chore: import upstream snapshot with attribution

apps/sim/lib/tools/falai-pricing.test.ts

@@ -0,0 +1,58 @@
+/**
+ * @vitest-environment node
+ */
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import {
+  FALAI_AUDIO_FALLBACK_PROVIDER_COST_DOLLARS,
+  FALAI_IMAGE_FALLBACK_PROVIDER_COST_DOLLARS,
+  FALAI_VIDEO_FALLBACK_PROVIDER_COST_DOLLARS,
+  getFalAICostMetadata,
+} from './falai-pricing'
+
+// Avoid the real inter-attempt backoff so the fallback path resolves instantly.
+vi.mock('@sim/utils/helpers', () => ({ sleep: vi.fn().mockResolvedValue(undefined) }))
+
+describe('getFalAICostMetadata fallback floor', () => {
+  const originalFetch = global.fetch
+
+  beforeEach(() => {
+    // Both fal cost endpoints (billing-events + pricing estimate) fail, forcing
+    // the provider-cost floor selection by endpoint category.
+    global.fetch = vi.fn().mockResolvedValue({
+      ok: false,
+      status: 500,
+      json: async () => ({}),
+      text: async () => 'error',
+    }) as unknown as typeof fetch
+  })
+
+  afterEach(() => {
+    global.fetch = originalFetch
+    vi.restoreAllMocks()
+  })
+
+  it.each([
+    ['fal-ai/f5-tts', FALAI_AUDIO_FALLBACK_PROVIDER_COST_DOLLARS],
+    ['fal-ai/gemini-3.1-flash-tts', FALAI_AUDIO_FALLBACK_PROVIDER_COST_DOLLARS],
+    ['fal-ai/minimax-music/v2.6', FALAI_AUDIO_FALLBACK_PROVIDER_COST_DOLLARS],
+    ['fal-ai/elevenlabs/sound-effects/v2', FALAI_AUDIO_FALLBACK_PROVIDER_COST_DOLLARS],
+    ['fal-ai/nano-banana', FALAI_IMAGE_FALLBACK_PROVIDER_COST_DOLLARS],
+    ['fal-ai/veo-3.1', FALAI_VIDEO_FALLBACK_PROVIDER_COST_DOLLARS],
+    ['fal-ai/seedance-2.0', FALAI_VIDEO_FALLBACK_PROVIDER_COST_DOLLARS],
+  ])('uses the correct provider-cost floor for %s', async (endpointId, expected) => {
+    const result = await getFalAICostMetadata({
+      apiKey: 'test-key',
+      endpointId,
+      requestId: 'req_123',
+    })
+
+    expect(result.source).toBe('fallback_floor')
+    expect(result.costDollars).toBe(expected)
+  })
+
+  it('never bills an audio clip at the video floor', () => {
+    expect(FALAI_AUDIO_FALLBACK_PROVIDER_COST_DOLLARS).toBeLessThan(
+      FALAI_VIDEO_FALLBACK_PROVIDER_COST_DOLLARS
+    )
+  })
+})