test: add comprehensive test harness across all packages (156 tests)

Characterization tests capturing current behavior before refactoring.
Covers auth, config, logging, proxy, ratelimit, server, and telemetry
packages with race-safe concurrent access tests.
This commit is contained in:
Alexander
2026-04-15 10:40:43 +02:00
parent d3fbfe8b42
commit 9150f466e5
13 changed files with 4325 additions and 0 deletions
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package ratelimit
import (
"net/http"
"testing"
"time"
)
func TestNewTracker(t *testing.T) {
called := false
tr := NewTracker(func() string {
called = true
return "tok"
})
if tr == nil {
t.Fatal("NewTracker returned nil")
}
// tokenFn stored but not called during construction
if called {
t.Error("tokenFn should not be called by NewTracker")
}
// Invoke to verify it's wired
if got := tr.tokenFn(); got != "tok" {
t.Errorf("tokenFn() = %q, want tok", got)
}
}
func TestUpdateFromHeaders_Full(t *testing.T) {
tr := NewTracker(func() string { return "" })
h := http.Header{}
h.Set("Anthropic-Ratelimit-Unified-5h-Utilization", "0.42")
h.Set("Anthropic-Ratelimit-Unified-5h-Reset", "1700000000")
h.Set("Anthropic-Ratelimit-Unified-7d-Utilization", "0.75")
h.Set("Anthropic-Ratelimit-Unified-7d-Reset", "1700100000")
tr.UpdateFromHeaders(h)
fh := tr.FiveHour()
if fh.Utilization != 42.0 {
t.Errorf("FiveHour.Utilization = %f, want 42.0", fh.Utilization)
}
wantReset5h := time.Unix(1700000000, 0).UTC().Truncate(time.Minute)
if !fh.ResetsAt.Equal(wantReset5h) {
t.Errorf("FiveHour.ResetsAt = %v, want %v", fh.ResetsAt, wantReset5h)
}
sd := tr.SevenDay()
if sd.Utilization != 75.0 {
t.Errorf("SevenDay.Utilization = %f, want 75.0", sd.Utilization)
}
wantReset7d := time.Unix(1700100000, 0).UTC().Truncate(time.Minute)
if !sd.ResetsAt.Equal(wantReset7d) {
t.Errorf("SevenDay.ResetsAt = %v, want %v", sd.ResetsAt, wantReset7d)
}
}
func TestUpdateFromHeaders_Partial(t *testing.T) {
tr := NewTracker(func() string { return "" })
// Only set 5h utilization, no reset, no 7d
h := http.Header{}
h.Set("Anthropic-Ratelimit-Unified-5h-Utilization", "0.33")
tr.UpdateFromHeaders(h)
fh := tr.FiveHour()
if fh.Utilization != 33.0 {
t.Errorf("FiveHour.Utilization = %f, want 33.0", fh.Utilization)
}
if !fh.ResetsAt.IsZero() {
t.Errorf("FiveHour.ResetsAt should be zero, got %v", fh.ResetsAt)
}
sd := tr.SevenDay()
if sd.Utilization != 0 {
t.Errorf("SevenDay.Utilization = %f, want 0", sd.Utilization)
}
}
func TestUpdateFromHeaders_Missing(t *testing.T) {
tr := NewTracker(func() string { return "" })
// Pre-set some state
tr.mu.Lock()
tr.fiveHour.Utilization = 50.0
tr.mu.Unlock()
// Update with empty headers — should not change state
tr.UpdateFromHeaders(http.Header{})
fh := tr.FiveHour()
if fh.Utilization != 50.0 {
t.Errorf("FiveHour.Utilization = %f, want 50.0 (unchanged)", fh.Utilization)
}
}
func TestUpdateFromHeaders_InvalidValues(t *testing.T) {
tr := NewTracker(func() string { return "" })
h := http.Header{}
h.Set("Anthropic-Ratelimit-Unified-5h-Utilization", "not-a-number")
h.Set("Anthropic-Ratelimit-Unified-5h-Reset", "not-a-timestamp")
tr.UpdateFromHeaders(h)
fh := tr.FiveHour()
if fh.Utilization != 0 {
t.Errorf("Utilization should stay 0 for invalid input, got %f", fh.Utilization)
}
if !fh.ResetsAt.IsZero() {
t.Errorf("ResetsAt should stay zero for invalid input, got %v", fh.ResetsAt)
}
}
func TestSonnet_Snapshot(t *testing.T) {
tr := NewTracker(func() string { return "" })
// Sonnet is only set via poll/updateWindow, not UpdateFromHeaders
// Verify it starts at zero
s := tr.Sonnet()
if s.Utilization != 0 {
t.Errorf("Sonnet.Utilization = %f, want 0", s.Utilization)
}
if !s.ResetsAt.IsZero() {
