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

1 files changed, 17 insertions, 0 deletions

diff --git a/vanilla/node_modules/@exodus/bytes/array.js b/vanilla/node_modules/@exodus/bytes/array.js
new file mode 100644
index 0000000..b97c06a
--- /dev/null
+++ b/vanilla/node_modules/@exodus/bytes/array.js
@@ -0,0 +1,17 @@
+import { assertTypedArray } from './assert.js'
+
+const Buffer = globalThis.Buffer // Buffer is optional
+
+export function typedView(arr, format) {
+  assertTypedArray(arr)
+  switch (format) {
+    case 'uint8':
+      if (arr.constructor === Uint8Array) return arr // fast path
+      return new Uint8Array(arr.buffer, arr.byteOffset, arr.byteLength)
+    case 'buffer':
+      if (arr.constructor === Buffer && Buffer.isBuffer(arr)) return arr
+      return Buffer.from(arr.buffer, arr.byteOffset, arr.byteLength)
+  }
+
+  throw new TypeError('Unexpected format')
+}