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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.import { AssertionError } from "./assertion_error.ts";
// deno-lint-ignore no-explicit-anytype AnyConstructor = new (...args: any[]) => any;type GetConstructorType<T extends AnyConstructor> = T extends // deno-lint-ignore no-explicit-anynew (...args: any) => infer C ? C  : never;
/** * Make an assertion that `obj` is an instance of `type`. * If not then throw. */export function assertInstanceOf<T extends AnyConstructor>(  actual: unknown,  expectedType: T,  msg = "",): asserts actual is GetConstructorType<T> {  if (actual instanceof expectedType) return;
  const msgSuffix = msg ? `: ${msg}` : ".";  const expectedTypeStr = expectedType.name;
  let actualTypeStr = "";  if (actual === null) {    actualTypeStr = "null";  } else if (actual === undefined) {    actualTypeStr = "undefined";  } else if (typeof actual === "object") {    actualTypeStr = actual.constructor?.name ?? "Object";  } else {    actualTypeStr = typeof actual;  }
  if (expectedTypeStr === actualTypeStr) {    msg =      `Expected object to be an instance of "${expectedTypeStr}"${msgSuffix}`;  } else if (actualTypeStr === "function") {    msg =      `Expected object to be an instance of "${expectedTypeStr}" but was not an instanced object${msgSuffix}`;  } else {    msg =      `Expected object to be an instance of "${expectedTypeStr}" but was "${actualTypeStr}"${msgSuffix}`;  }
  throw new AssertionError(msg);}