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import { expect, it, describe } from "bun:test";
import { gc as gcTrace } from "./gc";
const getByteLength = (str) => {
// returns the byte length of an utf8 string
var s = str.length;
for (var i = str.length - 1; i >= 0; i--) {
var code = str.charCodeAt(i);
if (code > 0x7f && code <= 0x7ff) s++;
else if (code > 0x7ff && code <= 0xffff) s += 2;
if (code >= 0xdc00 && code <= 0xdfff) i--; //trail surrogate
}
return s;
};
describe("TextDecoder", () => {
it("should decode ascii text", () => {
const decoder = new TextDecoder("latin1");
gcTrace(true);
expect(decoder.encoding).toBe("windows-1252");
gcTrace(true);
expect(decoder.decode(new Uint8Array([0x41, 0x42, 0x43]))).toBe("ABC");
gcTrace(true);
const result = [72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33];
gcTrace(true);
expect(decoder.decode(Uint8Array.from(result))).toBe(
String.fromCharCode(...result)
);
gcTrace(true);
});
it("should decode unicode text", () => {
const decoder = new TextDecoder();
gcTrace(true);
var text = `❤️ Red Heart`;
const bytes = [
226, 157, 164, 239, 184, 143, 32, 82, 101, 100, 32, 72, 101, 97, 114, 116,
];
const decoded = decoder.decode(Uint8Array.from(bytes));
expect(decoder.encoding).toBe("utf-8");
gcTrace(true);
for (let i = 0; i < text.length; i++) {
expect(decoded.charCodeAt(i)).toBe(text.charCodeAt(i));
}
expect(decoded).toHaveLength(text.length);
gcTrace(true);
});
it("should decode unicode text with multiple consecutive emoji", () => {
const decoder = new TextDecoder();
const encoder = new TextEncoder();
gcTrace(true);
var text = `❤️❤️❤️❤️❤️❤️ Red Heart`;
text += ` ✨ Sparkles 🔥 Fire 😀 😃 😄 😁 😆 😅 😂 🤣 🥲 ☺️ 😊 😇 🙂 🙃 😉 😌 😍 🥰 😘 😗 😙 😚 😋 😛 😝 😜 🤪 🤨 🧐 🤓 😎 🥸 🤩 🥳 😏 😒 😞 😔 😟 😕 🙁 ☹️ 😣 😖 😫 😩 🥺 😢 😭 😤 😠 😡 🤬 🤯 😳 🥵 🥶 😱 😨 😰`;
gcTrace(true);
expect(decoder.decode(encoder.encode(text))).toBe(text);
gcTrace(true);
const bytes = new Uint8Array(getByteLength(text) * 8);
gcTrace(true);
const amount = encoder.encodeInto(text, bytes);
gcTrace(true);
expect(decoder.decode(bytes.subarray(0, amount.written))).toBe(text);
gcTrace(true);
});
});
describe("TextEncoder", () => {
it("should encode latin1 text", () => {
gcTrace(true);
const text = "Hello World!";
const encoder = new TextEncoder();
gcTrace(true);
const encoded = encoder.encode(text);
gcTrace(true);
expect(encoded instanceof Uint8Array).toBe(true);
expect(encoded.length).toBe(text.length);
gcTrace(true);
const result = [72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33];
for (let i = 0; i < result.length; i++) {
expect(encoded[i]).toBe(result[i]);
}
});
it("should encode long latin1 text", async () => {
const text = "Hello World!".repeat(1000);
const encoder = new TextEncoder();
gcTrace(true);
const encoded = encoder.encode(text);
gcTrace(true);
expect(encoded instanceof Uint8Array).toBe(true);
expect(encoded.length).toBe(text.length);
gcTrace(true);
const decoded = new TextDecoder().decode(encoded);
expect(decoded).toBe(text);
gcTrace();
await new Promise((resolve) => setTimeout(resolve, 1));
gcTrace();
expect(decoded).toBe(text);
});
it("should encode latin1 rope text", () => {
var text = "Hello";
text += " ";
text += "World!";
gcTrace(true);
const encoder = new TextEncoder();
const encoded = encoder.encode(text);
gcTrace(true);
const into = new Uint8Array(100);
const out = encoder.encodeInto(text, into);
gcTrace(true);
expect(out.read).toBe(text.length);
expect(out.written).toBe(encoded.length);
expect(encoded instanceof Uint8Array).toBe(true);
const result = [72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33];
for (let i = 0; i < result.length; i++) {
expect(encoded[i]).toBe(result[i]);
expect(encoded[i]).toBe(into[i]);
}
expect(encoded.length).toBe(getByteLength(text));
});
it("should encode utf-16 text", () => {
var text = `❤️ Red Heart
✨ Sparkles
🔥 Fire
`;
var encoder = new TextEncoder();
var decoder = new TextDecoder();
gcTrace(true);
expect(decoder.decode(encoder.encode(text))).toBe(text);
gcTrace(true);
});
// this test is from a web platform test in WebKit
describe("should use a unicode replacement character for invalid surrogate pairs", () => {
var bad = [
{
encoding: "utf-16le",
input: [0x00, 0xd8],
expected: "\uFFFD",
name: "lone surrogate lead",
},
{
encoding: "utf-16le",
input: [0x00, 0xdc],
expected: "\uFFFD",
name: "lone surrogate trail",
},
{
encoding: "utf-16le",
input: [0x00, 0xd8, 0x00, 0x00],
expected: "\uFFFD\u0000",
name: "unmatched surrogate lead",
},
{
encoding: "utf-16le",
input: [0x00, 0xdc, 0x00, 0x00],
expected: "\uFFFD\u0000",
name: "unmatched surrogate trail",
},
{
encoding: "utf-16le",
input: [0x00, 0xdc, 0x00, 0xd8],
expected: "\uFFFD\uFFFD",
name: "swapped surrogate pair",
},
];
bad.forEach(function (t) {
it(t.encoding + " - " + t.name, () => {
gcTrace(true);
expect(
new TextDecoder(t.encoding).decode(new Uint8Array(t.input))
).toBe(t.expected);
expect(
new TextDecoder(t.encoding).decode(
new Uint16Array(new Uint8Array(t.input).buffer)
)
).toBe(t.expected);
gcTrace(true);
});
// test(function () {
// assert_throws_js(TypeError, function () {
// new TextDecoder(t.encoding, { fatal: true }).decode(
// new Uint8Array(t.input)
// );
// });
// }, t.encoding + " - " + t.name + " (fatal flag set)");
});
});
it("should encode utf-16 rope text", () => {
gcTrace(true);
var textReal = `❤️ Red Heart ✨ Sparkles 🔥 Fire`;
var a = textReal.split("");
var text = "";
for (let j of a) {
text += j;
}
var encoder = new TextEncoder();
expect(new TextDecoder().decode(encoder.encode(text))).toBe(textReal);
});
});
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