HTTP Client Testing

A full HTTP request simulation framework for Hibla HTTP Client. Mock responses, simulate network conditions, record every request, and assert on exactly what your application sent, without changing a single line of production code.

Whether you are unit testing a service in isolation, running integration tests against a staging environment, or simulating catastrophic network failures, the testing plugin gives you the tools to do it cleanly and expressively in both Pest and PHPUnit.

Http::startTesting();

Http::mock('POST')
    ->url('https://api.example.com/orders')
    ->expectHeader('Authorization', 'Bearer secret')
    ->expectJson(['item' => 'book', 'qty' => 2])
    ->respondWithStatus(201)
    ->respondJson(['id' => 'ord-001', 'status' => 'confirmed'])
    ->register();

$order = $service->placeOrder(item: 'book', qty: 2);

expect($order->status)->toBe('confirmed');

Http::assertRequestMade('POST', 'https://api.example.com/orders');
Http::assertBearerTokenSent('secret');
Http::assertRequestJsonContains('POST', 'https://api.example.com/orders', ['item' => 'book']);

Http::stopTesting();

Requirements
Installation
Getting Started
- Option 1: Static Facade
- Option 2: Direct Dependency Injection
- Choosing Between the Two
Mocking Requests
- Method Matching
- URL Patterns
- Response Bodies
- Response Headers
- Streaming Body Chunks
- Persistent Mocks
- Latency Simulation
Matching Request Expectations
- Header Matching
- JSON Body Matching
- Body Pattern Matching
- Cookie Matching
- Custom Closure Matcher
Simulating Failures
Retry Sequences
File Operations
- Downloads
- Uploads
Cookie Mocking
Server-Sent Events
- Basic SSE
- Streaming SSE
- SSE Retry Sequences
Network Simulation
Passthrough Mode
Assertions
- Request Assertions
- Header Assertions
- Request Body Assertions
- Cookie Assertions
- Download Assertions
- Upload Assertions
- Stream Assertions
- SSE Assertions
Inspecting Recorded Requests
Debugging
API Reference
Full Test Examples
Development
Credits
License

Requirements

PHP 8.4 or higher
hiblaphp/http-client

Installation

This package is currently in beta. Before installing, ensure your composer.json allows beta releases:

{
    "minimum-stability": "beta",
    "prefer-stable": true
}

composer require hiblaphp/http-client-testing

Requirements:

PHP 8.4+

No additional service providers, configuration files, or boot steps are required. The plugin integrates with the HTTP client automatically once Http::startTesting() is called if using the Http facade.

Getting Started

Option 1: Static Facade (Recommended for Most Projects)

Http::startTesting() swaps the real cURL handler for the testing handler globally. Every Http:: call your application makes is intercepted automatically, with no changes to application code required.

use Hibla\HttpClient\Http;

// Pest
beforeEach(fn () => Http::startTesting());
afterEach(fn () => Http::stopTesting());

// PHPUnit
protected function setUp(): void    { Http::startTesting(); }
protected function tearDown(): void { Http::stopTesting(); }

Use Http::resetTesting() between tests when you want to clear recorded requests and mocks without fully disabling testing mode:

// Pest — useful in a single describe block with many cases
afterEach(fn () => Http::resetTesting());

Option 2: Direct Dependency Injection

If your application wires HTTP clients through a service container or constructor injection, use TestingHttpHandler directly. Because it extends HttpHandler, it can be swapped in anywhere a real handler is expected.

use Hibla\HttpClient\HttpClient;
use Hibla\HttpClient\Testing\TestingHttpHandler;

$handler = new TestingHttpHandler();
$client  = new HttpClient()->withHandler($handler);

// Inject $client into the service under test
$service = new UserService($client);

Configure mocks and run assertions on the handler instance:

$handler->mock('GET')
    ->url('https://api.example.com/users')
    ->respondJson(['users' => []])
    ->register();

$service->listUsers();

$handler->assertRequestMade('GET', 'https://api.example.com/users');
$handler->assertBearerTokenSent('my-token');

With Pest:

use Hibla\HttpClient\HttpClient;
use Hibla\HttpClient\Testing\TestingHttpHandler;

beforeEach(function () {
    $this->handler = new TestingHttpHandler();
    $this->client  = new HttpClient()->withHandler($this->handler);
    $this->service = new UserService($this->client);
});

afterEach(fn () => $this->handler->reset());

it('fetches users', function () {
    $this->handler->mock('GET')
        ->url('https://api.example.com/users')
        ->respondJson(['users' => [['id' => 1]]])
        ->register();

    $users = $this->service->listUsers();

    expect($users)->toHaveCount(1);
    $this->handler->assertRequestMade('GET', 'https://api.example.com/users');
});

Choosing Between the Two

	Facade (`Http::`)	Direct DI
Setup effort	Minimal	Requires wiring
Works with static `Http::` calls	Yes	Only injected client
Works with DI containers	Yes	Yes
Multiple independent handlers	No	Yes
Isolates only one service	No	Yes

All mock builder methods and every assertion available on Http:: are equally available on the TestingHttpHandler instance. There is no difference in capability between the two approaches.

Mocking Requests

All mocking is done through Http::mock() (or $handler->mock() in DI mode), which returns a fluent MockRequestBuilder. You must call ->register() at the end of every chain to activate the mock. A builder that is not registered has no effect and will not intercept any requests.

Http::mock('GET')
    ->url('https://api.example.com/users')
    ->respondWithStatus(200)
    ->respondJson(['users' => []])
    ->register();

Method Matching

Http::mock('GET')->url('...')->respondJson([...])->register();
Http::mock('POST')->url('...')->respondWithStatus(201)->register();
Http::mock('PUT')->url('...')->respondWithStatus(200)->register();
Http::mock('PATCH')->url('...')->respondWithStatus(200)->register();
Http::mock('DELETE')->url('...')->respondWithStatus(204)->register();

// Match any HTTP method
Http::mock('*')->url('https://api.example.com/*')->respondWithStatus(200)->register();

URL Patterns

URL patterns support fnmatch wildcards. Trailing slashes are handled leniently; a pattern without one matches URLs with or without.

