[codex] Fix formatBytes edge cases

frontend/src/lib/utils.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from 'vitest'
+
+import { formatBytes } from './utils'
+
+describe('formatBytes', () => {
+  it('formats byte values across supported units', () => {
+    expect(formatBytes(0)).toBe('0 B')
+    expect(formatBytes(512)).toBe('512.0 B')
+    expect(formatBytes(1024)).toBe('1.0 KB')
+    expect(formatBytes(1024 ** 2)).toBe('1.0 MB')
+    expect(formatBytes(1024 ** 5)).toBe('1.0 PB')
+    expect(formatBytes(1024 ** 6)).toBe('1.0 EB')
+  })
+
+  it('handles invalid or out-of-range values without undefined units', () => {
+    expect(formatBytes(-1)).toBe('–')
+    expect(formatBytes(Number.NaN)).toBe('–')
+    expect(formatBytes(Number.POSITIVE_INFINITY)).toBe('–')
+    expect(formatBytes(0.5)).toBe('0.5 B')
+    expect(formatBytes(1024 ** 7)).toBe('1024.0 EB')
+  })
+})

frontend/src/lib/utils.ts

@@ -20,10 +20,11 @@ export function formatDuration(seconds: number): string {
 }
 
 export function formatBytes(bytes: number): string {
+  if (!Number.isFinite(bytes) || bytes < 0) return '–'
   if (bytes === 0) return '0 B'
   const k = 1024
-  const sizes = ['B', 'KB', 'MB', 'GB', 'TB']
-  const i = Math.floor(Math.log(bytes) / Math.log(k))
+  const sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB']
+  const i = Math.max(0, Math.min(Math.floor(Math.log(bytes) / Math.log(k)), sizes.length - 1))
   return `${(bytes / Math.pow(k, i)).toFixed(1)} ${sizes[i]}`
 }
 

frontend/src/test/setup.ts

@@ -0,0 +1 @@
+import '@testing-library/jest-dom/vitest'