "id": "4",
+    "index": "timestamp-nanos",
+    "source": {
+      "timestamp": "2019-01-01T12:10:30.123498765Z"
+    },
+    "type": "_doc"
+  }
+}

cypress/fixtures/dashboard/opensearch_dashboards/query_enhancement/data_with_index_pattern.json.txt

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+{
+  "type": "doc",
+  "value": {
+    "id": "index-pattern:timestamp-*",
+    "index": ".kibana",
+    "source": {
+      "index-pattern": {
+        "fields": "[{\"name\":\"_id\",\"type\":\"string\",\"esTypes\":[\"_id\"],\"count\":1,\"scripted\":false,\"searchable\":true,\"aggregatable\":true,\"readFromDocValues\":false},{\"name\":\"_index\",\"type\":\"string\",\"esTypes\":[\"_index\"],\"count\":0,\"scripted\":false,\"searchable\":true,\"aggregatable\":true,\"readFromDocValues\":false},{\"name\":\"_score\",\"type\":\"number\",\"count\":0,\"scripted\":false,\"searchable\":false,\"aggregatable\":false,\"readFromDocValues\":false},{\"name\":\"_source\",\"type\":\"_source\",\"esTypes\":[\"_source\"],\"count\":0,\"scripted\":false,\"searchable\":false,\"aggregatable\":false,\"readFromDocValues\":false},{\"name\":\"_type\",\"type\":\"string\",\"esTypes\":[\"_type\"],\"count\":0,\"scripted\":false,\"searchable\":true,\"aggregatable\":true,\"readFromDocValues\":false},{\"name\":\"timestamp\",\"type\":\"date\",\"esTypes\":[\"date\",\"date_nanos\"],\"count\":2,\"scripted\":false,\"searchable\":true,\"aggregatable\":true,\"readFromDocValues\":true}]",
+        "timeFieldName": "timestamp",
+        "title": "timestamp-*",
+        "fieldFormatMap": "{\"timestamp\":{\"id\":\"date_nanos\"}}"
+      },
+      "type": "index-pattern"
+    },
+    "type": "_doc"
+  }
+}
+
+{
+  "type": "doc",
+  "value": {
+    "id": "2",
+    "index": "timestamp-millis",
+    "source": {
+      "timestamp": "2019-01-01T12:10:30.124Z"
+    },
+    "type": "_doc"
+  }
+}
+
+{
+  "type": "doc",
+  "value": {
+    "id": "1",
+    "index": "timestamp-millis",
+    "source": {
+      "timestamp": "2019-01-01T12:10:30.123Z"
+    },
+    "type": "_doc"
+  }
+}
+
+{
+  "type": "doc",
+  "value": {
+    "id": "3",
+    "index": "timestamp-nanos",
+    "source": {
+      "timestamp": "2019-01-01T12:10:30.123456789Z"
+    },
+    "type": "_doc"
+  }
+}
+
+{
+  "type": "doc",
+  "value": {
+    "id": "4",
+    "index": "timestamp-nanos",
+    "source": {
+      "timestamp": "2019-01-02T12:10:30.123498765Z"
+    },
+    "type": "_doc"
+  }
+}

cypress/fixtures/dashboard/opensearch_dashboards/query_enhancement/mappings.json.txt

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+{
+  "type": "index",
+  "value": {
+    "aliases": {
+    },
+    "index": "timestamp-millis",
+    "mappings": {
+      "properties": {
+        "timestamp": {
+          "type": "date"
+        }
+      }
+    },
+    "settings": {
+      "index": {
+        "number_of_replicas": "1",
+        "number_of_shards": "1",
+        "codec": "best_compression"
+      }
+    }
+  }
+}
+
+{
+  "type": "index",
+  "value": {
+    "aliases": {
+    },
+    "index": "timestamp-nanos",
+    "mappings": {
+      "properties": {
+        "timestamp": {
+          "type": "date_nanos"
+        }
+      }
+    },
+    "settings": {
+      "index": {
+        "number_of_replicas": "1",
+        "number_of_shards": "1",
+        "codec": "best_compression"
+      }
+    }
+  }
+}

cypress/integration/core-opensearch-dashboards/opensearch-dashboards/apps/query_enhancement/dataset_navigator.spec.js

