show change of assert.throws since Node.js v13

assert.throws.v12.js

// v12
const assert = require('assert');
const SomeError = class extends Error{};

try {
  // 第一引数でthrowされたエラーがSomeErrorか判定
  assert.throws(() => {throw new TypeError({})}, SomeError)
} catch (e) {
  // eはTypeError
  assert.ok(e instanceof TypeError)
}

assert.throws.v13.js

// v13
const assert = require('assert');
const SomeError = class extends Error{};

try {
  // 第一引数でthrowされたエラーがSomeErrorか判定
  () => assert.throws(() => {throw new TypeError({})}, SomeError)
} catch (e) {
  // eはTypeErrorではなくAssertionErrorに内包されている
  assert.strictEqual(
    e,
    {
      generatedMessage: true,
      actual: new TypeError({}),
      expected: AssertionError,
      code: 'ERR_ASSERTION',
      name: 'AssertionError',
      operator: 'throws',
      message: 'The error is expected to be an instance of "AssertionError". ' +
              'Received "TypeError"\n\nError message:\n\n[object Object]'
    }
  )
}