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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.import { equal } from "./equal.ts";import { format } from "./_format.ts";import { AssertionError } from "./assertion_error.ts";import { red } from "../fmt/colors.ts";import { buildMessage, diff, diffstr } from "./_diff.ts";import { CAN_NOT_DISPLAY } from "./_constants.ts";
/** * Make an assertion that `actual` and `expected` are equal, deeply. If not * deeply equal, then throw. * * Type parameter can be specified to ensure values under comparison have the * same type. * * @example * ```ts * import { assertEquals } from "https://deno.land/std@$STD_VERSION/assert/assert_equals.ts"; * * assertEquals("world", "world"); // Doesn't throw * assertEquals("hello", "world"); // Throws * ``` * * Note: formatter option is experimental and may be removed in the future. */export function assertEquals<T>(  actual: T,  expected: T,  msg?: string,  options: { formatter?: (value: unknown) => string } = {},) {  if (equal(actual, expected)) {    return;  }  const { formatter = format } = options;  const msgSuffix = msg ? `: ${msg}` : ".";  let message = `Values are not equal${msgSuffix}`;
  const actualString = formatter(actual);  const expectedString = formatter(expected);  try {    const stringDiff = (typeof actual === "string") &&      (typeof expected === "string");    const diffResult = stringDiff      ? diffstr(actual as string, expected as string)      : diff(actualString.split("\n"), expectedString.split("\n"));    const diffMsg = buildMessage(diffResult, { stringDiff }).join("\n");    message = `${message}\n${diffMsg}`;  } catch {    message = `${message}\n${red(CAN_NOT_DISPLAY)} + \n\n`;  }  throw new AssertionError(message);}