t.Errorf("Sonnet.ResetsAt should be zero, got %v", s.ResetsAt)
}
}
func TestExtra_Default(t *testing.T) {
tr := NewTracker(func() string { return "" })
extra := tr.Extra()
if extra.IsEnabled {
t.Error("Extra.IsEnabled should be false by default")
}
if extra.MonthlyLimit != nil {
t.Error("Extra.MonthlyLimit should be nil by default")
}
}
func TestUpdateWindow(t *testing.T) {
tr := NewTracker(func() string { return "" })
tests := []struct {
name string
util *float64
resetsAt *string
wantUtil float64
wantResetOK bool
}{
{
name: "both fields",
util: float64Ptr(65.5),
resetsAt: stringPtr("2024-01-15T10:30:45Z"),
wantUtil: 65.5,
wantResetOK: true,
},
{
name: "utilization only",
util: float64Ptr(30.0),
resetsAt: nil,
wantUtil: 30.0,
wantResetOK: false,
},
{
name: "reset only (RFC3339Nano)",
util: nil,
resetsAt: stringPtr("2024-06-01T12:00:00.123456789Z"),
wantUtil: 0,
wantResetOK: true,
},
{
name: "nil both",
util: nil,
resetsAt: nil,
wantUtil: 0,
wantResetOK: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
w := &Window{}
rl := &RateLimit{
Utilization: tt.util,
ResetsAt: tt.resetsAt,
}
tr.updateWindow(w, rl)
if w.Utilization != tt.wantUtil {
t.Errorf("Utilization = %f, want %f", w.Utilization, tt.wantUtil)
}
if tt.wantResetOK {
if w.ResetsAt.IsZero() {
t.Error("ResetsAt should be set")
}
// Verify truncation to minute
if w.ResetsAt.Second() != 0 || w.ResetsAt.Nanosecond() != 0 {
t.Errorf("ResetsAt not truncated to minute: %v", w.ResetsAt)
}
if w.ResetsAt.Location() != time.UTC {
t.Errorf("ResetsAt not in UTC: %v", w.ResetsAt.Location())
}
} else if tt.resetsAt == nil {
if !w.ResetsAt.IsZero() {
t.Errorf("ResetsAt should be zero when input is nil, got %v", w.ResetsAt)
}
}
})
}
}
func TestUpdateWindow_InvalidTime(t *testing.T) {
tr := NewTracker(func() string { return "" })
w := &Window{}
bad := "not-a-time"
rl := &RateLimit{ResetsAt: &bad}
tr.updateWindow(w, rl)
if !w.ResetsAt.IsZero() {
t.Errorf("ResetsAt should stay zero for invalid time, got %v", w.ResetsAt)
}
}
func TestPoll_SetsStateFromUsageResponse(t *testing.T) {
// White-box: directly set fields that poll would set after fetchUsage
tr := NewTracker(func() string { return "" })
// Simulate what poll does after fetching usage
tr.mu.Lock()
usage := &UsageResponse{
FiveHour: &RateLimit{Utilization: float64Ptr(55.5), ResetsAt: stringPtr("2024-03-01T08:00:00Z")},
SevenDay: &RateLimit{Utilization: float64Ptr(22.3), ResetsAt: stringPtr("2024-03-07T00:00:00Z")},
SevenDaySonnet: &RateLimit{Utilization: float64Ptr(10.0), ResetsAt: stringPtr("2024-03-07T00:00:00Z")},
ExtraUsage: &ExtraUsage{IsEnabled: true, MonthlyLimit: float64Ptr(100.0), UsedCredits: float64Ptr(42.5)},
}
if usage.FiveHour != nil {
tr.updateWindow(&tr.fiveHour, usage.FiveHour)
}
if usage.SevenDay != nil {
tr.updateWindow(&tr.sevenDay, usage.SevenDay)
}
if usage.SevenDaySonnet != nil {
tr.updateWindow(&tr.sonnet, usage.SevenDaySonnet)
}
if usage.ExtraUsage != nil {
tr.extra = *usage.ExtraUsage
}
tr.mu.Unlock()
fh := tr.FiveHour()
if fh.Utilization != 55.5 {
t.Errorf("FiveHour.Utilization = %f, want 55.5", fh.Utilization)
}
sd := tr.SevenDay()
if sd.Utilization != 22.3 {
t.Errorf("SevenDay.Utilization = %f, want 22.3", sd.Utilization)
}
sn := tr.Sonnet()
if sn.Utilization != 10.0 {
t.Errorf("Sonnet.Utilization = %f, want 10.0", sn.Utilization)
}
extra := tr.Extra()
if !extra.IsEnabled {
t.Error("Extra.IsEnabled = false, want true")
}
if extra.MonthlyLimit == nil || *extra.MonthlyLimit != 100.0 {
t.Errorf("Extra.MonthlyLimit = %v, want 100.0", extra.MonthlyLimit)
}
if extra.UsedCredits == nil || *extra.UsedCredits != 42.5 {
t.Errorf("Extra.UsedCredits = %v, want 42.5", extra.UsedCredits)
}
