feat(util): support for util.TextDecoder (#990)

* build:(landing) automated website build

* Revert "build:(landing) automated website build"

This reverts commit ddee8485fd8b76160962c410b885e17aaff95b4e.

* feat(util): support for util.TextDecoder

* tests(util): add TextDecoder

* tests: seperate text-decoder

Co-authored-by: xHyroM <xHyroM@users.noreply.github.com>

3 files changed, 77 insertions, 55 deletions

diff --git a/test/bun.js/text-decoder.test.js b/test/bun.js/text-decoder.test.js
new file mode 100644
index 000000000..f132fa7da
--- /dev/null
+++ b/test/bun.js/text-decoder.test.js
@@ -0,0 +1,69 @@
+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);
+  });
+});
diff --git a/test/bun.js/text-encoder.test.js b/test/bun.js/text-encoder.test.js
index 5f8778bde..2c8f9acf4 100644
--- a/test/bun.js/text-encoder.test.js
+++ b/test/bun.js/text-encoder.test.js
@@ -13,61 +13,6 @@ const getByteLength = (str) => {
   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 with non-ascii latin1 characters", () => {
     var text = "H©ell©o Wor©ld!";
diff --git a/test/bun.js/util.test.js b/test/bun.js/util.test.js
index 481eea2ed..15d3cd221 100644
--- a/test/bun.js/util.test.js
+++ b/test/bun.js/util.test.js
@@ -263,4 +263,12 @@ describe("util", () => {
       expect(util.TextEncoder === globalThis.TextEncoder).toBe(true);
     });
   });
+  
+  describe("TextDecoder", () => {
+    // test/bun.js/text-decoder.test.js covers test cases for TextDecoder
+    // here we test only if we use the same via util.TextDecoder
+    it("is same as global TextDecoder", () => {
+      expect(util.TextDecoder === globalThis.TextDecoder).toBe(true);
+    });
+  });
 });