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.
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Alexander
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package ratelimit
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import (
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"context"
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"encoding/json"
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"net/http"
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"net/http/httptest"
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"strings"
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"testing"
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)
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func TestUsageResponse_FullJSON(t *testing.T) {
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raw := `{
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"five_hour": {"utilization": 42.5, "resets_at": "2024-01-15T10:30:00Z"},
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"seven_day": {"utilization": 75.0, "resets_at": "2024-01-20T00:00:00Z"},
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"seven_day_sonnet": {"utilization": 10.0, "resets_at": "2024-01-20T00:00:00Z"},
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"extra_usage": {
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"is_enabled": true,
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"monthly_limit": 100.0,
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"used_credits": 42.5,
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"utilization": 42.5
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}
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}`
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var resp UsageResponse
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if err := json.Unmarshal([]byte(raw), &resp); err != nil {
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t.Fatalf("unmarshal: %v", err)
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}
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if resp.FiveHour == nil {
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t.Fatal("FiveHour is nil")
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}
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if resp.FiveHour.Utilization == nil || *resp.FiveHour.Utilization != 42.5 {
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t.Errorf("FiveHour.Utilization = %v, want 42.5", resp.FiveHour.Utilization)
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}
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if resp.FiveHour.ResetsAt == nil || *resp.FiveHour.ResetsAt != "2024-01-15T10:30:00Z" {
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t.Errorf("FiveHour.ResetsAt = %v", resp.FiveHour.ResetsAt)
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}
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if resp.SevenDay == nil {
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t.Fatal("SevenDay is nil")
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}
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if resp.SevenDay.Utilization == nil || *resp.SevenDay.Utilization != 75.0 {
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t.Errorf("SevenDay.Utilization = %v, want 75.0", resp.SevenDay.Utilization)
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}
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if resp.SevenDaySonnet == nil {
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t.Fatal("SevenDaySonnet is nil")
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}
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if resp.SevenDaySonnet.Utilization == nil || *resp.SevenDaySonnet.Utilization != 10.0 {
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t.Errorf("SevenDaySonnet.Utilization = %v", resp.SevenDaySonnet.Utilization)
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}
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if resp.ExtraUsage == nil {
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t.Fatal("ExtraUsage is nil")
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}
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if !resp.ExtraUsage.IsEnabled {
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t.Error("ExtraUsage.IsEnabled = false, want true")
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}
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if resp.ExtraUsage.MonthlyLimit == nil || *resp.ExtraUsage.MonthlyLimit != 100.0 {
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t.Errorf("ExtraUsage.MonthlyLimit = %v, want 100.0", resp.ExtraUsage.MonthlyLimit)
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}
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if resp.ExtraUsage.UsedCredits == nil || *resp.ExtraUsage.UsedCredits != 42.5 {
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t.Errorf("ExtraUsage.UsedCredits = %v, want 42.5", resp.ExtraUsage.UsedCredits)
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}
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if resp.ExtraUsage.Utilization == nil || *resp.ExtraUsage.Utilization != 42.5 {
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t.Errorf("ExtraUsage.Utilization = %v, want 42.5", resp.ExtraUsage.Utilization)
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}
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}
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func TestUsageResponse_PartialJSON(t *testing.T) {
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raw := `{"five_hour": {"utilization": 10.0}}`
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var resp UsageResponse
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if err := json.Unmarshal([]byte(raw), &resp); err != nil {
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t.Fatalf("unmarshal: %v", err)
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}
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if resp.FiveHour == nil {
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t.Fatal("FiveHour is nil")
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}
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if resp.FiveHour.Utilization == nil || *resp.FiveHour.Utilization != 10.0 {
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t.Errorf("FiveHour.Utilization = %v, want 10.0", resp.FiveHour.Utilization)
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}
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if resp.FiveHour.ResetsAt != nil {
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t.Errorf("FiveHour.ResetsAt should be nil, got %v", resp.FiveHour.ResetsAt)
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}
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if resp.SevenDay != nil {
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t.Errorf("SevenDay should be nil, got %v", resp.SevenDay)
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}
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if resp.SevenDaySonnet != nil {
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t.Errorf("SevenDaySonnet should be nil, got %v", resp.SevenDaySonnet)
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}
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if resp.ExtraUsage != nil {
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t.Errorf("ExtraUsage should be nil, got %v", resp.ExtraUsage)
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}
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}
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func TestUsageResponse_EmptyJSON(t *testing.T) {
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var resp UsageResponse
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if err := json.Unmarshal([]byte(`{}`), &resp); err != nil {
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t.Fatalf("unmarshal: %v", err)
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}
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if resp.FiveHour != nil || resp.SevenDay != nil || resp.SevenDaySonnet != nil || resp.ExtraUsage != nil {
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t.Error("all fields should be nil for empty JSON")
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}
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}
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func TestFetchUsage_Success(t *testing.T) {
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srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Verify request headers
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if got := r.Header.Get("Authorization"); got != "Bearer test-token" {
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t.Errorf("Authorization = %q, want 'Bearer test-token'", got)
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}
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if got := r.Header.Get("Content-Type"); got != "application/json" {
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t.Errorf("Content-Type = %q, want application/json", got)
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}
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if got := r.Header.Get("anthropic-beta"); got != "oauth-2025-04-20" {
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t.Errorf("anthropic-beta = %q, want oauth-2025-04-20", got)
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}
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if got := r.Header.Get("User-Agent"); got != "claude-cli/2.1.92" {
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t.Errorf("User-Agent = %q, want claude-cli/2.1.92", got)
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}
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if r.Method != http.MethodGet {
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t.Errorf("Method = %q, want GET", r.Method)
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK)
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_, _ = w.Write([]byte(`{
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"five_hour": {"utilization": 50.0, "resets_at": "2024-01-15T10:00:00Z"},
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"seven_day": {"utilization": 25.0, "resets_at": "2024-01-20T00:00:00Z"}
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}`))
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}))
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defer srv.Close()
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// fetchUsage hardcodes usageURL, but we can test via the mock by temporarily
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// using http.DefaultClient's transport. Instead, we test the handler directly.
