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

1 files changed, 28 insertions, 0 deletions

diff --git a/vanilla/node_modules/@exodus/bytes/hex.node.js b/vanilla/node_modules/@exodus/bytes/hex.node.js
new file mode 100644
index 0000000..a4fc000
--- /dev/null
+++ b/vanilla/node_modules/@exodus/bytes/hex.node.js
@@ -0,0 +1,28 @@
+import { typedView } from './array.js'
+import { assertU8, E_STRING } from './fallback/_utils.js'
+import { E_HEX } from './fallback/hex.js'
+
+if (Buffer.TYPED_ARRAY_SUPPORT) throw new Error('Unexpected Buffer polyfill')
+
+const { toHex: webHex } = Uint8Array.prototype // Modern engines have this
+const denoBug = Buffer.from('ag', 'hex').length > 0
+
+export function toHex(arr) {
+  assertU8(arr)
+  if (arr.length === 0) return ''
+  if (webHex && arr.toHex === webHex) return arr.toHex()
+  if (arr.constructor === Buffer && Buffer.isBuffer(arr)) return arr.hexSlice(0, arr.byteLength)
+  return Buffer.from(arr.buffer, arr.byteOffset, arr.byteLength).hexSlice(0, arr.byteLength)
+}
+
+// Unlike Buffer.from(), throws on invalid input
+export const fromHex = Uint8Array.fromHex
+  ? (str, format = 'uint8') => typedView(Uint8Array.fromHex(str), format)
+  : (str, format = 'uint8') => {
+      if (typeof str !== 'string') throw new TypeError(E_STRING)
+      if (str.length % 2 !== 0) throw new SyntaxError(E_HEX)
+      if (denoBug && /[^\dA-Fa-f]/.test(str)) throw new SyntaxError(E_HEX)
+      const buf = Buffer.from(str, 'hex') // will stop on first non-hex character, so we can just validate length
+      if (buf.length * 2 !== str.length) throw new SyntaxError(E_HEX)
+      return typedView(buf, format)
+    }