}
func float64Ptr(f float64) *float64 { return &f }
func stringPtr(s string) *string { return &s }
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package ratelimit
import (
"context"
"encoding/json"
"net/http"
"net/http/httptest"
"strings"
"testing"
)
func TestUsageResponse_FullJSON(t *testing.T) {
raw := `{
"five_hour": {"utilization": 42.5, "resets_at": "2024-01-15T10:30:00Z"},
"seven_day": {"utilization": 75.0, "resets_at": "2024-01-20T00:00:00Z"},
"seven_day_sonnet": {"utilization": 10.0, "resets_at": "2024-01-20T00:00:00Z"},
"extra_usage": {
"is_enabled": true,
"monthly_limit": 100.0,
"used_credits": 42.5,
"utilization": 42.5
}
}`
var resp UsageResponse
if err := json.Unmarshal([]byte(raw), &resp); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if resp.FiveHour == nil {
t.Fatal("FiveHour is nil")
}
if resp.FiveHour.Utilization == nil || *resp.FiveHour.Utilization != 42.5 {
t.Errorf("FiveHour.Utilization = %v, want 42.5", resp.FiveHour.Utilization)
}
if resp.FiveHour.ResetsAt == nil || *resp.FiveHour.ResetsAt != "2024-01-15T10:30:00Z" {
t.Errorf("FiveHour.ResetsAt = %v", resp.FiveHour.ResetsAt)
}
if resp.SevenDay == nil {
t.Fatal("SevenDay is nil")
}
if resp.SevenDay.Utilization == nil || *resp.SevenDay.Utilization != 75.0 {
t.Errorf("SevenDay.Utilization = %v, want 75.0", resp.SevenDay.Utilization)
}
if resp.SevenDaySonnet == nil {
t.Fatal("SevenDaySonnet is nil")
}
if resp.SevenDaySonnet.Utilization == nil || *resp.SevenDaySonnet.Utilization != 10.0 {
t.Errorf("SevenDaySonnet.Utilization = %v", resp.SevenDaySonnet.Utilization)
}
if resp.ExtraUsage == nil {
t.Fatal("ExtraUsage is nil")
}
if !resp.ExtraUsage.IsEnabled {
t.Error("ExtraUsage.IsEnabled = false, want true")
}
if resp.ExtraUsage.MonthlyLimit == nil || *resp.ExtraUsage.MonthlyLimit != 100.0 {
t.Errorf("ExtraUsage.MonthlyLimit = %v, want 100.0", resp.ExtraUsage.MonthlyLimit)
}
if resp.ExtraUsage.UsedCredits == nil || *resp.ExtraUsage.UsedCredits != 42.5 {
t.Errorf("ExtraUsage.UsedCredits = %v, want 42.5", resp.ExtraUsage.UsedCredits)
}
if resp.ExtraUsage.Utilization == nil || *resp.ExtraUsage.Utilization != 42.5 {
t.Errorf("ExtraUsage.Utilization = %v, want 42.5", resp.ExtraUsage.Utilization)
}
}
func TestUsageResponse_PartialJSON(t *testing.T) {
raw := `{"five_hour": {"utilization": 10.0}}`
var resp UsageResponse
if err := json.Unmarshal([]byte(raw), &resp); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if resp.FiveHour == nil {
t.Fatal("FiveHour is nil")
}
if resp.FiveHour.Utilization == nil || *resp.FiveHour.Utilization != 10.0 {
t.Errorf("FiveHour.Utilization = %v, want 10.0", resp.FiveHour.Utilization)
}
if resp.FiveHour.ResetsAt != nil {
t.Errorf("FiveHour.ResetsAt should be nil, got %v", resp.FiveHour.ResetsAt)
}
if resp.SevenDay != nil {
t.Errorf("SevenDay should be nil, got %v", resp.SevenDay)
}
if resp.SevenDaySonnet != nil {
t.Errorf("SevenDaySonnet should be nil, got %v", resp.SevenDaySonnet)
}
if resp.ExtraUsage != nil {
t.Errorf("ExtraUsage should be nil, got %v", resp.ExtraUsage)
}
}
func TestUsageResponse_EmptyJSON(t *testing.T) {
var resp UsageResponse
if err := json.Unmarshal([]byte(`{}`), &resp); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if resp.FiveHour != nil || resp.SevenDay != nil || resp.SevenDaySonnet != nil || resp.ExtraUsage != nil {
t.Error("all fields should be nil for empty JSON")
}
}
func TestFetchUsage_Success(t *testing.T) {
srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Verify request headers
if got := r.Header.Get("Authorization"); got != "Bearer test-token" {
t.Errorf("Authorization = %q, want 'Bearer test-token'", got)
}
if got := r.Header.Get("Content-Type"); got != "application/json" {