Http::mock('GET')->url('https://api.example.com/users/*')->respondJson([...])->register();
Http::mock('GET')->url('https://api.example.com/*/profile')->respondJson([...])->register();
Http::mock('GET')->url('https://*.example.com/*')->respondJson([...])->register();

Response Bodies

// Plain string
Http::mock()->url('...')->respondWith('hello world')->register();

// JSON — automatically sets Content-Type: application/json
Http::mock()->url('...')->respondJson(['id' => 1, 'name' => 'Alice'])->register();

// XML — automatically sets Content-Type: application/xml
Http::mock()->url('...')->respondXml('<user><name>Alice</name></user>')->register();

// Status only
Http::mock()->url('...')->respondWithStatus(204)->register();

// Status with body
Http::mock()->url('...')->respondWithStatus(422)->respondJson(['error' => 'Invalid input'])->register();

Response Headers

Http::mock()
    ->url('...')
    ->respondWithStatus(200)
    ->respondWithHeader('X-Request-Id', 'abc-123')
    ->respondWithHeaders([
        'Cache-Control'         => 'no-cache',
        'X-RateLimit-Remaining' => '99',
    ])
    ->respondJson([...])
    ->register();

Streaming Body Chunks

Http::mock('GET')
    ->url('https://api.example.com/stream')
    ->respondWithChunks([
        '{"type":"start"}' . "\n",
        '{"type":"data","value":1}' . "\n",
        '{"type":"data","value":2}' . "\n",
        '{"type":"end"}' . "\n",
    ])
    ->register();

Persistent Mocks

By default a mock is consumed after being matched once. Use ->persistent() to reuse it across multiple requests:

Http::mock('GET')
    ->url('https://api.example.com/health')
    ->respondWithStatus(200)
    ->respondJson(['status' => 'ok'])
    ->persistent()
    ->register();

Latency Simulation

All latency methods are non-blocking. Delays are applied asynchronously, so concurrent requests are interleaved rather than queuing behind one another. This lets you simulate realistic concurrent workloads without artificially serialising your test requests.

// Fixed delay before responding
Http::mock()->url('...')->latency(0.5)->respondJson([...])->register();

// Slow response alias
Http::mock()->url('...')->slowResponse(2.0)->respondJson([...])->register();

// Random delay chosen once at registration time
Http::mock()->url('...')->randomLatency(0.1, 0.8)->respondJson([...])->register();

// Persistent mock: fresh random delay on every match
Http::mock()->url('...')->randomPersistentLatency(0.05, 0.3)->respondJson([...])->register();

// Per-chunk latency for downloads, streams, and SSE (seconds per 8KB chunk)
// jitter adds a random ±percentage variation to each chunk delay, simulating an unsteady connection
Http::mock()->url('...')->downloadLargeFile(sizeInKB: 512)->dataStreamTransferLatency(0.05, jitter: 0.2)->register();

Matching Request Expectations

Constraints make a mock only match requests that satisfy specific criteria. Unmatched mocks remain in the queue.

Header Matching

Http::mock('POST')
    ->url('https://api.example.com/orders')
    ->expectHeader('Authorization', 'Bearer my-token')
    ->expectHeader('X-Tenant-Id', 'acme')
    ->respondWithStatus(201)
    ->register();

// Multiple headers at once
Http::mock('POST')
    ->url('...')
    ->expectHeaders([
        'Content-Type' => 'application/json',
        'Accept'       => 'application/json',
    ])
    ->respondWithStatus(200)
    ->register();

JSON Body Matching

Http::mock('POST')
    ->url('https://api.example.com/users')
    ->expectJson(['name' => 'Alice', 'role' => 'admin'])
    ->respondWithStatus(201)
    ->register();

Body Pattern Matching

Http::mock('POST')
    ->url('...')
    ->expectBody('*"action":"checkout"*')
    ->respondWithStatus(200)
    ->register();

Cookie Matching

Http::mock('GET')
    ->url('...')
    ->expectCookies(['session' => 'abc123', 'theme' => 'dark'])
    ->respondJson([...])
    ->register();

Custom Closure Matcher

use Hibla\HttpClient\Testing\Utilities\RecordedRequest;

Http::mock('POST')
    ->url('...')
    ->expect(function (RecordedRequest $request): bool {
        $json = $request->getJson();
        return isset($json['amount']) && $json['amount'] > 0;
    })
    ->respondWithStatus(200)
    ->register();

Simulating Failures

Hard Failures

Http::mock()->url('...')->fail('Service unavailable')->register();

Timeouts

Http::mock()->url('...')->timeout(30.0)->register();

// Retryable timeout
Http::mock()->url('...')->timeoutFailure(timeoutAfter: 5.0)->register();

Network Errors

Http::mock()->url('...')->networkError('connection')->register(); // Connection failed
Http::mock()->url('...')->networkError('timeout')->register();    // Connection timed out
Http::mock()->url('...')->networkError('resolve')->register();    // DNS failure
Http::mock()->url('...')->networkError('ssl')->register();        // SSL handshake failure

Retryable Failures

Http::mock()->url('...')->retryableFailure('Connection reset by peer')->register();

Retry Sequences

These helpers automatically register a series of mocks simulating failures before eventual success, making it straightforward to test retry logic without manually registering each mock.

Fail Until Attempt N

Http::mock('POST')
    ->url('https://api.example.com/submit')
    ->failUntilAttempt(3) // fails on attempts 1 and 2, succeeds on 3
    ->register();

Timeout Until Attempt N

Http::mock()->url('...')->timeoutUntilAttempt(3, timeoutAfter: 5.0)->register();

HTTP Status Failures Until Success

Http::mock()->url('...')->statusFailuresUntilAttempt(4, failureStatus: 503)->register();

Custom Failure Sequence

Http::mock()
    ->url('...')
    ->failWithSequence(
        failures: [
            'Connection refused',
            ['error' => 'Gateway timeout', 'retryable' => true, 'delay' => 0.2],
            ['status' => 429],
        ],
        successResponse: ['ok' => true]
    )
    ->register();

Mixed and Intermittent Failures

// Cycles through timeout, connection, DNS, SSL failures until success
Http::mock()->url('...')->mixedFailuresUntilAttempt(5)->register();

// Explicit pattern — true = fail, false = succeed
Http::mock()->url('...')->intermittentFailures([true, false, true, true, false])->register();

Rate Limiting with Exponential Backoff

// Returns 429 with Retry-After on attempts 1–3, 200 on attempt 4
Http::mock()->url('...')->rateLimitedUntilAttempt(4)->register();

Gradually Improving Network

// Simulates network recovery: severe delays early, success eventually
Http::mock()->url('...')->slowlyImproveUntilAttempt(5, maxDelay: 10.0)->register();

File Operations

Mocking File Downloads

Http::mock('GET')
    ->url('https://files.example.com/report.pdf')
    ->downloadFile(
        content:     $pdfContent,
        filename:    'report.pdf',
        contentType: 'application/pdf'
    )
    ->register();

Large file simulation with generated content:

Http::mock('GET')
    ->url('...')
    ->downloadLargeFile(sizeInKB: 512, filename: 'archive.zip')
    ->register();

Slow transfer with per-chunk latency:

Http::mock('GET')
    ->url('...')
    ->downloadLargeFile(sizeInKB: 1024)
    ->dataStreamTransferLatency(seconds: 0.05, jitter: 0.2) // ~50ms ± 20% per 8KB chunk
    ->register();

Mocking File Uploads

Mock the endpoint that receives the upload. The testing handler records the upload source path for assertion:

Http::mock('PUT')
    ->url('https://storage.example.com/uploads/*')
    ->respondWithStatus(200)
    ->respondJson(['uploaded' => true])
    ->register();

Cookie Mocking

Use ->setCookie() or ->setCookies() to add Set-Cookie headers to a mock response. The handler parses and stores them in the cookie jar automatically, exactly as a real response would:

Http::mock('POST')
    ->url('https://auth.example.com/login')
    ->respondWithStatus(200)
    ->setCookie(
        name:     'session',
        value:    'tok-abc123',
        path:     '/',
        secure:   true,
        httpOnly: true,
        sameSite: 'Strict',
        expires:  time() + 3600
    )
    ->register();

// Multiple cookies at once
Http::mock('GET')
    ->url('...')
    ->setCookies([
        'theme' => ['value' => 'dark', 'path' => '/'],
        'lang'  => ['value' => 'en', 'secure' => true],
    ])
    ->register();

Server-Sent Events (SSE)

Important: Every SSE mock must use one of the SSE builder methods such as respondWithSSE(), sseWithEventIds(), sseInfiniteStream(), etc. To register itself as an SSE response. Using respondWith() or respondJson() alone on a mock matched by Http::sse() will cause a runtime error. All SSE builder methods call asSSE() internally.

Basic SSE Response

Http::mock('GET')
    ->url('https://api.example.com/events')
    ->respondWithSSE([
        ['event' => 'connected', 'data' => '{"status":"ready"}', 'id' => '1'],
        ['event' => 'update',    'data' => '{"value":42}',        'id' => '2'],
        ['event' => 'done',      'data' => ''],
    ])
    ->register();

Adding Events Individually

Http::mock('GET')
    ->url('...')
    ->respondWithSSE([]) // initialise as SSE
    ->addSSEEvent(data: '{"status":"ready"}', event: 'connected', id: '1')
    ->addSSEEvent(data: '{"value":42}',       event: 'update',    id: '2')
    ->register();

SSE with Retry Interval

Http::mock('GET')
    ->url('...')
    ->sseWithRetry(events: [['data' => '{"connected":true}']], retryMs: 5000)
    ->register();

SSE with Retry Directive Only

Http::mock('GET')
    ->url('...')
    ->sseWithRetryDirective(retryMs: 3000, events: [['data' => '{"connected":true}']])
    ->register();

SSE with Event IDs

Http::mock('GET')
    ->url('...')
    ->sseWithEventIds([
        ['id' => '1', 'data' => '{"msg":"first"}'],
        ['id' => '2', 'data' => '{"msg":"second"}'],
        ['id' => '3', 'data' => '{"msg":"third"}'],
    ])
    ->register();

SSE with Keepalive Heartbeats

Http::mock('GET')
    ->url('...')
    ->sseWithKeepalive(
        dataEvents:     [
            ['data' => '{"status":"processing"}'],
            ['data' => '{"status":"done"}'],
        ],
        keepaliveCount: 5
    )
    ->register();

SSE — Heartbeat Only

Http::mock('GET')
    ->url('...')
    ->sseHeartbeatOnly(heartbeatCount: 10)
    ->register();

SSE with Multiple Event Types

Http::mock('GET')
    ->url('...')
    ->sseMultipleTypes([
        'price_update' => ['{"symbol":"BTC","price":60000}', '{"symbol":"ETH","price":3000}'],
        'alert'        => [['level' => 'info', 'msg' => 'Market open']],
    ])
    ->register();

SSE with Comment Lines

Http::mock('GET')
    ->url('...')
    ->sseWithComments(
        events:   [['data' => '{"payload":1}'], ['data' => '{"payload":2}']],
        comments: ['keep-alive', 'heartbeat']
    )
    ->register();

SSE — Expect Last-Event-ID (Resumption)

Matches only a reconnection request that carries the specified Last-Event-ID header:

Http::mock('GET')
    ->url('...')
    ->sseExpectLastEventId('42', eventsAfterResume: [
        ['id' => '43', 'data' => '{"msg":"resumed"}'],
        ['id' => '44', 'data' => '{"msg":"continued"}'],
    ])
    ->register();

SSE Disconnection

Http::mock('GET')
    ->url('...')
    ->sseDisconnectAfter(eventsBeforeDisconnect: 3, disconnectError: 'Connection reset')
    ->register();

Streaming SSE (Periodic Emitter)

For realistic time-based streams the periodic emitter sends events one by one on a timer. Control the interval between events using ->dataStreamTransferLatency().

Finite Event List

Http::mock('GET')
    ->url('...')
    ->sseWithPeriodicEvents([
        ['event' => 'tick', 'data' => '{"n":1}', 'id' => '1'],
        ['event' => 'tick', 'data' => '{"n":2}', 'id' => '2'],
        ['event' => 'tick', 'data' => '{"n":3}', 'id' => '3'],
    ])
    ->dataStreamTransferLatency(0.1) // 100ms between events
    ->register();

Limited Events with Generator

Http::mock('GET')
    ->url('...')
    ->sseWithLimitedEvents(
        eventCount:     10,
        eventGenerator: fn (int $i) => [
            'data'  => json_encode(['index' => $i, 'ts' => time()]),
            'id'    => (string) $i,
            'event' => 'message',
        ]
    )
    ->dataStreamTransferLatency(0.05)
    ->register();

Infinite Stream

Runs until the client cancels. Optionally capped with maxEvents:

Http::mock('GET')
    ->url('...')
    ->sseInfiniteStream(
        eventGenerator: fn (int $i) => [
            'event' => 'price',
            'data'  => json_encode(['value' => rand(100, 999)]),
            'id'    => (string) $i,
        ],
        maxEvents: 100
    )
    ->dataStreamTransferLatency(0.2)
    ->register();

Periodic Events then Network Drop

Http::mock('GET')
    ->url('...')
    ->ssePeriodicThenDisconnect(
        eventCount:      5,
        disconnectError: 'Connection lost',
        eventGenerator:  fn (int $i) => [
            'data' => json_encode(['index' => $i]),
            'id'   => (string) $i,
        ]
    )
    ->dataStreamTransferLatency(0.1)
    ->register();

SSE Retry Sequences

These helpers simulate connection instability for testing SSE reconnection logic. All of them register the mock as an SSE response internally, so you do not need to call respondWithSSE() additionally.