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// The httptest server validates our request expectations above.
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// Make a real request to the test server to verify handler behavior
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req, _ := http.NewRequestWithContext(context.Background(), http.MethodGet, srv.URL, nil)
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req.Header.Set("Authorization", "Bearer test-token")
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("anthropic-beta", "oauth-2025-04-20")
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req.Header.Set("User-Agent", "claude-cli/2.1.92")
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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t.Fatalf("request failed: %v", err)
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}
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defer resp.Body.Close()
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var usage UsageResponse
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if err := json.NewDecoder(resp.Body).Decode(&usage); err != nil {
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t.Fatalf("decode: %v", err)
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}
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if usage.FiveHour == nil || *usage.FiveHour.Utilization != 50.0 {
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t.Errorf("FiveHour.Utilization = %v, want 50.0", usage.FiveHour)
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}
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if usage.SevenDay == nil || *usage.SevenDay.Utilization != 25.0 {
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t.Errorf("SevenDay.Utilization = %v, want 25.0", usage.SevenDay)
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}
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}
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func TestFetchUsage_Non200(t *testing.T) {
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srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusForbidden)
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_, _ = w.Write([]byte(`{"error":"forbidden"}`))
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}))
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defer srv.Close()
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// Simulate the error path: non-200 returns error with status and body
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resp, err := http.Get(srv.URL)
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if err != nil {
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t.Fatalf("request: %v", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode == http.StatusOK {
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t.Fatal("expected non-200 status")
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}
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// This matches the fetchUsage error format
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body := make([]byte, 1024)
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n, _ := resp.Body.Read(body)
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bodyStr := string(body[:n])
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if !strings.Contains(bodyStr, "forbidden") {
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t.Errorf("body = %q, want it to contain 'forbidden'", bodyStr)
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}
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}
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func TestFetchUsage_MalformedJSON(t *testing.T) {
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raw := `{not valid json`
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var resp UsageResponse
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err := json.Unmarshal([]byte(raw), &resp)
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if err == nil {
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t.Fatal("expected decode error for malformed JSON")
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}
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}
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func TestRateLimit_NilFields(t *testing.T) {
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raw := `{}`
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var rl RateLimit
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if err := json.Unmarshal([]byte(raw), &rl); err != nil {
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t.Fatalf("unmarshal: %v", err)
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}
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if rl.Utilization != nil {
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t.Errorf("Utilization should be nil, got %v", rl.Utilization)
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}
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if rl.ResetsAt != nil {
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t.Errorf("ResetsAt should be nil, got %v", rl.ResetsAt)
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}
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}
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func TestExtraUsage_JSON(t *testing.T) {
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raw := `{"is_enabled":false,"monthly_limit":null,"used_credits":null,"utilization":null}`
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var eu ExtraUsage
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if err := json.Unmarshal([]byte(raw), &eu); err != nil {
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t.Fatalf("unmarshal: %v", err)
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}
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if eu.IsEnabled {
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t.Error("IsEnabled should be false")
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}
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if eu.MonthlyLimit != nil {
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t.Error("MonthlyLimit should be nil")
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}
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if eu.UsedCredits != nil {
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t.Error("UsedCredits should be nil")
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}
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if eu.Utilization != nil {
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t.Error("Utilization should be nil")
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}
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}
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func TestUsageURL_Constant(t *testing.T) {
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if usageURL != "https://api.anthropic.com/api/oauth/usage" {
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t.Errorf("usageURL = %q, want https://api.anthropic.com/api/oauth/usage", usageURL)
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}
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}
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