deno-bootstrap/test/infrastructure/logger.test.ts

import { assertEquals } from 'test-deps';
import { getLogLevel, Logger } from 'infra/logger.ts';

const testLogger = Logger.getInstance('test');

Deno.test('log.debug', async () => {
  const debugLog = 'this is a debug message';
  testLogger.debug(debugLog);
  const lastLog = testLogger.getLastMessage();
  assertEquals(lastLog, `[DEBUG] ${debugLog}`, 'debug log message');
});

Deno.test('log.info', async () => {
  const infoLog = 'this is a info message';
  testLogger.info(infoLog);
  const lastLog = testLogger.getLastMessage();
  assertEquals(lastLog, `[INFO] ${infoLog}`, 'info log message');
});

Deno.test('log.warn', async () => {
  const warnLog = 'this is a warn message';
  testLogger.warn(warnLog);
  const lastLog = testLogger.getLastMessage();
  assertEquals(lastLog, `[WARNING] ${warnLog}`, 'warn log message');
});

Deno.test('log.error', async () => {
  const errorLog = 'this is a error message';
  testLogger.error(errorLog);
  const lastLog = testLogger.getLastMessage();
  assertEquals(lastLog, `[ERROR] ${errorLog}`, 'error log message');
});

Deno.test('getLogLevel with valid level', () => {
  const level = 'INFO';
  assertEquals(getLogLevel(level), level);
});

Deno.test('getLogLevel with invalid level', () => {
  const level = 'INVALID_LEVEL';
  assertEquals(getLogLevel(level), 'WARNING');
});

Deno.test('getLogLevel with undefined level', () => {
  assertEquals(getLogLevel(undefined), 'WARNING');
});

Deno.test('logLevel with DEBUG_LEVEL environment variable set', () => {
  const originalDebugLevel = Deno.env.get('DEBUG_LEVEL');
  Deno.env.set('DEBUG_LEVEL', 'INFO');
  assertEquals(getLogLevel(Deno.env.get('DEBUG_LEVEL')), 'INFO');
  if (originalDebugLevel) {
    Deno.env.set('DEBUG_LEVEL', originalDebugLevel);
  } else {
    Deno.env.delete('DEBUG_LEVEL');
  }
});

Deno.test('logLevel with DEBUG_LEVEL environment variable not set', () => {
  const originalDebugLevel = Deno.env.get('DEBUG_LEVEL');
  Deno.env.delete('DEBUG_LEVEL');
  assertEquals(getLogLevel(Deno.env.get('DEBUG_LEVEL')), 'WARNING');
  if (originalDebugLevel) {
    Deno.env.set('DEBUG_LEVEL', originalDebugLevel);
  }
});