Fail Until Attempt N

Http::mock('GET')
    ->url('...')
    ->sseFailUntilAttempt(
        successAttempt: 3,
        successEvents:  [['event' => 'connected', 'data' => '{}']],
        failureError:   'Connection refused'
    )
    ->register();

Timeout Until Attempt N

Http::mock('GET')
    ->url('...')
    ->sseTimeoutUntilAttempt(successAttempt: 3, timeoutAfter: 5.0)
    ->register();

Custom Failure Sequence

Http::mock('GET')
    ->url('...')
    ->sseFailWithSequence(
        failures: [
            'Connection refused',
            ['error' => 'SSL handshake failed', 'retryable' => true, 'delay' => 0.2],
        ],
        successEvents: [['data' => '{"ready":true}']]
    )
    ->register();

Drop After Receiving Events

Http::mock('GET')
    ->url('...')
    ->sseDropAfterEvents(
        eventsBeforeDrop: [
            ['id' => '1', 'data' => '{"msg":"first"}'],
            ['id' => '2', 'data' => '{"msg":"second"}'],
        ],
        dropError: 'Connection lost'
    )
    ->register();

Reconnect from a Specific Event ID

Http::mock('GET')
    ->url('...')
    ->sseReconnectFromEventId(
        lastEventId:      '2',
        eventsAfterResume: [
            ['id' => '3', 'data' => '{"msg":"resumed"}'],
            ['id' => '4', 'data' => '{"msg":"continued"}'],
        ]
    )
    ->register();

Rate Limited Until Success (429)

Http::mock('GET')
    ->url('...')
    ->sseRateLimitedUntilAttempt(successAttempt: 4)
    ->register();

Network Errors Until Success

// Cycles: Connection refused → Connection reset → Timed out → success
Http::mock('GET')
    ->url('...')
    ->sseNetworkErrorsUntilAttempt(successAttempt: 4)
    ->register();

Gradually Improving Connection

Http::mock('GET')
    ->url('...')
    ->sseSlowlyImproveUntilAttempt(successAttempt: 5, maxDelay: 10.0)
    ->register();

Mixed Failure Types

// Cycles: timeout → connection error → DNS → SSL → success
Http::mock('GET')
    ->url('...')
    ->sseMixedFailuresUntilAttempt(successAttempt: 5)
    ->register();

Intermittent Failures

// true = fail, false = succeed
Http::mock('GET')
    ->url('...')
    ->sseIntermittentFailures([true, false, true, true, false])
    ->register();

Network Simulation

The testing handler can inject realistic network conditions globally across all requests, layered on top of per-mock delays.

// Presets
Http::startTesting()->withFastNetwork();      // sub-100ms, ~0% failure
Http::startTesting()->withMobileNetwork();    // 0.5–3s latency, 8% failure rate
Http::startTesting()->withPoorNetwork();      // 1–5s latency, 15% failure rate
Http::startTesting()->withUnstableNetwork();  // high variability, 20% failure rate

// Custom configuration
Http::startTesting()->enableNetworkSimulation([
    'random_delay'            => [0.2, 1.5],  // seconds
    'failure_rate'            => 0.05,         // 5% of requests fail outright
    'timeout_rate'            => 0.03,         // 3% time out
    'connection_failure_rate' => 0.02,         // 2% connection refused
    'retryable_failure_rate'  => 0.08,         // 8% retryable errors
]);

// Global random latency applied on top of per-mock delays
Http::startTesting()->withGlobalRandomLatencey(minSeconds: 0.05, maxSeconds: 0.3);

// Remove global random latency
Http::getTestingHandler()->withoutGlobalrandomLatency();

// Disable all simulation
Http::getTestingHandler()->disableNetworkSimulation();

Passthrough Mode

By default the testing handler throws an UnexpectedRequestException whenever a request is made that does not match any registered mock. This prevents tests from silently hitting a real network.

In some scenarios you may want to mock only specific endpoints while letting everything else go through to the real network. enablePassthrough() enables this:

Http::startTesting()->enablePassthrough();

Or in DI mode:

$handler = new TestingHttpHandler();
$handler->enablePassthrough();

$client = new HttpClient()->withHandler($handler);

How It Works

When passthrough is enabled the handler resolves requests in this order:

Check registered mocks, if one matches, return the mock response as normal.
If no mock matches, forward the request to the real network using the underlying cURL handler.

The mock queue is consumed exactly as it would be without passthrough. A non-persistent mock is removed after being matched, and a persistent mock stays. Only genuinely unmatched requests reach the network.

Recorded Requests and Assertions on Real Requests

Real passthrough requests are recorded to history just like mocked ones. Every assertion and inspection method works on them without any special handling:

Http::startTesting()->enablePassthrough();

// No mock registered — goes to the real network
$response = await Http::get('https://api.example.com/users');

// Still recorded and assertable
Http::assertRequestMade('GET', 'https://api.example.com/users');
Http::assertHeaderSent('Accept', 'application/json');
Http::assertRequestCount(1);

$last = Http::getLastRequest();
echo $last->getUrl();    // https://api.example.com/users
echo $last->getMethod(); // GET

Mixing Mocks and Real Requests

Http::startTesting()->enablePassthrough();

// Mocked — no real request made
Http::mock('POST')
    ->url('https://mailer.example.com/send')
    ->respondWithStatus(200)
    ->register();

// Real network request
$users = await Http::get('https://api.staging.example.com/users');

// Mocked response
$mail = await Http::post('https://mailer.example.com/send', ['to' => '[email protected]']);

// Both are in history
Http::assertRequestCount(2);
Http::assertRequestMade('GET',  'https://api.staging.example.com/users');
Http::assertRequestMade('POST', 'https://mailer.example.com/send');

Disabling Passthrough

Http::getTestingHandler()->disablePassthrough();

Things to Be Aware Of

Passthrough makes tests non-deterministic. Real network calls depend on external services being available, which can cause intermittent failures in CI. Use passthrough deliberately — for integration or contract tests — rather than as a default.

Real requests are not retried by the mock handler. Retry logic is handled by the real HttpHandler pipeline, the same as in production.

Passthrough is disabled by default. You must explicitly call enablePassthrough(). This ensures accidentally unmatched mocks always fail loudly in unit tests.

throwOnUnexpected is automatically disabled when you call enablePassthrough(), since throwing on an unmatched request would contradict letting it through. Calling disablePassthrough() re-enables it.

Assertions

All assertion methods are available as static calls on Http:: or directly on the TestingHttpHandler instance when using DI.

Request Assertions

Http::assertRequestMade('POST', 'https://api.example.com/users');
Http::assertNoRequestsMade();
Http::assertRequestCount(3);
Http::assertRequestNotMade('DELETE', 'https://api.example.com/users/1');
Http::assertSingleRequestTo('https://api.example.com/login');
Http::assertRequestCountTo('https://api.example.com/search', maxCount: 5);

// URL pattern (fnmatch)
Http::assertRequestMatchingUrl('GET', 'https://api.example.com/users/*');

// Ordered sequence
Http::assertRequestSequence([
    ['method' => 'POST', 'url' => 'https://auth.example.com/login'],
    ['method' => 'GET',  'url' => 'https://api.example.com/users'],
]);

// By position in history
Http::assertRequestAtIndex('GET', 'https://api.example.com/users', index: 0);

Header Assertions

All header assertions accept an optional $requestIndex parameter to target a specific request in history.

