func TestShouldTrace(t *testing.T) {
testService := "com.hailocab.service.helloworld"
testEndpoint := "sayhello"
payload := &TestPayload{}
// Without a traceID and with a 0 pcChance, we shouldn't trace
buf := bytes.NewBufferString(`{"hailo":{"service":{"trace":{"pcChance":0.0}}}}`)
config.Load(buf)
req, _ := NewRequest(testService, testEndpoint, payload)
req.SetTraceID("")
assert.False(t, req.shouldTrace(), `shouldTrace() should return false with traceID="" and pcChance=0`)
// With a traceID present, we should always trace
req, _ = NewRequest(testService, testEndpoint, payload)
req.SetTraceID("test-trace-id")
assert.True(t, req.shouldTrace(), "shouldTrace() should return true with a traceID set")
// Without a traceID, and with a 1 pcChance (ie. always), we should trace
buf = bytes.NewBufferString(`{"hailo":{"service":{"trace":{"pcChance":1.0}}}}`)
config.Load(buf)
req, _ = NewRequest(testService, testEndpoint, payload)
req.SetTraceID("")
assert.True(t, req.shouldTrace(), `shouldTrace() should return true with traceId="" and pcChance=1`)
}
func (s *MemcacheHostsSuite) TestGetHostsServersInConfig() {
buf := bytes.NewBufferString(`{
"hailo": {
"service": {
"memcache":{
"servers": ["10.0.0.1:11211"]
}
}
}
}`)
config.Load(buf)
hosts := getHosts()
s.Len(hosts, 1)
s.Equal(hosts[0], "10.0.0.1:11211")
}
func (s *ZkHostsSuite) TestGetHostsServersInConfig() {
buf := bytes.NewBufferString(`{
"hailo": {
"service": {
"zookeeper":{
"hosts": ["10.0.0.1:2181"]
}
}
}
}`)
config.Load(buf)
hosts := getHosts()
s.Len(hosts, 1)
s.Equal(hosts[0], "10.0.0.1:2181")
}
func (s *NsqHostsSuite) TestGetHostsClusterInConfig() {
buf := bytes.NewBufferString(`{
"hailo": {
"service": {
"nsq":{
"cluster": "my-cluster"
}
}
}
}`)
config.Load(buf)
s.mockResolver.Register(
"nsq-my-cluster",
[]net.IP{net.ParseIP("10.0.0.1")},
nil,
)
hosts := getHosts(4150)
expectedHosts := []string{"10.0.0.1:4150"}
s.Equal(strings.Join(expectedHosts, " "), strings.Join(hosts, " "))
}
func (s *MemcacheHostsSuite) TestGetHostsTierInConfig() {
buf := bytes.NewBufferString(`{
"hailo": {
"service": {
"memcache":{
"tier": "my-tier"
}
}
}
}`)
config.Load(buf)
s.mockResolver.Register(
"memcached-my-tier",
[]net.IP{net.ParseIP("10.0.0.1")},
nil,
)
hosts := getHosts()
s.Len(hosts, 1)
s.Equal(hosts[0], "10.0.0.1:11211")
}
func (s *CircuitBreakerTestSuit) TestCircuitConfig() {
service := "com.hailocab.test.cruft"
endpoint := "testendpoint"
// Set default timeout to 100 ms
config.Load(bytes.NewBuffer([]byte(`{
"hailo": {
"platform": {
"circuitbreaker": {
"initialIntervalMs": 100
}
}
}
}`)))
// Let config propagate -- crufty :(
time.Sleep(50 * time.Millisecond)
// Circuit is initially closed
s.False(Open(service, endpoint))
// Trip circuit and check
for i := 0; i < 100; i++ {
Result(service, endpoint, errors.Timeout("code", "description"))
}
s.True(Open(service, endpoint))
// Wait for circuit to half-open
s.clock.Add(51 * time.Millisecond)
s.True(Open(service, endpoint), "Circuit should be open after 51ms")
s.clock.Add(50 * time.Millisecond)
s.False(Open(service, endpoint), "Circuit should be closed after 101ms")
// Set new interval
s.NoError(config.Load(bytes.NewBuffer([]byte(`{
"hailo": {
"platform": {
"circuitbreaker": {
"initialIntervalMs": 50,
"endpoints": {
"com.hailocab.test.cruft": {
"testendpoint": {
"initialIntervalMs": 90
}
}
}
}
}
}
}`))))
// Let config propagate -- crufty :(
time.Sleep(50 * time.Millisecond)
// Check circuit is closed again
s.False(Open(service, endpoint))
// Trip circuit and check
for i := 0; i < 100; i++ {
Result(service, endpoint, errors.Timeout("code", "description"))
}
s.True(Open(service, endpoint))
// Wait for circuit to half-open
s.clock.Add(51 * time.Millisecond)
s.True(Open(service, endpoint), "Circuit should be open after 51ms")
s.clock.Add(40 * time.Millisecond)
s.False(Open(service, endpoint), "Circuit should be closed after 91ms")
}
func (s *NsqHostsSuite) TearDownTest() {
s.Suite.TearDownTest()
dns.DefaultResolver = s.realResolver
config.Load(bytes.NewBufferString("{}"))
}
func loadConfig() {
buf := bytes.NewBufferString(`{"hailo": {"service": {"cassandra": {"hosts": ["localhost:19160"]}}}}`)
config.Load(buf)
}