netnod/client_test.go at main · libdns/netnod · GitHub

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package netnod

import (
	"context"
	"net/http"
	"net/http/httptest"
	"sync/atomic"
	"testing"
	"time"
)

func TestDoRequest_RetryOn429(t *testing.T) {
	var attempts atomic.Int32

	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		n := attempts.Add(1)
		if n <= 2 {
			w.WriteHeader(http.StatusTooManyRequests)
			return
		}
		w.WriteHeader(http.StatusOK)
		w.Write([]byte(`{}`))
	}))
	defer srv.Close()

	p := &Provider{
		APIToken: "test-token",
		BaseURL:  srv.URL,
	}

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	resp, err := p.doRequest(ctx, http.MethodGet, "/test", nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	resp.Body.Close()

	if got := attempts.Load(); got != 3 {
		t.Fatalf("expected 3 attempts, got %d", got)
	}
}

func TestDoRequest_RetryAfterHeader(t *testing.T) {
	var attempts atomic.Int32

	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		n := attempts.Add(1)
		if n == 1 {
			w.Header().Set("Retry-After", "1")
			w.WriteHeader(http.StatusTooManyRequests)
			return
		}
		w.WriteHeader(http.StatusOK)
		w.Write([]byte(`{}`))
	}))
	defer srv.Close()

	p := &Provider{
		APIToken: "test-token",
		BaseURL:  srv.URL,
	}

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	start := time.Now()
	resp, err := p.doRequest(ctx, http.MethodGet, "/test", nil)
	elapsed := time.Since(start)

	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	resp.Body.Close()

	if elapsed < 900*time.Millisecond {
		t.Fatalf("expected at least ~1s wait from Retry-After, got %v", elapsed)
	}
}

func TestDoRequest_ContextCancelled(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusTooManyRequests)
	}))
	defer srv.Close()

	p := &Provider{
		APIToken: "test-token",
		BaseURL:  srv.URL,
	}

	ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
	defer cancel()

	_, err := p.doRequest(ctx, http.MethodGet, "/test", nil)
	if err == nil {
		t.Fatal("expected error due to context cancellation")
	}
	if ctx.Err() == nil {
		t.Fatal("expected context to be done")
	}
}

func TestDoRequest_SendsBody(t *testing.T) {
	var attempts atomic.Int32

	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		n := attempts.Add(1)
		if n == 1 {
			w.WriteHeader(http.StatusTooManyRequests)
			return
		}
		if r.Header.Get("Content-Type") != "application/json" {
			t.Error("expected Content-Type application/json on retry")
		}
		w.WriteHeader(http.StatusNoContent)
	}))
	defer srv.Close()

	p := &Provider{
		APIToken: "test-token",
		BaseURL:  srv.URL,
	}

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	body := map[string]string{"key": "value"}
	resp, err := p.doRequest(ctx, http.MethodPatch, "/test", body)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	resp.Body.Close()

	if got := attempts.Load(); got != 2 {
		t.Fatalf("expected 2 attempts, got %d", got)
	}
}