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packages/nodes-base/nodes/Google/Sheet/test/v2/node/read.test.ts

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+import type { IExecuteFunctions } from 'n8n-workflow';
+
+import { execute } from '../../../v2/actions/sheet/read.operation';
+import type { GoogleSheet } from '../../../v2/helpers/GoogleSheet';
+
+describe('Google Sheet - Read', () => {
+	let mockExecuteFunctions: Partial<IExecuteFunctions>;
+	let mockSheet: Partial<GoogleSheet>;
+
+	beforeEach(() => {
+		mockExecuteFunctions = {
+			getInputData: jest.fn().mockReturnValue([{ json: {} }]),
+			getNode: jest.fn().mockReturnValue({ typeVersion: 4.5 }),
+			getNodeParameter: jest.fn((param) => {
+				const mockParams: { [key: string]: unknown } = {
+					options: {},
+					'filtersUI.values': [],
+					combineFilters: 'AND',
+				};
+				return mockParams[param];
+			}),
+		} as Partial<IExecuteFunctions>;
+
+		mockSheet = {
+			getData: jest.fn().mockResolvedValue([
+				['Header1', 'Header2'],
+				['Value1', 'Value2'],
+			]),
+			lookupValues: jest.fn().mockResolvedValue([{ Header1: 'Value1', Header2: 'Value2' }]),
+			structureArrayDataByColumn: jest
+				.fn()
+				.mockReturnValue([{ Header1: 'Value1', Header2: 'Value2' }]),
+		};
+	});
+
+	test('should return structured sheet data when no filters are applied', async () => {
+		const result = await execute.call(
+			mockExecuteFunctions as IExecuteFunctions,
+			mockSheet as GoogleSheet,
+			'Sheet1',
+		);
+		expect(mockSheet.getData).toHaveBeenCalled();
+		expect(mockSheet.structureArrayDataByColumn).toHaveBeenCalled();
+		expect(result).toEqual([
+			{
+				json: { Header1: 'Value1', Header2: 'Value2' },
+				pairedItem: { item: 0 },
+			},
+		]);
+	});
+
+	test('should call lookupValues when filters are provided', async () => {
+		mockExecuteFunctions.getNodeParameter = jest.fn((param) => {
+			if (param === 'filtersUI.values') return [{ lookupColumn: 'Header1', lookupValue: 'Value1' }];
+			return '';
+		}) as unknown as IExecuteFunctions['getNodeParameter'];
+
+		const result = await execute.call(
+			mockExecuteFunctions as IExecuteFunctions,
+			mockSheet as GoogleSheet,
+			'Sheet1',
+		);
+		expect(mockSheet.lookupValues).toHaveBeenCalled();
+		expect(result).toEqual([
+			{
+				json: { Header1: 'Value1', Header2: 'Value2' },
+				pairedItem: { item: 0 },
+			},
+		]);
+	});
+
+	test('should return an empty array when sheet data is empty', async () => {
+		mockSheet.getData = jest.fn().mockResolvedValue([]);
+		const result = await execute.call(
+			mockExecuteFunctions as IExecuteFunctions,
+			mockSheet as GoogleSheet,
+			'Sheet1',
+		);
+		expect(result).toEqual([]);
+	});
+});