sub2api/backend/internal/service/pricing_service_test.go

package service

import (
	"testing"

	"github.com/stretchr/testify/require"
)

func TestGetModelPricing_Gpt53CodexSparkUsesGpt51CodexPricing(t *testing.T) {
	sparkPricing := &LiteLLMModelPricing{InputCostPerToken: 1}
	gpt53Pricing := &LiteLLMModelPricing{InputCostPerToken: 9}

	svc := &PricingService{
		pricingData: map[string]*LiteLLMModelPricing{
			"gpt-5.1-codex": sparkPricing,
			"gpt-5.3":       gpt53Pricing,
		},
	}

	got := svc.GetModelPricing("gpt-5.3-codex-spark")
	require.Same(t, sparkPricing, got)
}

func TestGetModelPricing_Gpt53CodexFallbackStillUsesGpt52Codex(t *testing.T) {
	gpt52CodexPricing := &LiteLLMModelPricing{InputCostPerToken: 2}

	svc := &PricingService{
		pricingData: map[string]*LiteLLMModelPricing{
			"gpt-5.2-codex": gpt52CodexPricing,
		},
	}

	got := svc.GetModelPricing("gpt-5.3-codex")
	require.Same(t, gpt52CodexPricing, got)
}

func TestGetModelPricing_OpenAIFallbackMatchedLoggedAsInfo(t *testing.T) {
	logSink, restore := captureStructuredLog(t)
	defer restore()

	gpt52CodexPricing := &LiteLLMModelPricing{InputCostPerToken: 2}
	svc := &PricingService{
		pricingData: map[string]*LiteLLMModelPricing{
			"gpt-5.2-codex": gpt52CodexPricing,
		},
	}

	got := svc.GetModelPricing("gpt-5.3-codex")
	require.Same(t, gpt52CodexPricing, got)

	require.True(t, logSink.ContainsMessageAtLevel("[Pricing] OpenAI fallback matched gpt-5.3-codex -> gpt-5.2-codex", "info"))
	require.False(t, logSink.ContainsMessageAtLevel("[Pricing] OpenAI fallback matched gpt-5.3-codex -> gpt-5.2-codex", "warn"))
}

func TestGetModelPricing_Gpt54UsesStaticFallbackWhenRemoteMissing(t *testing.T) {
	svc := &PricingService{
		pricingData: map[string]*LiteLLMModelPricing{
			"gpt-5.1-codex": &LiteLLMModelPricing{InputCostPerToken: 1.25e-6},
		},
	}

	got := svc.GetModelPricing("gpt-5.4")
	require.NotNil(t, got)
	require.InDelta(t, 2.5e-6, got.InputCostPerToken, 1e-12)
	require.InDelta(t, 1.5e-5, got.OutputCostPerToken, 1e-12)
	require.InDelta(t, 2.5e-7, got.CacheReadInputTokenCost, 1e-12)
	require.Equal(t, 272000, got.LongContextInputTokenThreshold)
	require.InDelta(t, 2.0, got.LongContextInputCostMultiplier, 1e-12)
	require.InDelta(t, 1.5, got.LongContextOutputCostMultiplier, 1e-12)
}