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+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+import {
+  MiscUtils,
+  TestFixtureHandler,
+} from '@opensearch-dashboards-test/opensearch-dashboards-test-library';
+import { CURRENT_TENANT } from '../../../../../utils/commands';
+import { clusterName, clusterConnection } from '../../../../../utils/constants';
+
+const miscUtils = new MiscUtils(cy);
+const testFixtureHandler = new TestFixtureHandler(
+  cy,
+  Cypress.env('openSearchUrl')
+);
+
+const indexSet = [
+  'logstash-2015.09.22',
+  'logstash-2015.09.21',
+  'logstash-2015.09.20',
+];
+
+describe('dataset navigator', { scrollBehavior: false }, () => {
+  before(() => {
+    CURRENT_TENANT.newTenant = 'global';
+    cy.fleshTenantSettings();
+  });
+
+  describe('empty state', () => {
+    it('no index pattern', function () {
+      // Go to the Discover page
+      miscUtils.visitPage(
+        `app/data-explorer/discover#/?_g=(filters:!(),time:(from:'2015-09-19T13:31:44.000Z',to:'2015-09-24T01:31:44.000Z'))`
+      );
+
+      cy.waitForLoaderNewHeader();
+      cy.getElementByTestId('discoverNoIndexPatterns');
+    });
+  });
+
+  describe('select indices', () => {
+    before(() => {
+      testFixtureHandler.importJSONMapping(
+        'cypress/fixtures/dashboard/opensearch_dashboards/query_enhancement/mappings.json.txt'
+      );
+
+      testFixtureHandler.importJSONDoc(
+        'cypress/fixtures/dashboard/opensearch_dashboards/query_enhancement/data.json.txt'
+      );
+
+      // Since default cluster is removed, need to create a data source connection
+      miscUtils.visitPage(
+        'app/management/opensearch-dashboards/dataSources/create'
+      );
+      cy.intercept('POST', '/api/saved_objects/data-source').as(
+        'createDataSourceRequest'
+      );
+      cy.getElementByTestId(`datasource_card_opensearch`).click();
+      cy.get('[name="dataSourceTitle"]').type(clusterName);
+      cy.get('[name="endpoint"]').type(clusterConnection);
+      cy.getElementByTestId('createDataSourceFormAuthTypeSelect').click();
+      cy.get(`button[id="no_auth"]`).click();
+
+      cy.getElementByTestId('createDataSourceButton').click();
+      cy.wait('@createDataSourceRequest').then((interception) => {
+        expect(interception.response.statusCode).to.equal(200);
+      });
+      cy.location('pathname', { timeout: 6000 }).should(
+        'include',
+        'app/management/opensearch-dashboards/dataSources'
+      );
+
+      // Go to the Discover page
+      miscUtils.visitPage(`app/data-explorer/discover#/`);
+
+      cy.waitForLoaderNewHeader();
+    });
+
+    it('with SQL as default language', function () {
+      cy.getElementByTestId(`datasetSelectorButton`).click();
+      cy.getElementByTestId(`datasetSelectorAdvancedButton`).click();
+      cy.get(`[title="Indexes"]`).click();
+      cy.get(`[title=${clusterName}]`).click();
+      cy.get(`[title="timestamp-nanos"]`).click();
+      cy.getElementByTestId('datasetSelectorNext').click();
+
+      cy.get(`[class="euiModalHeader__title"]`).should(
+        'contain',
+        'Step 2: Configure data'
+      );
+      // should have two options: SQL and PPL
+      cy.getElementByTestId('advancedSelectorLanguageSelect')
+        .get('option')
+        .should('have.length', 2);
+
+      //select SQL
+      cy.getElementByTestId('advancedSelectorLanguageSelect').select(
+        'OpenSearch SQL'
+      );
+      cy.getElementByTestId('advancedSelectorConfirmButton').click();
+
+      cy.waitForLoaderNewHeader();
+
+      // SQL should already be selected
+      cy.getElementByTestId('queryEditorLanguageSelector').should(
+        'contain',
+        'OpenSearch SQL'
+      );
