d-logger/test/logger.simple-formatter.test.js

import { assert, assertEquals } from "@std/assert";
import Logger from "../lib/logger.ts";
import {
  clearCapturedLogs,
  getCapturedLogs,
  restoreTTY,
  setTTYMode,
  setupMocks,
} from "./helpers/logger-test-helpers.js";

// Setup and teardown for all tests
setupMocks();

Deno.test("Logger Simple Formatter - Basic Simple Format - should produce simple text format", () => {
  clearCapturedLogs();
  const logger = new Logger({ format: "simple" });
  logger.info("test message");

  assertEquals(getCapturedLogs().length, 1);
  const logOutput = getCapturedLogs()[0];

  // Should contain timestamp, level, caller, and message
  assert(logOutput.includes("[INFO ]"));
  assert(logOutput.includes("test message"));
  // Should contain short timestamp by default
  assert(logOutput.match(/\[\d{4}-\d{2}-\d{2} \d{2}:\d{2}\]/));
});

Deno.test("Logger Simple Formatter - Basic Simple Format - should pad log levels correctly", () => {
  clearCapturedLogs();
  const logger = new Logger({ format: "simple", level: "debug" });
  logger.error("error msg");
  logger.debug("debug msg");

  const logs = getCapturedLogs();
  assert(logs[0].includes("[ERROR]"));
  assert(logs[1].includes("[DEBUG]"));
});

Deno.test("Logger Simple Formatter - Basic Simple Format - should include caller information", () => {
  clearCapturedLogs();
  const logger = new Logger({ format: "simple", callerLevel: "info" });
  logger.info("test message");

  const logOutput = getCapturedLogs()[0];
  // Should contain filename and line number
  assert(logOutput.includes(".js:"));
});

Deno.test("Logger Simple Formatter - Basic Simple Format - should format with long timestamp when specified", () => {
  clearCapturedLogs();
  const logger = new Logger({ format: "simple", time: "long" });
  logger.info("test message");

  const logOutput = getCapturedLogs()[0];

  // Should contain long time format in brackets
  assert(
    logOutput.match(/\[\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z\]/),
  );
  assert(logOutput.includes("T"));
  assert(logOutput.includes("Z"));
});

Deno.test("Logger Simple Formatter - All Log Levels in Simple Format - should format error level correctly", () => {
  clearCapturedLogs();
  const logger = new Logger({ format: "simple" });
  logger.error("error message");

  const logOutput = getCapturedLogs()[0];
  assert(logOutput.includes("[ERROR]"));
  assert(logOutput.includes("error message"));
});

Deno.test("Logger Simple Formatter - All Log Levels in Simple Format - should format warn level correctly", () => {
  clearCapturedLogs();
  const logger = new Logger({ format: "simple" });
  logger.warn("warn message");

  const logOutput = getCapturedLogs()[0];
  assert(logOutput.includes("[WARN ]"));
  assert(logOutput.includes("warn message"));
});

Deno.test("Logger Simple Formatter - All Log Levels in Simple Format - should format info level correctly", () => {
  clearCapturedLogs();
  const logger = new Logger({ format: "simple" });
  logger.info("info message");

  const logOutput = getCapturedLogs()[0];
  assert(logOutput.includes("[INFO ]"));
  assert(logOutput.includes("info message"));
});

Deno.test("Logger Simple Formatter - All Log Levels in Simple Format - should format debug level correctly", () => {
  clearCapturedLogs();
  const logger = new Logger({ format: "simple", level: "debug" });
  logger.debug("debug message");

  const logOutput = getCapturedLogs()[0];
  assert(logOutput.includes("[DEBUG]"));
  assert(logOutput.includes("debug message"));
});

Deno.test("Logger Simple Formatter - Color Handling - should include color codes when output is TTY", () => {
  clearCapturedLogs();
  setTTYMode(true);
  const logger = new Logger({ format: "simple" });
  logger.error("error message");

  const logOutput = getCapturedLogs()[0];
  // Should contain ANSI color codes
  assert(logOutput.includes("\x1b[91m")); // red for error
  assert(logOutput.includes("\x1b[0m")); // reset
});

Deno.test("Logger Simple Formatter - Color Handling - should not include color codes when output is redirected", () => {
  clearCapturedLogs();
  setTTYMode(false);
  const logger = new Logger({ format: "simple" });
  logger.error("error message");

  const logOutput = getCapturedLogs()[0];
  // Should not contain ANSI color codes
  assert(!logOutput.includes("\x1b["));
});

Deno.test("Logger Simple Formatter - Color Handling - should use appropriate colors for different levels", () => {
  clearCapturedLogs();
  setTTYMode(true);
  const logger = new Logger({ format: "simple", level: "debug" });

  logger.error("error");
  logger.warn("warn");
  logger.info("info");
  logger.debug("debug");

  const logs = getCapturedLogs();

  // Error should be red
  assert(logs[0].includes("\x1b[91m"));
  // Warn should be yellow
  assert(logs[1].includes("\x1b[33m"));
  // Info and debug might have different or no colors, but should have reset codes
  assert(logs[2].includes("\x1b[0m"));
  assert(logs[3].includes("\x1b[0m"));
});

Deno.test("Logger Simple Formatter - Color Handling - should respect custom color configuration", () => {
  clearCapturedLogs();
  setTTYMode(true);
  const logger = new Logger({
    format: "simple",
    colours: {
      error: "\x1b[31m", // different red
      warn: "\x1b[35m", // magenta instead of yellow
    },
  });

  logger.error("error message");
  logger.warn("warn message");

  const logs = getCapturedLogs();
  assert(logs[0].includes("\x1b[31m"));
  assert(logs[1].includes("\x1b[35m"));
});

Deno.test("Logger Simple Formatter - Message Formatting in Simple Mode - should handle multiple arguments", () => {
  clearCapturedLogs();
  const logger = new Logger({ format: "simple" });
  logger.info("Hello %s, you are %d years old", "John", 25);

  const logOutput = getCapturedLogs()[0];
  assert(logOutput.includes("Hello John, you are 25 years old"));
});

Deno.test("Logger Simple Formatter - Message Formatting in Simple Mode - should handle special characters", () => {
  clearCapturedLogs();
  const logger = new Logger({ format: "simple" });
  logger.info('Special chars: "quotes", \\backslash, \nnewline');

  const logOutput = getCapturedLogs()[0];
  assert(logOutput.includes('Special chars: "quotes"'));
});

Deno.test("Logger Simple Formatter - Message Formatting in Simple Mode - should handle empty messages", () => {
  clearCapturedLogs();
  const logger = new Logger({ format: "simple" });
  logger.info("");

  const logOutput = getCapturedLogs()[0];
  // Should still have the level and timestamp parts
  assert(logOutput.includes("[INFO ]"));
});

Deno.test("Logger Simple Formatter - TTY Detection Integration - should detect TTY mode changes correctly", () => {
  clearCapturedLogs();

  // Test with TTY
  setTTYMode(true);
  const ttyLogger = new Logger({ format: "simple" });
  ttyLogger.error("tty error");

  // Test without TTY
  setTTYMode(false);
  const noTtyLogger = new Logger({ format: "simple" });
  noTtyLogger.error("no tty error");

  const logs = getCapturedLogs();

  // First should have colors, second should not
  assert(logs[0].includes("\x1b["));
  assert(!logs[1].includes("\x1b["));
});

// Cleanup
restoreTTY();