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import { StringView } from "../string-view.ts";import { assertEquals } from "./test_deps.ts";
const { test } = Deno;const Encoder = new TextEncoder();const randomString = "qwertyasфы←😀ячсм";
test("[StringView.decode] decodes encoded string", () => {  const view = new StringView(Encoder.encode(randomString).buffer);  assertEquals(StringView.decode(view), randomString);  assertEquals(StringView.decode(view, 1, 3), "wer");  assertEquals(StringView.decode(view, 2, 6), "ertyas");  assertEquals(StringView.decode(view, 6, 21), "asфы←😀ячсм");});
test("[StringView.decode] decodes long encoded strings with TextDecoder", () => {  const string = randomString.repeat(15);  const view = new StringView(Encoder.encode(string).buffer);  assertEquals(StringView.decode(view), string);  assertEquals(StringView.decode(view, 6, 399), string.slice(6));});
test("[StringView.encode] encodes a string", () => {  const view = new StringView(new ArrayBuffer(30));  const written = StringView.encode(randomString, view);  assertEquals(StringView.decode(view, 0, written), randomString);});
test("[StringView.encode] handles 3-byte strings", () => {  const view = new StringView(new ArrayBuffer(10));  const written = StringView.encode("—", view);  assertEquals(StringView.decode(view, 0, written), "—");});
test("[StringView.encode] handles bad strings", () => {  const view = new StringView(new ArrayBuffer(10));  const written = StringView.encode("—", view);  assertEquals(StringView.decode(view, 0, written), "—");});
test("[StringView#size] returns the amount UTF characters in the view", () => {  assertEquals(StringView.from("asdf").size, 4);  assertEquals(StringView.from("фыва").size, 4);  assertEquals(StringView.from("😀😀fooа😀←").size, 8);});
test("[StringView.from] creates a StringView from a string", () => {  const stringView = StringView.from("foo");  assertEquals(stringView instanceof StringView, true);  assertEquals(stringView.byteLength, 3);  assertEquals(stringView.toString(), "foo");});
test("[StringView.getLength] returns the size in bytes of a given string", () => {  assertEquals(StringView.getLength("asdf"), 4);  assertEquals(StringView.getLength("—"), 3);  assertEquals(StringView.getLength("фыва"), 8);  assertEquals(StringView.getLength("😀😀fooа😀←"), 20);});
test("[StringView.encode] encodes a string into a limited size buffer", () => {  const view = new StringView(new ArrayBuffer(30));  const written = StringView.encode(randomString, view, 0, 8);  assertEquals(StringView.decode(view, 0, written), "qwertyas");});
test("[StringView.encode] encodes long strings with TextEncoder", () => {  const string = randomString.repeat(15);  const view = new StringView(new ArrayBuffer(405));  const written = StringView.encode(string, view);  assertEquals(StringView.decode(view, 0, written), string);});
test("[StringView.encode] encodes a long string into smaller buffer using TextEncoder", () => {  const string = randomString.repeat(15);  const view = new StringView(new ArrayBuffer(216));  const written = StringView.encode(string, view, 0, 216);  assertEquals(StringView.decode(view, 0, written), randomString.repeat(8));});
test("[StringView#character] iterates over the characters in the StringView", () => {  const stringView = StringView.from("asфы←😀");  const chars = [];  for (const character of stringView.characters()) {    chars.push(character);  }  assertEquals(chars, ["a", "s", "ф", "ы", "←", "😀"]);});
test("[StringView#charAt] returns a new string consisting of the single UTF character", () => {  const stringView = StringView.from("asфы←😀");  const chars = [];  for (let i = 0; i < stringView.size; i++) {    chars[i] = stringView.charAt(i);  }  assertEquals(chars, ["a", "s", "ф", "ы", "←", "😀"]);});