+      cy.waitForLoaderNewHeader();
+
+      // SQL query should be executed and sending back result
+      cy.get(`[data-test-subj="queryResultCompleteMsg"]`).should('be.visible');
+
+      // Switch language to PPL
+      cy.setQueryLanguage('PPL');
+      cy.waitForLoaderNewHeader();
+      cy.get(`[data-test-subj="queryResultCompleteMsg"]`).should('be.visible');
+    });
+
+    it('with PPL as default language', function () {
+      cy.getElementByTestId(`datasetSelectorButton`).click();
+      cy.getElementByTestId(`datasetSelectorAdvancedButton`).click();
+      cy.get(`[title="Indexes"]`).click();
+      cy.get(`[title=${clusterName}]`).click();
+      cy.get(`[title="timestamp-nanos"]`).click();
+      cy.getElementByTestId('datasetSelectorNext').click();
+
+      cy.get(`[class="euiModalHeader__title"]`).should(
+        'contain',
+        'Step 2: Configure data'
+      );
+
+      //select PPL
+      cy.getElementByTestId('advancedSelectorLanguageSelect').select('PPL');
+
+      cy.getElementByTestId(`advancedSelectorTimeFieldSelect`).select(
+        'timestamp'
+      );
+      cy.getElementByTestId('advancedSelectorConfirmButton').click();
+
+      cy.waitForLoaderNewHeader();
+
+      // PPL should already be selected
+      cy.getElementByTestId('queryEditorLanguageSelector').should(
+        'contain',
+        'PPL'
+      );
+
+      const fromTime = 'Sep 19, 2018 @ 00:00:00.000';
+      const toTime = 'Sep 21, 2019 @ 00:00:00.000';
+      cy.setTopNavDate(fromTime, toTime);
+
+      cy.waitForLoaderNewHeader();
+
+      // Query should finish running with timestamp and finish time in the footer
+      cy.getElementByTestId('queryResultCompleteMsg').should('be.visible');
+      cy.getElementByTestId('queryEditorFooterTimestamp').should(
+        'contain',
+        'timestamp'
+      );
+
+      // Switch language to SQL
+      cy.setQueryLanguage('OpenSearch SQL');
+
+      cy.waitForLoaderNewHeader();
+      cy.getElementByTestId('queryResultCompleteMsg').should('be.visible');
+      cy.getElementByTestId('queryEditorFooterTimestamp').should(
+        'contain',
+        'timestamp'
+      );
+    });
+  });
+
+  describe('index pattern', () => {
+    it('create index pattern and select it', function () {
+      // import logstash functional
+      testFixtureHandler.importJSONDocIfNeeded(
+        indexSet,
+        'cypress/fixtures/dashboard/opensearch_dashboards/data_explorer/logstash/logstash.mappings.json.txt',
+        'cypress/fixtures/dashboard/opensearch_dashboards/data_explorer/logstash/logstash.json.txt'
+      );
+      testFixtureHandler.importJSONMapping(
+        'cypress/fixtures/dashboard/opensearch_dashboards/data_explorer/discover/discover.mappings.json.txt'
+      );
+
+      testFixtureHandler.importJSONDoc(
+        'cypress/fixtures/dashboard/opensearch_dashboards/data_explorer/discover/discover.json.txt'
+      );
+
+      // Go to the Discover page
+      miscUtils.visitPage(
+        `app/data-explorer/discover#/?_g=(filters:!(),time:(from:'2015-09-19T13:31:44.000Z',to:'2015-09-24T01:31:44.000Z'))`
+      );
+
+      cy.get(`[class~="datasetSelector__button"]`).click();
+      cy.getElementByTestId(`datasetOption-logstash-*`).click();
+
+      cy.waitForLoaderNewHeader();
+      cy.waitForSearch();
+      cy.verifyHitCount('14,004');
+    });
+  });
+
+  after(() => {
+    cy.deleteIndex('timestamp-nanos');
+    // delete the data source connection
+    miscUtils.visitPage('app/management/opensearch-dashboards/dataSources/');
+    cy.get(`[class="euiTableRowCell"]`).contains(clusterName).click();
+    cy.getElementByTestId('editDatasourceDeleteIcon').click();
+    cy.getElementByTestId('confirmModalConfirmButton').click();
+  });
+});