test: Add unit testing to nodes (no-changelog) (#4890)

* 🧪 Add base for building unit testing within nodes

* Improve helper functions

* 🧪 If node test

* 🧪 Airtable node test

* 🧪 If node test improvements

* 🧪 Airtable node test improvements

* ♻️ cleanup node unit tests

* ♻️ refactor getting node result data to use helper method

* ⚡ removed unused variables

* ♻️ Helper to read json files

---------

Co-authored-by: Marcus <marcus@n8n.io>
Co-authored-by: Michael Kret <michael.k@radency.com>

packages/nodes-base/test/nodes/Airtable/Airtable.node.test.ts

@@ -0,0 +1,64 @@
+import { INodeType } from 'n8n-workflow';
+import { executeWorkflow } from '../ExecuteWorkflow';
+import * as Helpers from '../Helpers';
+import { WorkflowTestData } from '../types';
+import nock from 'nock';
+
+import { ManualTrigger } from '../../../nodes/ManualTrigger/ManualTrigger.node';
+import { Airtable } from '../../../nodes/Airtable/Airtable.node';
+
+const records = [
+	{
+		id: 'rec2BWBoyS5QsS7pT',
+		createdTime: '2022-08-25T08:22:34.000Z',
+		fields: {
+			name: 'Tim',
+			email: 'tim@email.com',
+		},
+	},
+];
+
+describe('Execute Airtable Node', () => {
+	beforeEach(() => {
+		nock.disableNetConnect();
+		nock('https://api.airtable.com/v0')
+			.get('/appIaXXdDqS5ORr4V/tbljyBEdYzCPF0NDh?pageSize=100')
+			.reply(200, { records });
+	});
+
+	afterEach(() => {
+		nock.restore();
+	});
+
+	const tests: Array<WorkflowTestData> = [
+		{
+			description: 'List Airtable Records',
+			input: {
+				workflowData: Helpers.readJsonFileSync('test/nodes/Airtable/workflow.json'),
+			},
+			output: {
+				nodeData: {
+					Airtable: [[...records]],
+				},
+			},
+		},
+	];
+
+	const nodes: INodeType[] = [new ManualTrigger(), new Airtable()];
+	const nodeTypes = Helpers.setup(nodes);
+
+	for (const testData of tests) {
+		test(testData.description, async () => {
+			// execute workflow
+			const { result } = await executeWorkflow(testData, nodeTypes);
+
+			// check if result node data matches expected test data
+			const resultNodeData = Helpers.getResultNodeData(result, testData);
+			resultNodeData.forEach(({ nodeName, resultData }) =>
+				expect(resultData).toEqual(testData.output.nodeData[nodeName]),
+			);
+
+			expect(result.finished).toEqual(true);
+		});
+	}
+});

packages/nodes-base/test/nodes/Airtable/workflow.json

@@ -0,0 +1,63 @@
+{
+	"meta": {
+		"instanceId": "104a4d08d8897b8bdeb38aaca515021075e0bd8544c983c2bb8c86e6a8e6081c"
+	},
+	"nodes": [
+		{
+			"parameters": {},
+			"id": "f857c37f-36c1-4c9c-9b5f-f6ef49db67e3",
+			"name": "On clicking 'execute'",
+			"type": "n8n-nodes-base.manualTrigger",
+			"typeVersion": 1,
+			"position": [
+				820,
+				380
+			]
+		},
+		{
+			"parameters": {
+				"operation": "list",
+				"application": {
+					"__rl": true,
+					"value": "https://airtable.com/appIaXXdDqS5ORr4V/tbljyBEdYzCPF0NDh/viwInsMdsxffad0aU",
+					"mode": "url",
+					"__regex": "https://airtable.com/([a-zA-Z0-9]{2,})"
+				},
+				"table": {
+					"__rl": true,
+					"value": "https://airtable.com/appIaXXdDqS5ORr4V/tbljyBEdYzCPF0NDh/viwInsMdsxffad0aU",
+					"mode": "url",
+					"__regex": "https://airtable.com/[a-zA-Z0-9]{2,}/([a-zA-Z0-9]{2,})"
+				},
+				"additionalOptions": {}
+			},
+			"id": "5654d3b3-fe83-4988-889b-94f107d41807",
+			"name": "Airtable",
+			"type": "n8n-nodes-base.airtable",
+			"typeVersion": 1,
+			"position": [
+				1020,
+				380
+			],
+			"credentials": {
+				"airtableApi": {
+					"id": "20",
+					"name": "Airtable account"
+				}
+			}
+		}
+	],
+	"connections": {
+		"On clicking 'execute'": {
+			"main": [
+				[
+					{
+						"node": "Airtable",
+						"type": "main",
+						"index": 0
+					}
+				]
+			]
+		}
+	}
+}