test("[StringView#charAt] returns an empty string if the character is not found", () => {  const invalidString = StringView.from("");  assertEquals(invalidString.charAt(), "");  assertEquals(invalidString.charAt(1), "");  assertEquals(invalidString.charAt(10), "");});
test("[StringView#replace] replaces a pattern with a replacement", () => {  const stringView = StringView.from("Vimessaid");  stringView    .replace(Encoder.encode("s"), Encoder.encode("x"))    .replace(Encoder.encode("d"), Encoder.encode("y"));  assertEquals(stringView.toString(), "Vimexxaiy");});
test("[StringView#reverse] reverses the characters of the StringView in-place", () => {  const stringView = StringView.from("fooа😀←ц");  assertEquals(stringView.reverse().toString(), "ц←😀аoof");});
test("[StringView#includes] checks whether the provided encoded sequence is found inside the view", () => {  const stringView = StringView.from("Vimesi");  assertEquals(stringView.includes(Encoder.encode("im")), true);  assertEquals(stringView.includes(Encoder.encode("x")), false);});
test("[StringView#indexOf] returns the index of the first occurrence of the specified value", () => {  const stringView = StringView.from("Vimesi");  assertEquals(stringView.indexOf(Encoder.encode("im")), 1);  assertEquals(stringView.indexOf(Encoder.encode("Vi")), 0);  assertEquals(stringView.indexOf(Encoder.encode("Vimes")), 0);  assertEquals(stringView.indexOf(Encoder.encode("x")), -1);  assertEquals(stringView.indexOf(Encoder.encode("Vix")), -1);  assertEquals(stringView.indexOf(Encoder.encode("s")), 4);  assertEquals(stringView.indexOf(Encoder.encode("i")), 1);  assertEquals(stringView.indexOf(Encoder.encode("i"), 2), 5);
  const array = new Uint8Array(    new Array(300).fill(0).map(() => (Math.random() * 128) | 0),  );  const longString = new StringView(array.buffer);  longString.setUint8(0, 97);  assertEquals(longString.byteLength, 300);  assertEquals(longString.indexOf(Encoder.encode("ё")), -1);  assertEquals(longString.indexOf(Encoder.encode("a")), 0);});
test("[StringView#set] encodes a given string into the StringView", () => {  const stringView = new StringView(new ArrayBuffer(6));  stringView.set("qwerty");  assertEquals(stringView.toString(), "qwerty");  stringView.set("qwerty12");  assertEquals(stringView.toString(), "qwerty");  stringView.set("1234");  assertEquals(stringView.toString(), "1234");});
test("[StringView#substring] returns a new string containing the specified part of the given string", () => {  const stringView = StringView.from(randomString);  assertEquals(stringView.substring(0, 6), "qwerty");  assertEquals(stringView.substring(6, 11), "asфы←");  assertEquals(stringView.substring(6, 10), "asфы");  assertEquals(stringView.substring(6, 13), "asфы←😀я");  assertEquals(stringView.substring(10, 12), "←😀");});
test("[StringView#substring] returns an empty string if characters are not found", () => {  const invalidString = new StringView(    new Uint8Array([128, 155, 134]).buffer,  );  assertEquals(invalidString.substring(), "");});
test("[StringView#toString] returns a string representation of the StringView", () => {  const stringView = StringView.from("foo");  assertEquals(stringView.toString(), "foo");});
test("[StringView#toJSON] returns a string representation of the StringView", () => {  const stringView = StringView.from("foo");  assertEquals(JSON.stringify(stringView), '"foo"');});
test("[StringView#trim] returns a StringView without trailing zeros", () => {  const stringView = new StringView(new ArrayBuffer(10));  assertEquals(stringView.byteLength, 10);  stringView.set("foo");  assertEquals(stringView.trim().byteLength, 3);  assertEquals(StringView.from("bar").trim().byteLength, 3);});
test("[StringView.initialize] initializes a view class", () => {  assertEquals(StringView.initialize(), StringView);});