feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

1 files changed, 33 insertions, 0 deletions

diff --git a/vanilla/node_modules/undici/lib/encoding/index.js b/vanilla/node_modules/undici/lib/encoding/index.js
new file mode 100644
index 0000000..41f7794
--- /dev/null
+++ b/vanilla/node_modules/undici/lib/encoding/index.js
@@ -0,0 +1,33 @@
+'use strict'
+
+const textDecoder = new TextDecoder()
+
+/**
+ * @see https://encoding.spec.whatwg.org/#utf-8-decode
+ * @param {Uint8Array} buffer
+ */
+function utf8DecodeBytes (buffer) {
+  if (buffer.length === 0) {
+    return ''
+  }
+
+  // 1. Let buffer be the result of peeking three bytes from
+  //    ioQueue, converted to a byte sequence.
+
+  // 2. If buffer is 0xEF 0xBB 0xBF, then read three
+  //    bytes from ioQueue. (Do nothing with those bytes.)
+  if (buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
+    buffer = buffer.subarray(3)
+  }
+
+  // 3. Process a queue with an instance of UTF-8’s
+  //    decoder, ioQueue, output, and "replacement".
+  const output = textDecoder.decode(buffer)
+
+  // 4. Return output.
+  return output
+}
+
+module.exports = {
+  utf8DecodeBytes
+}