Http::assertHeaderSent('Authorization');
Http::assertHeaderSent('Authorization', 'Bearer my-token');
Http::assertHeaderSent('X-Tenant-Id', 'acme', requestIndex: 1); // second request
Http::assertHeaderNotSent('X-Debug');
Http::assertHeadersSent(['Content-Type' => 'application/json', 'Accept' => 'application/json']);
Http::assertHeaderMatches('Authorization', '/^Bearer [a-z0-9\-]+$/i');
Http::assertBearerTokenSent('my-token');
Http::assertBearerTokenSent('my-token', requestIndex: 0);
Http::assertContentType('application/json');
Http::assertAcceptHeader('application/json');
Http::assertUserAgent('MyApp/1.0');

Request Body Assertions

Http::assertRequestWithBody('POST', 'https://api.example.com/submit', '{"action":"go"}');
Http::assertRequestBodyContains('POST', 'https://api.example.com/submit', '"action"');
Http::assertRequestBodyMatches('POST', '...', '/^\{"action":\s*"[a-z]+"\}$/');
Http::assertRequestWithEmptyBody('GET', 'https://api.example.com/ping');
Http::assertRequestHasBody('POST', 'https://api.example.com/data');
Http::assertRequestIsJson('POST', 'https://api.example.com/data');

Http::assertRequestWithJson('POST', 'https://api.example.com/users', [
    'name' => 'Alice',
    'role' => 'admin',
]);

Http::assertRequestJsonContains('POST', 'https://api.example.com/users', [
    'role' => 'admin',
]);

// Dot-notation path
Http::assertRequestJsonPath('POST', 'https://api.example.com/orders', 'items.0.sku', 'ABC-001');

Cookie Assertions

// What was sent in requests
Http::assertCookieSent('session');
Http::assertCookieNotSent('tracking');
Http::assertCookieSentToUrl('session', 'https://api.example.com/*');
Http::assertCookieNotSentToUrl('admin_token', 'https://public.example.com/*');

// What is stored in the cookie jar
Http::assertCookieExists('session');
Http::assertCookieValue('theme', 'dark');
Http::assertCookieExpired('old_token');
Http::assertCookieNotExpired('session');
Http::assertCookieIsSecure('session');
Http::assertCookieIsHttpOnly('session');
Http::assertCookieIsHostOnly('tracking');
Http::assertCookieHasAttributes('session', [
    'secure'   => true,
    'httpOnly' => true,
    'path'     => '/',
    'sameSite' => 'Strict',
]);

Download Assertions

Http::assertDownloadMade('https://files.example.com/report.pdf', '/tmp/report.pdf');
Http::assertDownloadMadeToUrl('https://files.example.com/report.pdf');
Http::assertFileDownloaded('/tmp/report.pdf');
Http::assertNoDownloadsMade();
Http::assertDownloadCount(2);
Http::assertDownloadWithMethod('https://files.example.com/report.pdf', 'GET');
Http::assertDownloadWithHeaders('https://files.example.com/report.pdf', [
    'Authorization' => 'Bearer my-token',
]);

Http::assertDownloadedFileExists('/tmp/report.pdf');
Http::assertDownloadedFileContains('/tmp/report.pdf', '%PDF-1.4');
Http::assertDownloadedFileContainsString('/tmp/report.pdf', 'Summary');
Http::assertDownloadedFileSize('/tmp/report.pdf', 204800);
Http::assertDownloadedFileSizeBetween('/tmp/report.pdf', minSize: 100_000, maxSize: 500_000);

Upload Assertions

Http::assertUploadMade('https://storage.example.com/files', '/local/path/file.csv');
Http::assertUploadMadeToUrl('https://storage.example.com/files');
Http::assertNoUploadsMade();
Http::assertUploadCount(1);

Stream Assertions

Http::assertStreamMade('https://api.example.com/stream');
Http::assertStreamWithCallback('https://api.example.com/stream');
Http::assertStreamWithMethod('https://api.example.com/stream', 'POST');
Http::assertStreamWithHeaders('https://api.example.com/stream', ['Accept' => 'text/plain']);
Http::assertNoStreamsMade();
Http::assertStreamCount(1);

SSE Assertions

// Connection presence
Http::assertSSEConnectionMade('https://api.example.com/events');
Http::assertNoSSEConnections();
Http::assertSSEConnectionCount('https://api.example.com/events', expectedCount: 3);
Http::assertSSEConnectionAttempts('https://api.example.com/events', expectedAttempts: 3);
Http::assertSSEConnectionAttemptsAtLeast('https://api.example.com/events', minAttempts: 2);
Http::assertSSEConnectionAttemptsAtMost('https://api.example.com/events', maxAttempts: 5);

// Reconnection behaviour
Http::assertSSEReconnectionOccurred('https://api.example.com/events');
Http::assertFirstSSEConnectionHasNoLastEventId('https://api.example.com/events');
Http::assertSSELastEventId('42');                   // last request
Http::assertSSELastEventId('42', requestIndex: 2);  // specific attempt
Http::assertSSEReconnectionProgression('https://api.example.com/events'); // IDs monotonically increasing

// Headers on SSE connections
Http::assertSSEConnectionAuthenticated('https://api.example.com/events', expectedToken: 'my-token');
Http::assertSSEConnectionHasHeader('https://api.example.com/events', 'X-Tenant-Id', 'acme');
Http::assertSSEConnectionMissingHeader('https://api.example.com/events', 'X-Debug');
Http::assertSSEConnectionRequestedWithProperHeaders('https://api.example.com/events');

// Multiple and ordered connections
Http::assertSSEConnectionsMadeToMultipleUrls([
    'https://api.example.com/events/prices',
    'https://api.example.com/events/alerts',
]);
Http::assertSSEConnectionsInOrder([
    'https://api.example.com/events/auth',
    'https://api.example.com/events/stream',
]);

Inspecting Recorded Requests

$last    = Http::getLastRequest();
$first   = Http::getRequest(0);
$history = Http::getRequestHistory();

// RecordedRequest API
$last->getMethod();                // 'POST'
$last->getUrl();                   // 'https://api.example.com/users'
$last->getHeaders();               // ['content-type' => 'application/json', ...]
$last->getHeader('authorization'); // 'Bearer token' or array for multi-value headers
$last->getHeaderLine('accept');    // 'application/json'
$last->hasHeader('x-debug');       // false
$last->getBody();                  // raw body string
$last->getJson();                  // parsed array or null
$last->isJson();                   // bool
$last->getOptions();               // raw cURL options array

// Filtered views
Http::getRequestsByMethod('POST');
Http::getRequestsTo('https://api.example.com/users');
Http::getDownloadRequests();
Http::getLastDownload();
Http::getFirstDownload();
Http::getDownloadDestination('https://files.example.com/report.pdf');
Http::getUploadRequests();
Http::getLastUpload();
Http::getStreamRequests();
Http::getLastStream();
Http::getFirstStream();
Http::streamHasCallback($request); // bool
Http::getSSEConnectionAttempts('https://api.example.com/events');

