| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "os" |
| 5 | "path/filepath" |
| 6 | "strings" |
| 7 | "testing" |
| 8 | |
| 9 | "github.com/BurntSushi/toml" |
| 10 | ) |
| 11 | |
| 12 | const twoProviderConfig = ` |
| 13 | [[providers]] |
| 14 | name = "deepseek" |
| 15 | kind = "openai" |
| 16 | base_url = "https://api.deepseek.com" |
| 17 | models = ["deepseek-v4-flash", "deepseek-v4-pro"] |
| 18 | api_key_env = "DEEPSEEK_API_KEY" |
| 19 | |
| 20 | [[providers]] |
| 21 | name = "kimi" |
| 22 | kind = "openai" |
| 23 | base_url = "https://api.moonshot.cn/v1" |
| 24 | models = ["kimi-k2"] |
| 25 | api_key_env = "MOONSHOT_API_KEY" |
| 26 | ` |
| 27 | |
| 28 | func writeConfig(t *testing.T, body string) string { |
| 29 | t.Helper() |
| 30 | path := filepath.Join(t.TempDir(), "config.toml") |
| 31 | if err := os.WriteFile(path, []byte(body), 0o644); err != nil { |
| 32 | t.Fatal(err) |
| 33 | } |
| 34 | return path |
| 35 | } |
| 36 | |
| 37 | func readProviders(t *testing.T, dir string) []map[string]any { |
| 38 | t.Helper() |
| 39 | raw, err := os.ReadFile(filepath.Join(dir, "config.toml")) |
| 40 | if err != nil { |
| 41 | t.Fatalf("read metered config: %v", err) |
| 42 | } |
| 43 | var doc map[string]any |
| 44 | if err := toml.Unmarshal(raw, &doc); err != nil { |
| 45 | t.Fatalf("parse metered config: %v", err) |
| 46 | } |
| 47 | var out []map[string]any |
| 48 | switch list := doc["providers"].(type) { |
| 49 | case []map[string]any: |
| 50 | out = list |
| 51 | case []any: |
| 52 | for _, entry := range list { |
| 53 | p, _ := entry.(map[string]any) |
| 54 | out = append(out, p) |
| 55 | } |
| 56 | } |
| 57 | return out |
| 58 | } |
| 59 | |
| 60 | func TestMeterUpstreamFindsTheProviderServingTheModel(t *testing.T) { |
| 61 | path := writeConfig(t, twoProviderConfig) |
| 62 | got, err := meterUpstream(path, "kimi-k2") |
| 63 | if err != nil { |
| 64 | t.Fatalf("meterUpstream: %v", err) |
| 65 | } |
| 66 | if got != "https://api.moonshot.cn/v1" { |
| 67 | t.Fatalf("upstream = %q, want the provider that serves the model", got) |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | func TestMeterUpstreamAcceptsAVendorQualifiedModel(t *testing.T) { |
| 72 | path := writeConfig(t, twoProviderConfig) |
| 73 | got, err := meterUpstream(path, "Kimi/kimi-k2") |
| 74 | if err != nil { |
| 75 | t.Fatalf("meterUpstream: %v", err) |
| 76 | } |
| 77 | if got != "https://api.moonshot.cn/v1" { |
| 78 | t.Fatalf("upstream = %q, want the vendor prefix stripped before matching", got) |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | func TestMeterUpstreamFallsBackToTheFirstProvider(t *testing.T) { |
| 83 | path := writeConfig(t, twoProviderConfig) |
| 84 | got, err := meterUpstream(path, "") |
| 85 | if err != nil { |
| 86 | t.Fatalf("meterUpstream: %v", err) |
| 87 | } |
| 88 | if got != "https://api.deepseek.com" { |
| 89 | t.Fatalf("upstream = %q, want the first provider", got) |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | // Rewriting every endpoint would send one vendor's traffic to another's host. |
| 94 | func TestWriteMeteredConfigRedirectsOnlyTheBenchmarkedProvider(t *testing.T) { |
| 95 | path := writeConfig(t, twoProviderConfig) |
| 96 | dir := t.TempDir() |
| 97 | if err := writeMeteredConfig(path, dir, "kimi-k2", "http://127.0.0.1:9999"); err != nil { |
| 98 | t.Fatalf("writeMeteredConfig: %v", err) |
| 99 | } |
| 100 | providers := readProviders(t, dir) |
| 101 | if len(providers) != 2 { |
| 102 | t.Fatalf("providers = %d, want both preserved", len(providers)) |
| 103 | } |
| 104 | byName := map[string]map[string]any{} |
| 105 | for _, p := range providers { |
| 106 | name, _ := p["name"].(string) |
| 107 | byName[name] = p |
| 108 | } |
| 109 | if got := byName["kimi"]["base_url"]; got != "http://127.0.0.1:9999" { |
| 110 | t.Fatalf("kimi base_url = %v, want the meter", got) |
| 111 | } |
| 112 | if got := byName["deepseek"]["base_url"]; got != "https://api.deepseek.com" { |
| 113 | t.Fatalf("deepseek base_url = %v, want it left alone", got) |
| 114 | } |
| 115 | if got := byName["kimi"]["no_proxy"]; got != true { |
| 116 | t.Fatalf("no_proxy = %v, want true: the meter is loopback plaintext", got) |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | // The key lives in an env var the child inherits, so metering must never need |
| 121 | // to read, copy, or rewrite a credential. |
| 122 | func TestWriteMeteredConfigKeepsCredentialsUntouched(t *testing.T) { |
| 123 | path := writeConfig(t, twoProviderConfig) |
| 124 | dir := t.TempDir() |
| 125 | if err := writeMeteredConfig(path, dir, "deepseek-v4-flash", "http://127.0.0.1:1"); err != nil { |
| 126 | t.Fatalf("writeMeteredConfig: %v", err) |
| 127 | } |
| 128 | raw, err := os.ReadFile(filepath.Join(dir, "config.toml")) |
| 129 | if err != nil { |
| 130 | t.Fatal(err) |
| 131 | } |
| 132 | if !strings.Contains(string(raw), "DEEPSEEK_API_KEY") { |
| 133 | t.Fatalf("api_key_env was dropped:\n%s", raw) |
| 134 | } |
| 135 | if strings.Contains(string(raw), "api_key =") { |
| 136 | t.Fatalf("a literal key appeared in the metered config:\n%s", raw) |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | func TestMeterUpstreamRejectsAConfigWithNoProviders(t *testing.T) { |
| 141 | path := writeConfig(t, "model = \"x\"\n") |
| 142 | if _, err := meterUpstream(path, ""); err == nil { |
| 143 | t.Fatal("a config with no providers must fail loudly, not meter nothing") |
| 144 | } |
| 145 | } |
| 146 |