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// =========================================================================
// Stats tracking tests
// =========================================================================
#[test]
fn test_gateway_initial_stats() {
let gateway = GatewayBuilder::new().build();
let stats = gateway.stats();
assert_eq!(stats.total_requests, 0);
assert_eq!(stats.successful_requests, 0);
assert_eq!(stats.failed_requests, 0);
assert_eq!(stats.total_tokens, 0);
assert_eq!(stats.active_streams, 0);
assert_eq!(stats.avg_latency, Duration::ZERO);
}
#[tokio::test]
async fn test_gateway_stats_after_failures() {
let gateway = GatewayBuilder::new()
.config(GatewayConfig {
max_retries: 0, // No retries
..Default::default()
})
.build();
// No nodes registered, so inference will fail
let request = InferenceRequest {
capability: Capability::Generate,
input: b"test".to_vec(),
qos: QoSRequirements::default(),
request_id: "fail-test".to_string(),
tenant_id: None,
};
let _ = gateway.infer(request).await;
let stats = gateway.stats();
assert_eq!(stats.total_requests, 1);
assert_eq!(stats.failed_requests, 1);
assert_eq!(stats.successful_requests, 0);
}
// =========================================================================
// Stream cancel test
// =========================================================================
#[tokio::test]
async fn test_stream_cancel() {
let (gateway, catalog, health) = setup_test_gateway();
catalog
.register(
ModelId("stream-model".to_string()),
NodeId("n1".to_string()),
RegionId("us-west".to_string()),
vec![Capability::Generate],
)
.await
.expect("registration failed");
health.register_node(NodeId("n1".to_string()));
health.report_success(&NodeId("n1".to_string()), Duration::from_millis(10));
let request = InferenceRequest {
capability: Capability::Generate,
input: b"stream".to_vec(),
qos: QoSRequirements::default(),
request_id: "cancel-test".to_string(),
tenant_id: None,
};
let mut stream = gateway.infer_stream(request).await.expect("stream failed");
// Read a few tokens
let _ = stream.next_token().await;
let _ = stream.next_token().await;
// Cancel the stream
stream.cancel().await;
// After cancel, next_token should return None
let result = stream.next_token().await;
assert!(result.is_none());
}
/// Comprehensive integration test demonstrating full federation flow
#[tokio::test]
async fn test_full_federation_flow() {
use super::super::policy::CompositePolicy;
// =====================================================================
// Setup: Create multi-region deployment
// =====================================================================
let catalog = Arc::new(ModelCatalog::new());
let health = Arc::new(HealthChecker::default());
let circuit_breaker = Arc::new(CircuitBreaker::default());
// Register Whisper model in US-West (primary, fast)
catalog
.register(
ModelId("whisper-v3".to_string()),
NodeId("us-west-gpu".to_string()),
RegionId("us-west".to_string()),
vec![Capability::Transcribe],
)
.await
.expect("failed to register us-west");
// Register Whisper model in EU-West (GDPR compliant)
catalog
.register(
ModelId("whisper-v3".to_string()),
NodeId("eu-west-gpu".to_string()),
RegionId("eu-west".to_string()),
vec![Capability::Transcribe],
)
.await
.expect("failed to register eu-west");
// Register LLaMA in US-East
catalog
.register(
ModelId("llama-70b".to_string()),
NodeId("us-east-gpu".to_string()),
RegionId("us-east".to_string()),
vec![Capability::Generate, Capability::Code],
)
.await
.expect("failed to register llama");
// Register embedding model in multiple regions
for (node, region) in [("embed-us", "us-west"), ("embed-eu", "eu-west")] {
catalog
.register(
ModelId("bge-large".to_string()),
NodeId(node.to_string()),
RegionId(region.to_string()),
vec![Capability::Embed],
)
.await
.expect("failed to register embedding");
}
// =====================================================================
// Setup health states
// =====================================================================
// US-West: Healthy, fast (45ms)
health.register_node(NodeId("us-west-gpu".to_string()));
for _ in 0..3 {
health.report_success(
&NodeId("us-west-gpu".to_string()),
Duration::from_millis(45),
);
}
// EU-West: Healthy, slower (120ms)
health.register_node(NodeId("eu-west-gpu".to_string()));
for _ in 0..3 {
health.report_success(
&NodeId("eu-west-gpu".to_string()),
Duration::from_millis(120),
);
}
// US-East: Will be unknown/degraded (only 1 success)
health.register_node(NodeId("us-east-gpu".to_string()));
// Just one success keeps it in Unknown state (needs 2 for Healthy)
health.report_success(
&NodeId("us-east-gpu".to_string()),
Duration::from_millis(100),
);
// Embedding nodes: Healthy
for node in ["embed-us", "embed-eu"] {
health.register_node(NodeId(node.to_string()));
for _ in 0..3 {
health.report_success(&NodeId(node.to_string()), Duration::from_millis(15));
}
}
// =====================================================================
// Create Router with enterprise policies
// =====================================================================
let router = Arc::new(
Router::new(
super::super::routing::RouterConfig {
max_candidates: 10,
min_score: 0.1,
strategy: LoadBalanceStrategy::LeastLatency,
},
Arc::clone(&catalog),
Arc::clone(&health),
Arc::clone(&circuit_breaker),
)
.with_policy(CompositePolicy::enterprise_default()),
);
// =====================================================================
// Create Gateway
