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

1 files changed, 26 insertions, 0 deletions

diff --git a/vanilla/node_modules/@exodus/bytes/assert.js b/vanilla/node_modules/@exodus/bytes/assert.js
new file mode 100644
index 0000000..fee83fc
--- /dev/null
+++ b/vanilla/node_modules/@exodus/bytes/assert.js
@@ -0,0 +1,26 @@
+export function assertEmptyRest(rest) {
+  if (Object.keys(rest).length > 0) throw new TypeError('Unexpected extra options')
+}
+
+// eslint-disable-next-line sonarjs/no-nested-template-literals
+const makeMessage = (name, extra) => `Expected${name ? ` ${name} to be` : ''} an Uint8Array${extra}`
+
+const TypedArray = Object.getPrototypeOf(Uint8Array)
+
+export function assertTypedArray(arr) {
+  if (arr instanceof TypedArray) return
+  throw new TypeError('Expected a TypedArray instance')
+}
+
+export function assertUint8(arr, options) {
+  if (!options) {
+    // fast path
+    if (arr instanceof Uint8Array) return
+    throw new TypeError('Expected an Uint8Array')
+  }
+
+  const { name, length, ...rest } = options
+  assertEmptyRest(rest)
+  if (arr instanceof Uint8Array && (length === undefined || arr.length === length)) return
+  throw new TypeError(makeMessage(name, length === undefined ? '' : ` of size ${Number(length)}`))
+}