t.Errorf("Content-Type = %q, want application/json", got)
}
if got := r.Header.Get("anthropic-beta"); got != "oauth-2025-04-20" {
t.Errorf("anthropic-beta = %q, want oauth-2025-04-20", got)
}
if got := r.Header.Get("User-Agent"); got != "claude-cli/2.1.92" {
t.Errorf("User-Agent = %q, want claude-cli/2.1.92", got)
}
if r.Method != http.MethodGet {
t.Errorf("Method = %q, want GET", r.Method)
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
_, _ = w.Write([]byte(`{
"five_hour": {"utilization": 50.0, "resets_at": "2024-01-15T10:00:00Z"},
"seven_day": {"utilization": 25.0, "resets_at": "2024-01-20T00:00:00Z"}
}`))
}))
defer srv.Close()
// fetchUsage hardcodes usageURL, but we can test via the mock by temporarily
// using http.DefaultClient's transport. Instead, we test the handler directly.
// The httptest server validates our request expectations above.
// Make a real request to the test server to verify handler behavior
req, _ := http.NewRequestWithContext(context.Background(), http.MethodGet, srv.URL, nil)
req.Header.Set("Authorization", "Bearer test-token")
req.Header.Set("Content-Type", "application/json")
req.Header.Set("anthropic-beta", "oauth-2025-04-20")
req.Header.Set("User-Agent", "claude-cli/2.1.92")
resp, err := http.DefaultClient.Do(req)
if err != nil {
t.Fatalf("request failed: %v", err)
}
defer resp.Body.Close()
var usage UsageResponse
if err := json.NewDecoder(resp.Body).Decode(&usage); err != nil {
t.Fatalf("decode: %v", err)
}
if usage.FiveHour == nil || *usage.FiveHour.Utilization != 50.0 {
t.Errorf("FiveHour.Utilization = %v, want 50.0", usage.FiveHour)
}
if usage.SevenDay == nil || *usage.SevenDay.Utilization != 25.0 {
t.Errorf("SevenDay.Utilization = %v, want 25.0", usage.SevenDay)
}
}
func TestFetchUsage_Non200(t *testing.T) {
srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusForbidden)
_, _ = w.Write([]byte(`{"error":"forbidden"}`))
}))
defer srv.Close()
// Simulate the error path: non-200 returns error with status and body
resp, err := http.Get(srv.URL)
if err != nil {
t.Fatalf("request: %v", err)
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusOK {
t.Fatal("expected non-200 status")
}
// This matches the fetchUsage error format
body := make([]byte, 1024)
n, _ := resp.Body.Read(body)
bodyStr := string(body[:n])
if !strings.Contains(bodyStr, "forbidden") {
t.Errorf("body = %q, want it to contain 'forbidden'", bodyStr)
}
}
func TestFetchUsage_MalformedJSON(t *testing.T) {
raw := `{not valid json`
var resp UsageResponse
err := json.Unmarshal([]byte(raw), &resp)
if err == nil {
t.Fatal("expected decode error for malformed JSON")
}
}
func TestRateLimit_NilFields(t *testing.T) {
raw := `{}`
var rl RateLimit
if err := json.Unmarshal([]byte(raw), &rl); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if rl.Utilization != nil {
t.Errorf("Utilization should be nil, got %v", rl.Utilization)
}
if rl.ResetsAt != nil {
t.Errorf("ResetsAt should be nil, got %v", rl.ResetsAt)
}
}
func TestExtraUsage_JSON(t *testing.T) {
raw := `{"is_enabled":false,"monthly_limit":null,"used_credits":null,"utilization":null}`
var eu ExtraUsage
if err := json.Unmarshal([]byte(raw), &eu); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if eu.IsEnabled {
t.Error("IsEnabled should be false")
}
if eu.MonthlyLimit != nil {
t.Error("MonthlyLimit should be nil")
}
if eu.UsedCredits != nil {
t.Error("UsedCredits should be nil")
}
if eu.Utilization != nil {
t.Error("Utilization should be nil")
}
}
func TestUsageURL_Constant(t *testing.T) {
if usageURL != "https://api.anthropic.com/api/oauth/usage" {
t.Errorf("usageURL = %q, want https://api.anthropic.com/api/oauth/usage", usageURL)
}
}