fix(TopicInfo): do not display /s when speed is undefined

Author: artemmufazalov

src/utils/index.js

@@ -20,7 +20,15 @@ export const formatBytes = (bytes) => {
     return numeral(bytes).format('0 b');
 };
 
-export const formatBps = (bytes) => formatBytes(bytes) + '/s';
+export const formatBps = (bytes) => {
+    const formattedBytes = formatBytes(bytes);
+
+    if (!formattedBytes) {
+        return '';
+    }
+
+    return formattedBytes + '/s';
+};
 
 export const formatBytesToGigabyte = (bytes) => {
     return `${Math.floor(bytes / GIGABYTE)} GB`;