// =====================================================================
let gateway = FederationGateway::new(
GatewayConfig {
max_retries: 3,
inference_timeout: Duration::from_secs(30),
enable_tracing: true,
},
Arc::clone(&router),
Arc::clone(&health),
Arc::clone(&circuit_breaker),
);
// =====================================================================
// Test 1: Transcribe routes to fastest healthy node (us-west)
// =====================================================================
let request = InferenceRequest {
capability: Capability::Transcribe,
input: b"audio data".to_vec(),
qos: QoSRequirements::default(),
request_id: "test-transcribe".to_string(),
tenant_id: Some("acme".to_string()),
};
let candidates = router
.get_candidates(&request)
.await
.expect("get_candidates failed");
assert_eq!(candidates.len(), 2, "Should have 2 Transcribe candidates");
let target = router.route(&request).await.expect("route failed");
// US-West should be selected (lower latency = higher score)
assert_eq!(target.node_id, NodeId("us-west-gpu".to_string()));
// =====================================================================
// Test 2: Generate routes to only available node
// =====================================================================
let request = InferenceRequest {
capability: Capability::Generate,
input: b"prompt".to_vec(),
qos: QoSRequirements::default(),
request_id: "test-generate".to_string(),
tenant_id: None,
};
let target = router.route(&request).await.expect("route failed");
assert_eq!(target.node_id, NodeId("us-east-gpu".to_string()));
// =====================================================================
// Test 3: Embed has multiple candidates
// =====================================================================
let request = InferenceRequest {
capability: Capability::Embed,
input: b"text".to_vec(),
qos: QoSRequirements::default(),
request_id: "test-embed".to_string(),
tenant_id: None,
};
let candidates = router
.get_candidates(&request)
.await
.expect("get_candidates failed");
assert_eq!(candidates.len(), 2, "Should have 2 Embed candidates");
// =====================================================================
// Test 4: Gateway inference with stats
// =====================================================================
let request = InferenceRequest {
capability: Capability::Transcribe,
input: b"audio".to_vec(),
qos: QoSRequirements::default(),
request_id: "test-infer".to_string(),
tenant_id: None,
};
let response = gateway.infer(request).await.expect("inference failed");
assert_eq!(response.served_by, NodeId("us-west-gpu".to_string()));
assert!(!response.output.is_empty());
let stats = gateway.stats();
assert_eq!(stats.total_requests, 1);
assert_eq!(stats.successful_requests, 1);
assert_eq!(stats.failed_requests, 0);
// =====================================================================
// Test 5: Streaming inference
// =====================================================================
let request = InferenceRequest {
capability: Capability::Generate,
input: b"stream prompt".to_vec(),
qos: QoSRequirements::default(),
request_id: "test-stream".to_string(),
tenant_id: None,
};
let mut stream = gateway.infer_stream(request).await.expect("stream failed");
let mut tokens = 0;
while let Some(result) = stream.next_token().await {
result.expect("token error");
tokens += 1;
}
assert_eq!(tokens, 10, "Should receive 10 tokens");
// =====================================================================
// Test 6: Circuit breaker
// =====================================================================
let bad_node = NodeId("failing-node".to_string());
// Initially closed
assert_eq!(circuit_breaker.state(&bad_node), CircuitState::Closed);
// Simulate failures
for _ in 0..5 {
circuit_breaker.record_failure(&bad_node);
}
assert_eq!(circuit_breaker.state(&bad_node), CircuitState::Open);
assert!(circuit_breaker.is_open(&bad_node));
// =====================================================================
// Verify catalog state
// =====================================================================
let all_models = catalog.list_all().await.expect("list failed");
assert_eq!(all_models.len(), 3); // whisper-v3, llama-70b, bge-large
// =====================================================================
// Verify health states are tracked (all nodes have cached health)
// =====================================================================
let nodes_with_health = [
"us-west-gpu",
"eu-west-gpu",
"us-east-gpu",
"embed-us",
"embed-eu",
];
for node in nodes_with_health {
let h = health.get_cached_health(&NodeId(node.to_string()));
assert!(h.is_some(), "Health should be tracked for {}", node);
}
// Verify us-west has good health (3 successes)
let us_west_health = health
.get_cached_health(&NodeId("us-west-gpu".to_string()))
.expect("to_string");
assert_eq!(
us_west_health.status,
HealthState::Healthy,
"US-West should be healthy"
);
// =====================================================================
// Final summary - print results for visibility
// =====================================================================
println!("\n✅ Full Federation Flow Test PASSED!");
println!(" - 3 models registered across 5 nodes");
println!(" - 6 health entries tracked");
println!(" - Routing correctly prefers fastest healthy nodes");
println!(" - Gateway inference succeeds with stats tracking");
println!(" - Streaming returns expected token count");
println!(" - Circuit breaker opens after failures");
}