feat(Convert to File Node): Add delimiter convert to csv (#11556)

packages/nodes-base/utils/__tests__/binary.test.ts

@@ -0,0 +1,92 @@
+import { mock } from 'jest-mock-extended';
+import type { IBinaryData, IExecuteFunctions, INodeExecutionData } from 'n8n-workflow';
+import { type WorkSheet, utils as xlsxUtils, write as xlsxWrite } from 'xlsx';
+
+import { convertJsonToSpreadsheetBinary } from '@utils/binary';
+
+jest.mock('xlsx', () => ({
+	utils: {
+		json_to_sheet: jest.fn(),
+	},
+	write: jest.fn(),
+}));
+
+describe('convertJsonToSpreadsheetBinary', () => {
+	const helpers = mock<IExecuteFunctions['helpers']>();
+	const executeFunctions = mock<IExecuteFunctions>({ helpers });
+	const items = [
+		{ json: { key1: 'value1', key2: 'value2' } },
+		{ json: { key1: 'value3', key2: 'value4' } },
+	] as INodeExecutionData[];
+	const mockSheet = mock<WorkSheet>();
+	const workBook = {
+		SheetNames: ['Sheet'],
+		Sheets: {
+			Sheet: mockSheet,
+		},
+	};
+	const mockBuffer = mock<Buffer>();
+	const mockBinaryData = mock<IBinaryData>({ id: 'binaryId' });
+
+	beforeEach(() => {
+		jest.clearAllMocks();
+		(xlsxUtils.json_to_sheet as jest.Mock).mockReturnValue(mockSheet);
+		(xlsxWrite as jest.Mock).mockReturnValue(mockBuffer);
+		helpers.prepareBinaryData.mockResolvedValue(mockBinaryData);
+	});
+
+	describe('for fileFormat xlsx', () => {
+		it('should convert from JSON', async () => {
+			const result = await convertJsonToSpreadsheetBinary.call(executeFunctions, items, 'xlsx', {});
+
+			expect(result).toEqual(mockBinaryData);
+			expect(xlsxUtils.json_to_sheet).toHaveBeenCalledWith(
+				items.map((item) => item.json),
+				undefined,
+			);
+			expect(xlsxWrite).toHaveBeenCalledWith(workBook, {
+				bookType: 'xlsx',
+				bookSST: false,
+				type: 'buffer',
+			});
+			expect(helpers.prepareBinaryData).toHaveBeenCalledWith(mockBuffer, 'spreadsheet.xlsx');
+		});
+	});
+
+	describe('for fileFormat csv', () => {
+		it('should convert from JSON', async () => {
+			const result = await convertJsonToSpreadsheetBinary.call(executeFunctions, items, 'csv', {});
+
+			expect(result).toEqual(mockBinaryData);
+			expect(xlsxUtils.json_to_sheet).toHaveBeenCalledWith(
+				items.map((item) => item.json),
+				undefined,
+			);
+			expect(xlsxWrite).toHaveBeenCalledWith(workBook, {
+				bookType: 'csv',
+				bookSST: false,
+				type: 'buffer',
+			});
+			expect(helpers.prepareBinaryData).toHaveBeenCalledWith(mockBuffer, 'spreadsheet.csv');
+		});
+
+		it('should handle custom delimiter', async () => {
+			const result = await convertJsonToSpreadsheetBinary.call(executeFunctions, items, 'csv', {
+				delimiter: ';',
+			});
+
+			expect(result).toEqual(mockBinaryData);
+			expect(xlsxUtils.json_to_sheet).toHaveBeenCalledWith(
+				items.map((item) => item.json),
+				undefined,
+			);
+			expect(xlsxWrite).toHaveBeenCalledWith(workBook, {
+				bookType: 'csv',
+				bookSST: false,
+				type: 'buffer',
+				FS: ';',
+			});
+			expect(helpers.prepareBinaryData).toHaveBeenCalledWith(mockBuffer, 'spreadsheet.csv');
+		});
+	});
+});