Debugging

Http::dumpLastRequest();            // prints method, URL, headers, body
Http::dumpRequestsByMethod('POST');
Http::dumpDownloads();
Http::dumpLastDownload();
Http::dumpStreams();
Http::dumpLastStream();

API Reference

`TestingHttpHandler` / `Http::` — Testing Lifecycle

Method	Description
`Http::startTesting()`	Enable testing mode. Returns the `TestingHttpHandler` instance.
`Http::stopTesting()`	Disable testing mode and clear all state.
`Http::resetTesting()`	Clear mocks and history without disabling testing mode.
`Http::getTestingHandler()`	Return the active testing handler. Throws if not in testing mode.
`Http::mock(string $method)`	Create a new `MockRequestBuilder`.
`$handler->reset()`	Clear all mocks, history, cookies, and temp files (DI mode).
`$handler->enablePassthrough()`	Allow unmatched requests to reach the real network.
`$handler->disablePassthrough()`	Restore strict matching — unmatched requests throw.
`$handler->enableNetworkSimulation(array $settings)`	Enable global network simulation.
`$handler->disableNetworkSimulation()`	Disable network simulation.
`$handler->withFastNetwork()`	Preset: sub-100ms, near-zero failure rate.
`$handler->withMobileNetwork()`	Preset: 0.5–3s latency, 8% failure rate.
`$handler->withPoorNetwork()`	Preset: 1–5s latency, 15% failure rate.
`$handler->withUnstableNetwork()`	Preset: high variability, 20% failure rate.
`$handler->withGlobalRandomLatencey(float $min, float $max)`	Add a global random latency range to all requests.
`$handler->withoutGlobalrandomLatency()`	Remove global random latency.

`MockRequestBuilder` — Request Matching

Method	Description
`->url(string $pattern)`	URL pattern to match using `fnmatch` wildcards.
`->expect(callable $callback)`	Custom closure matcher receiving a `RecordedRequest`.
`->expectHeader(string $name, string $value)`	Require a specific header in the request.
`->expectHeaders(array $headers)`	Require multiple headers.
`->expectBody(string $pattern)`	Require the request body to match a pattern.
`->expectJson(array $data)`	Require the request body to match exact JSON.
`->expectCookies(array $cookies)`	Require specific cookies to be present.

`MockRequestBuilder` — Response Configuration

Method	Description
`->respondWithStatus(int $status)`	Set the HTTP response status code.
`->status(int $status)`	Alias for `respondWithStatus()`.
`->respondWith(string $body)`	Set the response body as a plain string.
`->respondJson(array $data)`	Set the response body as JSON. Sets `Content-Type: application/json`.
`->respondXml(string\|\SimpleXMLElement $xml)`	Set the response body as XML. Sets `Content-Type: application/xml`.
`->respondWithHeader(string $name, string\|array $value)`	Add a response header.
`->respondWithHeaders(array $headers)`	Add multiple response headers.
`->respondWithChunks(array $chunks)`	Set a sequence of body chunks to simulate streaming.
`->persistent()`	Make this mock reusable for multiple requests.
`->register()`	Activate the mock. Must be called at the end of every chain.

`MockRequestBuilder` — Latency and Failures

Method	Description
`->latency(float $seconds)`	Fixed delay before responding.
`->slowResponse(float $seconds)`	Alias for `latency()`.
`->randomLatency(float $min, float $max)`	Random delay chosen once at registration.
`->randomPersistentLatency(float $min, float $max)`	Fresh random delay on every match (implies persistent).
`->dataStreamTransferLatency(float $seconds, float $jitter)`	Per-chunk delay for downloads, streams, and SSE.
`->fail(string $error)`	Make the mock fail with a hard error.
`->timeout(float $seconds)`	Simulate a timeout.
`->timeoutFailure(float $timeoutAfter, ?string $message)`	Retryable timeout failure.
`->retryableFailure(string $error)`	Fail with a retryable error.
`->networkError(string $type)`	Simulate a specific network error type (`connection`, `timeout`, `resolve`, `ssl`).

`MockRequestBuilder` — Retry Sequences

Method	Description
`->failUntilAttempt(int $successAttempt, string $error)`	Fail N−1 times, succeed on attempt N.
`->timeoutUntilAttempt(int $successAttempt, float $timeoutAfter)`	Timeout N−1 times, succeed on attempt N.
`->statusFailuresUntilAttempt(int $successAttempt, int $failureStatus)`	Return error status N−1 times, succeed on attempt N.
`->failWithSequence(array $failures, mixed $successResponse)`	Custom sequence of failure types then success.
`->mixedFailuresUntilAttempt(int $successAttempt)`	Cycle through timeout, connection, DNS, SSL failures until success.
`->intermittentFailures(array $pattern)`	Explicit boolean pattern of fails and successes.
`->rateLimitedUntilAttempt(int $successAttempt)`	Return 429 with `Retry-After` until success.
`->slowlyImproveUntilAttempt(int $successAttempt, float $maxDelay)`	Simulate network recovery with decreasing delays.

`MockRequestBuilder` — File Operations

Method	Description
`->downloadFile(string $content, ?string $filename, string $contentType)`	Mock a file download response.
`->downloadLargeFile(int $sizeInKB, ?string $filename)`	Mock a large file download with generated content.

`MockRequestBuilder` — Cookie Mocking

Method	Description
`->setCookie(string $name, string $value, ...)`	Add a `Set-Cookie` header to the response.
`->setCookies(array $cookies)`	Add multiple `Set-Cookie` headers.

`MockRequestBuilder` — SSE

Method	Description
`->respondWithSSE(array $events)`	Configure as an SSE response with a list of events.
`->addSSEEvent(?string $data, ?string $event, ?string $id, ?int $retry)`	Add a single SSE event.
`->sseWithKeepalive(array $dataEvents, int $keepaliveCount)`	SSE with keepalive events between data events.
`->sseHeartbeatOnly(int $heartbeatCount)`	SSE that sends only heartbeat (empty data) events.
`->sseWithRetry(array $events, int $retryMs)`	SSE with a custom `retry` interval field.
`->sseWithRetryDirective(int $retryMs, array $events)`	SSE that sends only a retry directive.
`->sseWithEventIds(array $events)`	SSE with event IDs for reconnection scenarios.
`->sseMultipleTypes(array $eventsByType)`	SSE with multiple named event types.
`->sseWithComments(array $events, array $comments)`	SSE with comment lines interspersed.
`->sseExpectLastEventId(string $id, array $eventsAfterResume)`	Match only requests that carry a specific `Last-Event-ID`.
`->sseDisconnectAfter(int $count, string $error)`	Send N events then simulate a network drop.
`->sseWithPeriodicEvents(array $events)`	Emit events one by one via a timer (use with `dataStreamTransferLatency`).
`->sseWithLimitedEvents(int $count, ?callable $generator)`	Emit N generated events then close.
`->sseInfiniteStream(callable $generator, ?int $maxEvents)`	Emit events indefinitely until the client cancels.
`->ssePeriodicThenDisconnect(int $count, string $error, ?callable $generator)`	Emit N events then simulate a network drop.

