feat(stats): 添加 Provider 性能统计分析

frontend/src/views/admin/__tests__/performanceAnalysisHelpers.spec.ts

@@ -0,0 +1,53 @@
+import { describe, expect, it } from 'vitest'
+import {
+  buildProviderPerformanceChartData,
+  formatProviderPerformanceMetric,
+} from '../performanceAnalysisHelpers'
+import type { ProviderPerformanceItem, ProviderPerformanceTimelineItem } from '@/api/admin'
+
+describe('performanceAnalysisHelpers', () => {
+  it('formats null provider metrics as placeholders', () => {
+    expect(formatProviderPerformanceMetric(null, 'ms')).toBe('-')
+    expect(formatProviderPerformanceMetric(undefined, '/s')).toBe('-')
+    expect(formatProviderPerformanceMetric(Number.NaN)).toBe('-')
+    expect(formatProviderPerformanceMetric(18.456, '/s')).toBe('18.46/s')
+  })
+
+  it('builds stable provider trend datasets with null gaps', () => {
+    const providers: Pick<ProviderPerformanceItem, 'provider_id' | 'provider'>[] = [
+      { provider_id: 'provider-a', provider: 'OpenAI' },
+      { provider_id: 'provider-b', provider: 'Anthropic' },
+    ]
+    const timeline: ProviderPerformanceTimelineItem[] = [
+      {
+        date: '2024-03-21',
+        provider_id: 'provider-a',
+        provider: 'OpenAI',
+        request_count: 2,
+        output_tokens: 100,
+        avg_output_tps: 25,
+        avg_first_byte_time_ms: 120,
+        avg_response_time_ms: 1000,
+        success_rate: 100,
+      },
+      {
+        date: '2024-03-22',
+        provider_id: 'provider-b',
+        provider: 'Anthropic',
+        request_count: 1,
+        output_tokens: 40,
+        avg_output_tps: null,
+        avg_first_byte_time_ms: 220,
+        avg_response_time_ms: 1500,
+        success_rate: 100,
+      },
+    ]
+
+    const chart = buildProviderPerformanceChartData(timeline, 'avg_output_tps', providers)
+
+    expect(chart.labels).toEqual(['2024-03-21', '2024-03-22'])
+    expect(chart.datasets.map(dataset => dataset.label)).toEqual(['OpenAI', 'Anthropic'])
+    expect(chart.datasets[0].data).toEqual([25, null])
+    expect(chart.datasets[1].data).toEqual([null, null])
+  })
+})