1 files changed, 212 insertions, 0 deletions
diff --git a/test/bun.js/text-encoder.test.js b/test/bun.js/text-encoder.test.js
new file mode 100644
index 000000000..5687e0222
--- /dev/null
+++ b/test/bun.js/text-encoder.test.js
@@ -0,0 +1,212 @@
+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);
+  });
+});