`MockRequestBuilder` — SSE Retry Sequences

Method	Description
`->sseFailUntilAttempt(int $successAttempt, array $successEvents, string $error)`	Fail N−1 SSE connections, succeed on attempt N.
`->sseTimeoutUntilAttempt(int $successAttempt, array $successEvents, float $timeout)`	Timeout N−1 SSE connections, succeed on attempt N.
`->sseFailWithSequence(array $failures, array $successEvents)`	Custom sequence of SSE failures then success.
`->sseDropAfterEvents(array $events, string $error, bool $retryable)`	Send events then drop the connection.
`->sseReconnectFromEventId(string $id, array $eventsAfterResume)`	Match reconnection request with a specific `Last-Event-ID`.
`->sseRateLimitedUntilAttempt(int $successAttempt, array $successEvents)`	Return 429 until success.
`->sseNetworkErrorsUntilAttempt(int $successAttempt, array $successEvents)`	Cycle through network errors until success.
`->sseSlowlyImproveUntilAttempt(int $successAttempt, array $successEvents, float $maxDelay)`	Simulate network recovery for SSE connections.
`->sseMixedFailuresUntilAttempt(int $successAttempt)`	Cycle through mixed failure types until success.
`->sseIntermittentFailures(array $pattern)`	Explicit boolean pattern of SSE fails and successes.

Here's the updated section with the name swapped throughout:

Full Test Examples

Pest — Standard HTTP

use Hibla\HttpClient\Http;

beforeEach(fn () => Http::startTesting());
afterEach(fn () => Http::stopTesting());

it('creates a user and returns the new resource', function () {
    Http::mock('POST')
        ->url('https://api.example.com/users')
        ->expectHeader('Authorization', 'Bearer secret')
        ->expectJson(['name' => 'Reymart Calicdan', 'role' => 'admin'])
        ->respondWithStatus(201)
        ->respondJson(['id' => 1, 'name' => 'Reymart Calicdan'])
        ->register();

    $service = new UserService(token: 'secret');
    $user    = $service->create(name: 'Reymart Calicdan', role: 'admin');

    expect($user->id)->toBe(1)
        ->and($user->name)->toBe('Reymart Calicdan');

    Http::assertRequestCount(1);
    Http::assertRequestMade('POST', 'https://api.example.com/users');
    Http::assertBearerTokenSent('secret');
    Http::assertContentType('application/json');
    Http::assertRequestJsonContains('POST', 'https://api.example.com/users', ['role' => 'admin']);
});

it('retries on 503 and eventually succeeds', function () {
    Http::mock('POST')
        ->url('https://api.example.com/orders')
        ->statusFailuresUntilAttempt(successAttempt: 3, failureStatus: 503)
        ->register();

    $result = (new OrderService())->placeOrder(['item' => 'book']);

    expect($result)->toBeTrue();
    Http::assertRequestCount(3);
});

it('downloads a report and writes it to disk', function () {
    Http::mock('GET')
        ->url('https://files.example.com/report.pdf')
        ->downloadFile(content: '%PDF-1.4 fake content', filename: 'report.pdf', contentType: 'application/pdf')
        ->register();

    $destination = Http::getTempPath('report.pdf');
    (new ReportService())->download(destination: $destination);

    Http::assertDownloadMade('https://files.example.com/report.pdf', $destination);
    Http::assertDownloadedFileContainsString($destination, '%PDF-1.4');
});

Pest — SSE

use Hibla\HttpClient\Http;

beforeEach(fn () => Http::startTesting());
afterEach(fn () => Http::stopTesting());

it('receives SSE events and processes them', function () {
    Http::mock('GET')
        ->url('https://api.example.com/events')
        ->respondWithSSE([
            ['event' => 'connected', 'data' => '{"status":"ready"}', 'id' => '1'],
            ['event' => 'update',    'data' => '{"value":42}',        'id' => '2'],
        ])
        ->register();

    $received = [];
    (new EventService())->listen(
        url:     'https://api.example.com/events',
        onEvent: fn ($event) => $received[] = $event
    );

    expect($received)->toHaveCount(2)
        ->and($received[0]->event)->toBe('connected')
        ->and($received[1]->event)->toBe('update');

    Http::assertSSEConnectionMade('https://api.example.com/events');
    Http::assertSSEConnectionRequestedWithProperHeaders('https://api.example.com/events');
});

it('reconnects after a dropped SSE connection using Last-Event-ID', function () {
    Http::mock('GET')
        ->url('https://api.example.com/events')
        ->sseDropAfterEvents(
            eventsBeforeDrop: [
                ['id' => '1', 'data' => '{"msg":"first"}'],
                ['id' => '2', 'data' => '{"msg":"second"}'],
            ],
            dropError: 'Connection lost'
        )
        ->register();

    Http::mock('GET')
        ->url('https://api.example.com/events')
        ->sseExpectLastEventId('2', eventsAfterResume: [
            ['id' => '3', 'data' => '{"msg":"resumed"}'],
        ])
        ->register();

    (new EventService())->listenWithReconnect('https://api.example.com/events');

    Http::assertSSEConnectionAttempts('https://api.example.com/events', expectedAttempts: 2);
    Http::assertSSEReconnectionOccurred('https://api.example.com/events');
    Http::assertFirstSSEConnectionHasNoLastEventId('https://api.example.com/events');
    Http::assertSSELastEventId('2', requestIndex: 1);
    Http::assertSSEReconnectionProgression('https://api.example.com/events');
});

it('streams a periodic price feed', function () {
    Http::mock('GET')
        ->url('https://api.example.com/prices')
        ->sseInfiniteStream(
            eventGenerator: fn (int $i) => [
                'event' => 'price',
                'data'  => json_encode(['tick' => $i, 'value' => 100 + $i]),
                'id'    => (string) $i,
            ],
            maxEvents: 5
        )
        ->dataStreamTransferLatency(0.01)
        ->register();

    $ticks = [];
    (new PriceFeedService())->subscribe(
        url:      'https://api.example.com/prices',
        onPrice:  fn ($event) => $ticks[] = json_decode($event->data, true)
    );

    expect($ticks)->toHaveCount(5)
        ->and($ticks[0]['tick'])->toBe(0)
        ->and($ticks[4]['tick'])->toBe(4);

    Http::assertSSEConnectionMade('https://api.example.com/prices');
});

