simple-leveled-log-methods/dist/generateLogMethod.test.js

a simple and opinionated logging library. plays well with aws lambda + cloudwatch.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const constants_1 = require("./constants");
const generateLogMethod_1 = require("./generateLogMethod");
describe('generateLogMethod', () => {
    beforeEach(() => jest.clearAllMocks());
    it('should generate a method that outputs to console.log if below warn level', () => {
        const spy = jest.spyOn(console, 'log');
        const logError = (0, generateLogMethod_1.generateLogMethod)({
            level: constants_1.LogLevel.INFO,
            minimalLogLevel: constants_1.LogLevel.DEBUG,
        });
        logError('testMessage');
        expect(spy).toHaveBeenCalledTimes(1);
    });
    it('should generate a method that outputs to console.warn if at or above warn level', () => {
        const spy = jest.spyOn(console, 'warn');
        const logError = (0, generateLogMethod_1.generateLogMethod)({
            level: constants_1.LogLevel.ERROR,
            minimalLogLevel: constants_1.LogLevel.DEBUG,
        });
        logError('testMessage');
        expect(spy).toHaveBeenCalledTimes(1);
    });
    it('should generate a method that outputs timestamp, level, message, and metadata', () => {
        const spy = jest.spyOn(console, 'warn');
        const logError = (0, generateLogMethod_1.generateLogMethod)({
            level: constants_1.LogLevel.ERROR,
            minimalLogLevel: constants_1.LogLevel.DEBUG,
        });
        logError('testMessage', { nested: { object: true } });
        expect(spy).toHaveBeenCalledTimes(1);
        expect(spy).toHaveBeenCalledWith(expect.objectContaining({
            level: constants_1.LogLevel.ERROR,
            message: 'testMessage',
            metadata: JSON.stringify({ nested: { object: true } }),
        }));
        expect(spy.mock.calls[0][0]).toHaveProperty('timestamp');
    });
    it('should not output anything if level is below minimum', () => {
        const spy = jest.spyOn(console, 'log');
        const logDebug = (0, generateLogMethod_1.generateLogMethod)({
            level: constants_1.LogLevel.DEBUG,
            minimalLogLevel: constants_1.LogLevel.WARN,
        });
        logDebug('testMessage');
        expect(spy).not.toHaveBeenCalled();
    });
});
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