Codec.parse

Parses an unknown value using a funtypes Codec.

For example:

import * as ft from "funtypes";
import * as s from "funtypes-schemas";

export const UserCodec = ft.Object({
  id: ft.Number,
  name: ft.String,
  dateOfBirth: s.ParsedDateTimeString(),
});
// => ft.Codec<{ id: number; name: string; dateOfBirth: Date }>

// ✅ Validates and parses the Date
assert.deepEqual(
  UserCodec.parse({
    id: 1,
    name: "Forbes Lindesay",
    dateOfBirth: "1970-01-01T00:00:00.000Z",
  }),
  {
    id: 1,
    name: "Forbes Lindesay",
    dateOfBirth: new Date(
      "1970-01-01T00:00:00.000Z",
    ),
  },
);

// 🚨 Invalid: id should be a number, but here
//    we've passed a string instead.
assert.throws(() => {
  UserCodec.parse({
    id: "42",
    name: "Forbes Lindesay",
    dateOfBirth: "1970-01-01T00:00:00.000Z",
  });
});

// 🚨 Invalid: dateOfBirth is already a Date, but
//    the serialized value should have been as
//    string.
assert.throws(() => {
  UserCodec.parse({
    id: 1,
    name: "Forbes Lindesay",
    dateOfBirth: new Date(
      "1970-01-01T00:00:00.000Z",
    ),
  });
});