test(pivot): Add grid pivot pipe spec

Author: dkamburov

projects/igniteui-angular/src/lib/grids/pivot-grid/pivot-grid.pipes.spec.ts

@@ -0,0 +1,68 @@
+import { IgxNumberSummaryOperand } from '../summaries/grid-summary';
+import { IPivotConfiguration } from './pivot-grid.interface';
+import { IgxPivotColumnPipe, IgxPivotRowPipe } from './pivot-grid.pipes';
+
+describe('Pivot pipes', () => {
+    // This pipe is a pure, stateless function so no need for BeforeEach
+    const rowPipe = new IgxPivotRowPipe();
+    const columnPipe = new IgxPivotColumnPipe();
+
+    const data = [
+        { ProductCategory: 'Clothing', UnitPrice: 12.81, SellerName: 'Stanley', Country: 'Bulgaria', Date: '01/01/2021', UnitsSold: 282 },
+        { ProductCategory: 'Clothing', UnitPrice: 49.57, SellerName: 'Elisa', Country: 'USA', Date: '01/05/2019', UnitsSold: 296 },
+        { ProductCategory: 'Bikes', UnitPrice: 3.56, SellerName: 'Lydia', Country: 'Uruguay', Date: '01/06/2020', UnitsSold: 68 },
+        { ProductCategory: 'Accessories', UnitPrice: 85.58, SellerName: 'David', Country: 'USA', Date: '04/07/2021', UnitsSold: 293 },
+        { ProductCategory: 'Components', UnitPrice: 18.13, SellerName: 'John', Country: 'USA', Date: '12/08/2021', UnitsSold: 240 },
+        { ProductCategory: 'Clothing', UnitPrice: 68.33, SellerName: 'Larry', Country: 'Uruguay', Date: '05/12/2020', UnitsSold: 456 },
+        { ProductCategory: 'Clothing', UnitPrice: 16.05, SellerName: 'Walter', Country: 'Bulgaria', Date: '02/19/2020', UnitsSold: 492 }
+    ];
+
+    const pivotConfigHierarchy: IPivotConfiguration = {
+        columns: [{
+            member: () => 'All',
+            enabled: true,
+            childLevels: [{
+                member: 'Country',
+                enabled: true,
+                childLevels: []
+            }]
+        }],
+        rows: [{
+            member: () => 'All',
+            enabled: true,
+            childLevels: [
+                {
+                    member: (d) => d.ProductCategory,
+                    enabled: true,
+                    childLevels: []
+                }
+            ]
+        }],
+        values: [
+            {
+                member: 'UnitsSold',
+                aggregate: IgxNumberSummaryOperand.sum,
+                enabled: true
+            }
+        ],
+        filters: null
+    };
+
+    it('transforms flat data to pivot data', () => {
+        const rowPipeResult = rowPipe.transform(data, pivotConfigHierarchy.rows, pivotConfigHierarchy.values);
+        const columnPipeResult = columnPipe.transform(rowPipeResult, pivotConfigHierarchy.columns, pivotConfigHierarchy.values);
+        expect(columnPipeResult).toEqual([
+            { field1: 'All', All: 1000, Bulgaria: 774, USA: 829, Uruguay: 524, level: 0, records: [
+                { field1: 'Clothing', Bulgaria: 774, USA: 296, Uruguay: 456, level: 1  },
+                { field1: 'Bikes', Uruguay: 68, level: 1  },
+                { field1: 'Accessories', USA: 293, level: 1  },
+                { field1: 'Components', USA: 240, level: 1  }
+            ] },
+            { field1: 'Clothing', All: 1000, Bulgaria: 774, USA: 296, Uruguay: 456, level: 1  },
+            { field1: 'Bikes', All: 1000, Uruguay: 68, level: 1  },
+            { field1: 'Accessories', All: 1000, USA: 293, level: 1  },
+            { field1: 'Components', All: 1000, USA: 240, level: 1  }
+        ]);
+    });
+
+});