server/packages/log-manager/tests/log-manager.test.ts

// FILEPATH: /home/jessew/Dev/lysand/packages/log-manager/log-manager.test.ts
import { LogManager, LogLevel, MultiLogManager } from "../index";
import type fs from "fs/promises";
import {
	describe,
	it,
	beforeEach,
	expect,
	jest,
	mock,
	type Mock,
	test,
} from "bun:test";
import type { BunFile } from "bun";

describe("LogManager", () => {
	let logManager: LogManager;
	let mockOutput: BunFile;
	let mockAppend: Mock<typeof fs.appendFile>;

	beforeEach(async () => {
		mockOutput = Bun.file("test.log");
		mockAppend = jest.fn();
		await mock.module("fs/promises", () => ({
			appendFile: mockAppend,
		}));
		logManager = new LogManager(mockOutput);
	});

	it("should initialize and write init log", () => {
		expect(mockAppend).toHaveBeenCalledWith(
			mockOutput.name,
			expect.stringContaining("--- INIT LogManager at")
		);
	});

	it("should log message with timestamp", async () => {
		await logManager.log(LogLevel.INFO, "TestEntity", "Test message");
		expect(mockAppend).toHaveBeenCalledWith(
			mockOutput.name,
			expect.stringContaining("[INFO] TestEntity: Test message")
		);
	});

	it("should log message without timestamp", async () => {
		await logManager.log(
			LogLevel.INFO,
			"TestEntity",
			"Test message",
			false
		);
		expect(mockAppend).toHaveBeenCalledWith(
			mockOutput.name,
			"[INFO] TestEntity: Test message\n"
		);
	});

	test.skip("should write to stdout", async () => {
		logManager = new LogManager(Bun.stdout);
		await logManager.log(LogLevel.INFO, "TestEntity", "Test message");

		const writeMock = jest.fn();

		await mock.module("Bun", () => ({
			stdout: Bun.stdout,
			write: writeMock,
		}));

		expect(writeMock).toHaveBeenCalledWith(
			Bun.stdout,
			expect.stringContaining("[INFO] TestEntity: Test message")
		);
	});

	it("should throw error if output file does not exist", () => {
		mockAppend.mockImplementationOnce(() => {
			return Promise.reject(
				new Error("Output file doesnt exist (and isnt stdout)")
			);
		});
		expect(
			logManager.log(LogLevel.INFO, "TestEntity", "Test message")
		).rejects.toThrow(Error);
	});

	it("should log error message", async () => {
		const error = new Error("Test error");
		await logManager.logError(LogLevel.ERROR, "TestEntity", error);
		expect(mockAppend).toHaveBeenCalledWith(
			mockOutput.name,
			expect.stringContaining("[ERROR] TestEntity: Test error")
		);
	});

	it("should log basic request details", async () => {
		const req = new Request("http://localhost/test", { method: "GET" });
		await logManager.logRequest(req, "127.0.0.1");

		expect(mockAppend).toHaveBeenCalledWith(
			mockOutput.name,
			expect.stringContaining("127.0.0.1: GET http://localhost/test")
		);
	});

	describe("Request logger", () => {
		it("should log all request details for JSON content type", async () => {
			const req = new Request("http://localhost/test", {
				method: "POST",
				headers: { "Content-Type": "application/json" },
				body: JSON.stringify({ test: "value" }),
			});
			await logManager.logRequest(req, "127.0.0.1", true);

			const expectedLog = `127.0.0.1: POST http://localhost/test
  [Headers]
    content-type: application/json
  [Body]
    {
        "test": "value"
    }
`;

			expect(mockAppend).toHaveBeenCalledWith(
				mockOutput.name,
				expect.stringContaining(expectedLog)
			);
		});

		it("should log all request details for text content type", async () => {
			const req = new Request("http://localhost/test", {
				method: "POST",
				headers: { "Content-Type": "text/plain" },
				body: "Test body",
			});
			await logManager.logRequest(req, "127.0.0.1", true);

			const expectedLog = `127.0.0.1: POST http://localhost/test
  [Headers]
    content-type: text/plain
  [Body]
    Test body
`;
			expect(mockAppend).toHaveBeenCalledWith(
				mockOutput.name,
				expect.stringContaining(expectedLog)
			);
		});

		it("should log all request details for FormData content-type", async () => {
			const formData = new FormData();
			formData.append("test", "value");
			const req = new Request("http://localhost/test", {
				method: "POST",
				body: formData,
			});
			await logManager.logRequest(req, "127.0.0.1", true);

			const expectedLog = `127.0.0.1: POST http://localhost/test
  [Headers]
    content-type: multipart/form-data; boundary=${
		req.headers.get("Content-Type")?.split("boundary=")[1] ?? ""
	}
  [Body]
    test: value
`;

			expect(mockAppend).toHaveBeenCalledWith(
				mockOutput.name,
				expect.stringContaining(
					expectedLog.replace("----", expect.any(String))
				)
			);
		});
	});
});

describe("MultiLogManager", () => {
	let multiLogManager: MultiLogManager;
	let mockLogManagers: LogManager[];
	let mockLog: jest.Mock;
	let mockLogError: jest.Mock;
	let mockLogRequest: jest.Mock;

	beforeEach(() => {
		mockLog = jest.fn();
		mockLogError = jest.fn();
		mockLogRequest = jest.fn();
		mockLogManagers = [
			{
				log: mockLog,
				logError: mockLogError,
				logRequest: mockLogRequest,
			},
			{
				log: mockLog,
				logError: mockLogError,
				logRequest: mockLogRequest,
			},
		] as unknown as LogManager[];
		multiLogManager = MultiLogManager.fromLogManagers(...mockLogManagers);
	});

	it("should log message to all logManagers", async () => {
		await multiLogManager.log(LogLevel.INFO, "TestEntity", "Test message");
		expect(mockLog).toHaveBeenCalledTimes(2);
		expect(mockLog).toHaveBeenCalledWith(
			LogLevel.INFO,
			"TestEntity",
			"Test message",
			true
		);
	});

	it("should log error to all logManagers", async () => {
		const error = new Error("Test error");
		await multiLogManager.logError(LogLevel.ERROR, "TestEntity", error);
		expect(mockLogError).toHaveBeenCalledTimes(2);
		expect(mockLogError).toHaveBeenCalledWith(
			LogLevel.ERROR,
			"TestEntity",
			error
		);
	});

	it("should log request to all logManagers", async () => {
		const req = new Request("http://localhost/test", { method: "GET" });
		await multiLogManager.logRequest(req, "127.0.0.1", true);
		expect(mockLogRequest).toHaveBeenCalledTimes(2);
		expect(mockLogRequest).toHaveBeenCalledWith(req, "127.0.0.1", true);
	});
});