react-native-logs/test/index.test.js

Performance-aware simple logger for React-Native with namespaces, custom levels and custom transports (colored console, file writing, etc.)

"use strict";
var rnlogs = require("../dist/index.js");

test("Module should be defined", () => {
  expect(rnlogs).toBeDefined();
  expect(rnlogs.logger).toBeDefined();
});

test("Logger should be created by createLogger", () => {
  var log = rnlogs.logger.createLogger();
  expect(log).toBeDefined();
});

test("The default log functions should be defined in all transports", () => {
  var log = rnlogs.logger.createLogger();
  expect(log.debug).toBeDefined();
  expect(log.info).toBeDefined();
  expect(log.warn).toBeDefined();
  expect(log.error).toBeDefined();
});

test("When setSeverity, the getSeverity should be the same", () => {
  var log = rnlogs.logger.createLogger();
  log.setSeverity("info");
  expect(log.getSeverity()).toBe("info");
  log.setSeverity("debug");
  expect(log.getSeverity()).toBe("debug");
});

test("When set higher severity level then the current level, log function shoud return false", () => {
  var log = rnlogs.logger.createLogger();
  log.setSeverity("info");
  expect(log.debug("message")).toBe(false);
});

test("Custom levels should be defined, even with wrong level config", () => {
  var customConfig = {
    severity: "wrongLevel",
    levels: { custom: 0 },
  };
  var log = rnlogs.logger.createLogger(customConfig);
  log.setSeverity("custom");
  expect(log.getSeverity()).toBe("custom");
  expect(log.custom).toBeDefined();
});

test("Set wrong level config should throw error", () => {
  expect.assertions(1);
  var customConfig = {
    severity: "wrongLevel",
    levels: { wrongLevel: "thisMustBeANumber" },
  };
  try {
    var log = rnlogs.logger.createLogger(customConfig);
  } catch (e) {
    expect(e.message).toMatch(
      "[react-native-logs] ERROR: [wrongLevel] wrong level config"
    );
  }
});

test("Set undefined level should throw error", () => {
  expect.assertions(1);
  var log = rnlogs.logger.createLogger();
  try {
    log.setSeverity("wrongLevel");
  } catch (e) {
    expect(e.message).toMatch(
      "[react-native-logs:setSeverity] ERROR: Level [wrongLevel] not exist"
    );
  }
});

test("Initialize with reserved key should throw error", () => {
  expect.assertions(1);
  var customConfig = {
    severity: "custom",
    levels: { custom: 0, setSeverity: 1 },
  };
  try {
    var log = rnlogs.logger.createLogger(customConfig);
  } catch (e) {
    expect(e.message).toMatch(
      "[react-native-logs] ERROR: [setSeverity] is a reserved key, you cannot set it as custom level"
    );
  }
});