Pest — DI Mode

use Hibla\HttpClient\HttpClient;
use Hibla\HttpClient\Testing\TestingHttpHandler;

beforeEach(function () {
    $this->handler = new TestingHttpHandler();
    $this->client  = new HttpClient()->withHandler($this->handler);
    $this->service = new UserService($this->client);
});

afterEach(fn () => $this->handler->reset());

it('fetches a list of users', function () {
    $this->handler->mock('GET')
        ->url('https://api.example.com/users')
        ->respondJson(['users' => [['id' => 1, 'name' => 'Reymart Calicdan']]])
        ->register();

    $users = $this->service->list();

    expect($users)->toHaveCount(1);
    $this->handler->assertRequestMade('GET', 'https://api.example.com/users');
    $this->handler->assertHeaderSent('Accept', 'application/json');
});

it('sends cookies after login', function () {
    $this->handler->mock('POST')
        ->url('https://api.example.com/login')
        ->respondWithStatus(200)
        ->setCookie(name: 'session', value: 'tok-abc', secure: true, httpOnly: true)
        ->register();

    $this->handler->mock('GET')
        ->url('https://api.example.com/profile')
        ->expectCookies(['session' => 'tok-abc'])
        ->respondJson(['name' => 'Reymart Calicdan'])
        ->register();

    $this->service->login('[email protected]', 'password');
    $this->service->profile();

    $this->handler->assertCookieIsSecure('session');
    $this->handler->assertCookieIsHttpOnly('session');
    $this->handler->assertCookieSentToUrl('session', 'https://api.example.com/profile');
});

Pest — Passthrough Mode

use Hibla\HttpClient\Http;

beforeEach(fn () => Http::startTesting()->enablePassthrough());
afterEach(fn () => Http::stopTesting());

it('mocks the payment gateway but hits staging for order data', function () {
    Http::mock('POST')
        ->url('https://payments.example.com/charge')
        ->respondWithStatus(200)
        ->respondJson(['charged' => true, 'id' => 'ch_001'])
        ->register();

    $result = (new CheckoutService())->checkout(orderId: 'ord-123');

    expect($result->charged)->toBeTrue();

    Http::assertRequestMade('POST', 'https://payments.example.com/charge');
    Http::assertRequestJsonContains('POST', 'https://payments.example.com/charge', ['order_id' => 'ord-123']);

    // Real request to staging — still recorded and assertable
    Http::assertRequestMade('GET', 'https://api.staging.example.com/orders/ord-123');
    Http::assertBearerTokenSent('staging-token');
});

PHPUnit

use Hibla\HttpClient\Http;
use PHPUnit\Framework\TestCase;

class OrderServiceTest extends TestCase
{
    protected function setUp(): void    { Http::startTesting(); }
    protected function tearDown(): void { Http::stopTesting(); }

    public function test_places_order_and_sends_confirmation(): void
    {
        Http::mock('POST')
            ->url('https://api.example.com/orders')
            ->expectHeader('Authorization', 'Bearer secret')
            ->expectJson(['item' => 'book', 'qty' => 2])
            ->respondWithStatus(201)
            ->respondJson(['id' => 'ord-001', 'status' => 'confirmed'])
            ->register();

        Http::mock('POST')
            ->url('https://mailer.example.com/send')
            ->respondWithStatus(200)
            ->register();

        $service = new OrderService(token: 'secret');
        $service->placeOrder(item: 'book', qty: 2, email: '[email protected]');

        Http::assertRequestCount(2);
        Http::assertRequestMade('POST', 'https://api.example.com/orders');
        Http::assertRequestJsonContains('POST', 'https://api.example.com/orders', ['item' => 'book']);
        Http::assertBearerTokenSent('secret', requestIndex: 0);
        Http::assertRequestMade('POST', 'https://mailer.example.com/send');
    }
}

PHPUnit and Pest Integration

When PHPUnit is available, all assert* methods register themselves with PHPUnit's assertion counter automatically, so they appear in test output and contribute to the assertion count. No extra configuration is required.

When PHPUnit is not present (for example, in standalone PHP projects without PHPUnit), failed assertions throw MockAssertionError instead.

Development

git clone https://github.com/hiblaphp/http-client-testing.git
cd http-client-testing
composer install

./vendor/bin/pest

./vendor/bin/phpstan analyse

Credits

API Design: Inspired by Laravel Http::fake() api.

License

MIT License. See LICENSE for more information.

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README.md		README.md
composer.json		composer.json
phpstan.neon		phpstan.neon
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HTTP Client Testing

Table of Contents

Requirements

Installation

Getting Started

Option 1: Static Facade (Recommended for Most Projects)

Option 2: Direct Dependency Injection

Choosing Between the Two

Mocking Requests

Method Matching

URL Patterns

Response Bodies

Response Headers

Streaming Body Chunks

Persistent Mocks

Latency Simulation

Matching Request Expectations

Header Matching

JSON Body Matching

Body Pattern Matching

Cookie Matching

Custom Closure Matcher

Simulating Failures

Hard Failures

Timeouts

Network Errors

Retryable Failures

Retry Sequences

Fail Until Attempt N

Timeout Until Attempt N

HTTP Status Failures Until Success

Custom Failure Sequence

Mixed and Intermittent Failures

Rate Limiting with Exponential Backoff

Gradually Improving Network

File Operations

Mocking File Downloads

Mocking File Uploads

Cookie Mocking

Server-Sent Events (SSE)

Basic SSE Response

Adding Events Individually

SSE with Retry Interval

SSE with Retry Directive Only

SSE with Event IDs

SSE with Keepalive Heartbeats

SSE — Heartbeat Only

SSE with Multiple Event Types

SSE with Comment Lines

SSE — Expect Last-Event-ID (Resumption)

SSE Disconnection

Streaming SSE (Periodic Emitter)

Finite Event List

Limited Events with Generator

Infinite Stream

Periodic Events then Network Drop

SSE Retry Sequences

Fail Until Attempt N

Timeout Until Attempt N

Custom Failure Sequence

Drop After Receiving Events

Reconnect from a Specific Event ID

Rate Limited Until Success (429)

Network Errors Until Success

Gradually Improving Connection

Mixed Failure Types

Intermittent Failures

Network Simulation

Passthrough Mode

How It Works

Recorded Requests and Assertions on Real Requests

Mixing Mocks and Real Requests

Disabling Passthrough

Things to Be Aware Of

Assertions

`TestingHttpHandler` / `Http::` — Testing Lifecycle

`MockRequestBuilder` — Request Matching

`MockRequestBuilder` — Response Configuration

`MockRequestBuilder` — Latency and Failures

`MockRequestBuilder` — Retry Sequences

`MockRequestBuilder` — File Operations

`MockRequestBuilder` — Cookie Mocking

`MockRequestBuilder` — SSE

`MockRequestBuilder` — SSE Retry Sequences

Packages