strukt.test.ts

import { Strukt, getFieldTypeSize, RecordOf, SchemaOf, Schema, } from "./strukt"; // deno need .ts ending

console.debug(
  getFieldTypeSize('u8'),
  getFieldTypeSize('i8'),
  getFieldTypeSize('ptr'),
  getFieldTypeSize('str'),
  getFieldTypeSize('i32'),
  getFieldTypeSize(['u8', 10]),
);

const Student1 = new Strukt('Student1', {
  name: 'u8',
  age: 'u16',
  isAlive: 'bool',
  isMale: 'bool',
});

type std = typeof Student1;           // can generate currect type from Strukt
type sch = SchemaOf<typeof Student1>; // can get schema type from Strukt
type rec = RecordOf<typeof Student1>; // can get record type from Strukt

console.log(
  Student1,
  Student1.size,
  Student1.sizeOf('age'),
  Student1.sizeOf("isAlive"),
);

const Student2 = new Strukt('Student2', {test:'bool', ...Student1.schema, 'end':'ptr'});
// notice that we can edit schema of existing strukt for another strukt
console.log(
  Student2,
  Student2.size,
  Student2.sizeOf('age'),
  Student2.sizeOf("isAlive"),
);

const Teacher = new Strukt('Teacher', {
  'id': 'u8',
  'align_id': ['u8', 5],
  'index': 'u32',
  'age': 'u8',
});
console.log(
  Teacher,
  Teacher.size,
  Teacher.sizeOf('age'),
  Teacher.sizeOf('id'),
);

const buf = new ArrayBuffer(Teacher.size);
const u8buf = new Uint8Array(buf);
u8buf.fill(-1); // 0xFF
console.log(u8buf);

for(let i=0; i<buf.byteLength; ++i) {
  u8buf[i] = i+74;
}
const teacher = Teacher.readFrom(buf) as RecordOf<typeof Teacher>;
console.log('random write', u8buf);
console.log('random read', teacher);

teacher.age = 26;
teacher.index = 5;
teacher.id = 2;
console.log('edit', teacher);
Teacher.writeTo(buf, teacher);
console.log(u8buf);

console.log('read again', Teacher.readFrom(buf));