feat(429 handling): now handles 429 correctly

test/test.node.ts

@@ -73,7 +73,7 @@ tap.test('client: should handle query parameters', async () => {
 tap.test('client: should handle timeout configuration', async () => {
   // This test just verifies that the timeout method doesn't throw
   const client = SmartRequest.create()
-    .url('https://httpbin.org/get')
+    .url('https://jsonplaceholder.typicode.com/posts/1')
     .timeout(5000);
 
   const response = await client.get();
@@ -84,7 +84,7 @@ tap.test('client: should handle timeout configuration', async () => {
 tap.test('client: should handle retry configuration', async () => {
   // This test just verifies that the retry method doesn't throw
   const client = SmartRequest.create()
-    .url('https://httpbin.org/get')
+    .url('https://jsonplaceholder.typicode.com/posts/1')
     .retry(1);
 
   const response = await client.get();
@@ -92,4 +92,111 @@ tap.test('client: should handle retry configuration', async () => {
   expect(response.ok).toBeTrue();
 });
 
+tap.test('client: should support keepAlive option for connection reuse', async () => {
+  // Test basic keepAlive functionality
+  const responses = [];
+  
+  // Make multiple requests with keepAlive enabled
+  for (let i = 0; i < 3; i++) {
+    const response = await SmartRequest.create()
+      .url('https://jsonplaceholder.typicode.com/posts/1')
+      .options({ keepAlive: true })
+      .header('X-Request-Number', String(i))
+      .get();
+    
+    expect(response.ok).toBeTrue();
+    responses.push(response);
+  }
+  
+  // Verify all requests succeeded
+  expect(responses).toHaveLength(3);
+  
+  // Also test that keepAlive: false works
+  const responseNoKeepAlive = await SmartRequest.create()
+    .url('https://jsonplaceholder.typicode.com/posts/2')
+    .options({ keepAlive: false })
+    .get();
+    
+  expect(responseNoKeepAlive.ok).toBeTrue();
+  
+  // Verify we can parse the responses
+  const data = await responses[0].json();
+  expect(data).toHaveProperty('id');
+  expect(data.id).toEqual(1);
+});
+
+tap.test('client: should handle 429 rate limiting with default config', async () => {
+  // Test that handle429Backoff can be configured without errors
+  const client = SmartRequest.create()
+    .url('https://jsonplaceholder.typicode.com/posts/1')
+    .handle429Backoff();
+
+  const response = await client.get();
+  expect(response.status).toEqual(200);
+});
+
+tap.test('client: should handle 429 with custom config', async () => {
+  let rateLimitCallbackCalled = false;
+  let attemptCount = 0;
+  let waitTimeReceived = 0;
+
+  const client = SmartRequest.create()
+    .url('https://jsonplaceholder.typicode.com/posts/1')
+    .handle429Backoff({
+      maxRetries: 2,
+      fallbackDelay: 500,
+      maxWaitTime: 5000,
+      onRateLimit: (attempt, waitTime) => {
+        rateLimitCallbackCalled = true;
+        attemptCount = attempt;
+        waitTimeReceived = waitTime;
+      }
+    });
+
+  const response = await client.get();
+  expect(response.status).toEqual(200);
+  
+  // The callback should not have been called for a 200 response
+  expect(rateLimitCallbackCalled).toBeFalse();
+});
+
+tap.test('client: should respect Retry-After header format (seconds)', async () => {
+  // Test the configuration works - actual 429 testing would require a mock server
+  const client = SmartRequest.create()
+    .url('https://jsonplaceholder.typicode.com/posts/1')
+    .handle429Backoff({
+      maxRetries: 1,
+      respectRetryAfter: true
+    });
+
+  const response = await client.get();
+  expect(response.ok).toBeTrue();
+});
+
+tap.test('client: should handle rate limiting with exponential backoff', async () => {
+  // Test exponential backoff configuration
+  const client = SmartRequest.create()
+    .url('https://jsonplaceholder.typicode.com/posts/1')
+    .handle429Backoff({
+      maxRetries: 3,
+      fallbackDelay: 100,
+      backoffFactor: 2,
+      maxWaitTime: 1000
+    });
+
+  const response = await client.get();
+  expect(response.status).toEqual(200);
+});
+
+tap.test('client: should not retry non-429 errors with rate limit handler', async () => {
+  // Test that 404 errors are not retried by rate limit handler
+  const client = SmartRequest.create()
+    .url('https://jsonplaceholder.typicode.com/posts/999999')
+    .handle429Backoff();
+
+  const response = await client.get();
+  expect(response.status).toEqual(404);
+  expect(response.ok).toBeFalse();
+});
+
 tap.start();