Address pull request comments

examples/experimental/fs/fs.js

@@ -21,14 +21,16 @@ export default async function () {
 		throw new Error("Unexpected file name");
 	}
 
-	// Define a buffer of the same size as the file
-	// to read the file content into.
 	const buffer = new Uint8Array(4);
 
 	let totalBytesRead = 0;
-	while (totalBytesRead < fileinfo.size) {
+	while (true) {
 		// Read into the buffer
 		const bytesRead = await file.read(buffer);
+		if (bytesRead == null) {
+			// EOF
+			break;
+		}
 
 		// Do something useful with the content of the buffer
 

js/modules/k6/experimental/fs/module.go

@@ -264,7 +264,10 @@ func (f *File) Seek(offset goja.Value, whence goja.Value) *goja.Promise {
 	}
 
 	seekMode := SeekMode(whence.ToInteger())
-	if seekMode != SeekModeStart && seekMode != SeekModeCurrent && seekMode != SeekModeEnd {
+	switch seekMode {
+	case SeekModeStart, SeekModeCurrent, SeekModeEnd:
+		// Valid modes, do nothing.
+	default:
 		reject(newFsError(TypeError, "seek() failed; reason: whence must be a SeekMode"))
 		return promise
 	}