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

1 files changed, 22 insertions, 0 deletions

diff --git a/vanilla/node_modules/@exodus/bytes/utf16.native.js b/vanilla/node_modules/@exodus/bytes/utf16.native.js
new file mode 100644
index 0000000..2d94357
--- /dev/null
+++ b/vanilla/node_modules/@exodus/bytes/utf16.native.js
@@ -0,0 +1,22 @@
+import { encodeApi, decodeApiDecoders, decodeApiJS } from './fallback/utf16.js'
+import { nativeDecoder } from './fallback/platform.native.js'
+
+function checkDecoders() {
+  // Not all barebone engines with TextDecoder support something except utf-8
+  // Also workerd specifically has a broken utf-16le implementation
+  if (!nativeDecoder) return false
+  try {
+    const a = new TextDecoder('utf-16le').decode(Uint8Array.of(1, 2, 3, 0xd8))
+    const b = new TextDecoder('utf-16be').decode(Uint8Array.of(2, 1, 0xd8, 3))
+    return a === b && a === '\u0201\uFFFD'
+  } catch {}
+
+  return false
+}
+
+const decode = checkDecoders() ? decodeApiDecoders : decodeApiJS
+
+export const utf16fromString = (str, format = 'uint16') => encodeApi(str, false, format)
+export const utf16fromStringLoose = (str, format = 'uint16') => encodeApi(str, true, format)
+export const utf16toString = (arr, format = 'uint16') => decode(arr, false, format)
+export const utf16toStringLoose = (arr, format = 'uint16') => decode(arr, true, format)