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sub2api/backend/internal/handler/admin/usage_query_cache_test.go
T

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package admin
import (
"testing"
"time"
"github.com/Wei-Shaw/sub2api/internal/pkg/usagestats"
"github.com/stretchr/testify/require"
)
func TestUsageStatsCacheKey_StableAndDistinct(t *testing.T) {
start := time.Date(2026, 5, 29, 0, 0, 0, 0, time.UTC)
end := time.Date(2026, 5, 31, 0, 0, 0, 0, time.UTC)
base := usagestats.UsageLogFilters{StartTime: &start, EndTime: &end, Model: "claude-3"}
k1 := usageStatsCacheKey(base)
k2 := usageStatsCacheKey(base)
require.NotEmpty(t, k1)
require.Equal(t, k1, k2, "same filters must produce same key")
other := base
other.Model = "gpt-4o"
require.NotEqual(t, k1, usageStatsCacheKey(other), "different model must change key")
withUser := base
withUser.UserID = 7
require.NotEqual(t, k1, usageStatsCacheKey(withUser), "different user must change key")
}