feat(Perplexity Node): New node (#13604)

packages/nodes-base/nodes/Perplexity/test/chat/complete.test.ts

@@ -0,0 +1,55 @@
+import { NodeTestHarness } from '@nodes-testing/node-test-harness';
+import nock from 'nock';
+
+const credentials = {
+	perplexityApi: {
+		apiKey: 'test-api-key',
+		baseUrl: 'https://api.perplexity.ai',
+	},
+};
+
+describe('Perplexity Node - Chat Completions', () => {
+	beforeEach(() => {
+		nock.disableNetConnect();
+		nock('https://api.perplexity.ai')
+			.post('/chat/completions', (body) => {
+				return (
+					body?.model?.value === 'r1-1776' &&
+					body?.model?.mode === 'id' &&
+					Array.isArray(body?.messages) &&
+					body.messages.length === 3 &&
+					body.messages[0].role === 'user' &&
+					body.messages[1].role === 'assistant' &&
+					body.messages[2].role === 'user'
+				);
+			})
+			.reply(200, {
+				id: '6bb24c98-3071-4691-9a7b-dc4bc18c3c2c',
+				model: 'r1-1776',
+				created: 1743161086,
+				object: 'chat.completion',
+				usage: {
+					prompt_tokens: 4,
+					completion_tokens: 4,
+					total_tokens: 8,
+				},
+				choices: [
+					{
+						index: 0,
+						finish_reason: 'length',
+						message: {
+							role: 'assistant',
+							content: '<think>\nOkay,',
+						},
+					},
+				],
+			});
+	});
+
+	afterEach(() => {
+		nock.cleanAll();
+		nock.enableNetConnect();
+	});
+
+	new NodeTestHarness().setupTests({ credentials });
+});