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import { ObjectView } from "../object-view.ts";import { ViewConstructor } from "../view-types.ts";import { ArrayView } from "../array-view.ts";import { Uint8View } from "../numeric-view.ts";import { StringView } from "../string-view.ts";import { assertEquals } from "./test_deps.ts";import { Constructor } from "../utility-types.ts";
const { test } = Deno;interface Person {  name: string;  age: number;  scores: Array<number>;}
interface Family {  name: string;  members: Array<Person>;}
const Scores: ViewConstructor<Array<number>> = class extends ArrayView<number> {  static View = Uint8View;  static itemLength = 1;};
const PersonView: ViewConstructor<Person> = class extends ObjectView<Person> {  static viewLength = 14;  static layout = {    name: { View: StringView, start: 0, length: 10 },    age: { View: Uint8View, start: 10, length: 1, default: 100 },    scores: { View: Scores, start: 11, length: 3 },  };  static fields = ["name", "age", "scores"];  static defaultData = new Uint8Array(new ArrayBuffer(14));  static ObjectConstructor = (function () {    return { name: "", age: 0, scores: null };  }) as unknown as Constructor<    Person  >;};
PersonView.defaultData![10] = 100;
const Members: ViewConstructor<  Array<Person>> = class extends ArrayView<Person> {  static View = PersonView;  static itemLength = 14;};
const FamilyView: ViewConstructor<Family> = class extends ObjectView<Family> {  static viewLength = 52;  static layout = {    name: { View: StringView, start: 0, length: 10 },    members: { View: Members, start: 10, length: 42 },  };  static fields = ["name", "members"];  static defaultData = new Uint8Array(new ArrayBuffer(52));  static ObjectConstructor = (function () {    return { name: "", members: null };  }) as unknown as Constructor<Family>;};
test("[ObjectView.encode] encodes a JavaScript value into a given view", () => {  const expected = {    name: "Zaphod",    age: 30,    scores: [10, 20, 30],  };  const person = new PersonView(new ArrayBuffer(PersonView.viewLength));  PersonView.encode(expected, person);  assertEquals(person.toJSON(), expected);});
test("[ObjectView.from] creates a new object view with the given data", () => {  const expected = {    name: "Zaphod",    age: 30,    scores: [10, 20, 30],  };  const person = PersonView.from(expected);  assertEquals(person.toJSON(), expected);});
test("[ObjectView.from] supports default field values", () => {  const expected = {    name: "Zaphod",    scores: [10, 20, 30],  };  const person = PersonView.from(expected as Person);  assertEquals(person.toJSON(), {    name: "Zaphod",    age: 100,    scores: [10, 20, 30],  });});
test("[ObjectView.getLength] returns the byte length of an object view", () => {  assertEquals(PersonView.getLength(), 14);  assertEquals(FamilyView.getLength(), 52);});
test("[ObjectView#get] returns the JavaScript value of a given field", () => {  const person = PersonView.from({    name: "Zaphod",    age: 30,    scores: [10],  });  assertEquals(person.get("age"), 30);  assertEquals(person.get("name"), "Zaphod");  assertEquals(person.get("scores"), [10, 0, 0]);});
test("[ObjectView#getView] returns a view of a given field", () => {  const person = PersonView.from({    name: "Zaphod",    age: 30,    scores: [10],  });  assertEquals(person.getView("age") instanceof Uint8View, true);  assertEquals(person.getView("age")!.get(), 30);  assertEquals(person.getView("name") instanceof StringView, true);  assertEquals(person.getView("scores") instanceof Scores, true);});
test("[ObjectView#set] sets a given JavaScript value to a given field", () => {  const person = PersonView.from({    name: "Zaphod",    age: 30,    scores: [10],  });  person.set("name", "Arthur");  person.set("age", 42);  person.set("scores", [1, 2, 3]);  assertEquals(person.get("name"), "Arthur");  assertEquals(person.get("age"), 42);  assertEquals(person.get("scores"), [1, 2, 3]);});
test("[ObjectView#set] zeros out non-existing elements", () => {  const person = PersonView.from({    name: "Zaphod",    age: 30,    scores: [10, 20, 30],  });  person.set("scores", [3]);  assertEquals(person.get("scores"), [3, 0, 0]);});
test("[ObjectView#setView] copies a given view into a field", () => {  const person = PersonView.from({    name: "Zaphod",    age: 30,    scores: [10, 20, 30],  });  const value = new StringView(new ArrayBuffer(10));  value.setUint8(0, 35);  value.setUint8(9, 39);  person.setView("name", value);  const actual = person.getView("name")!;  assertEquals(actual, value);  assertEquals(actual.buffer !== value.buffer, true);});
test("[ObjectView#getLength] returns the byte length of a field", () => {  const person = PersonView.from({ name: "a", age: 10, scores: [] });  assertEquals(person.getLength("name"), 10);});