func TestHTTPHandlerPartialFail(t *testing.T) {
testCase := "pass"
health.RegisterFunc(testCase, published[testCase])
testCase = "fail"
health.RegisterFunc(testCase, published[testCase])
handler := health.Handler()
req, err := http.NewRequest("GET", "http://ignored.path.to.dontcare.example.com/", nil)
assert.Nil(t, err)
w := httptest.NewRecorder()
handler(w, req)
assert.Equal(t, health.HTTPStatusCodeHealthChecksFail, w.Code)
teardown()
}
func TestHTTPHandlerReturnsAll(t *testing.T) {
for name, fn := range published {
health.RegisterFunc(name, fn)
}
handler := health.Handler()
req, err := http.NewRequest("GET", "http://ignored.path.to.dontcare.example.com/", nil)
assert.Nil(t, err)
w := httptest.NewRecorder()
handler(w, req)
assert.Equal(t, health.HTTPStatusCodeHealthChecksFail, w.Code)
var actual map[string]health.Status
assert.Nil(t, json.Unmarshal(w.Body.Bytes(), &actual))
var expected = map[string]health.Status{
"pass": health.Healthy,
"fail": health.StatusUnhealthy(FAILING, nil),
"panic": health.StatusUnhealthy(health.CheckPanicked, errors.New("oops!")),
}
assert.Len(t, actual, len(expected))
assert.EqualValues(t, actual, expected)
teardown()
}
func TestRegisterFunc(t *testing.T) {
health.RegisterFunc(COMPONENT, alwaysFailing)
assert.Len(t, health.Components(), 1)
assert.Contains(t, health.Components(), COMPONENT)
all := health.RunChecks()
status, found := all[COMPONENT]
assert.True(t, found)
assert.EqualValues(t, status, alwaysFailing())
teardown()
}
func TestRegisterDuplicateHealthCheck(t *testing.T) {
health.Register(COMPONENT, healthy)
health.RegisterFunc(COMPONENT, alwaysFailing) // replace with failing health check
assert.Len(t, health.Components(), 1)
assert.Contains(t, health.Components(), COMPONENT)
all := health.RunChecks()
status, found := all[COMPONENT]
assert.True(t, found)
assert.EqualValues(t, status, alwaysFailing())
teardown()
}
//-----------------------------------------------------------------------------
// recover from health check panic and mark component as failing
func TestRecoverFromHealthCheckPanic(t *testing.T) {
cause := "oops I did it again"
health.RegisterFunc("Will panic", func() health.Status {
panic(cause)
})
checks := health.RunChecks()
assert.Len(t, checks, 1)
for _, hc := range checks {
assert.False(t, hc.Healthy)
assert.Equal(t, health.CheckPanicked, hc.Properties["message"])
assert.Equal(t, cause, hc.Properties["cause"])
}
teardown()
}
func TestParallelExecution(t *testing.T) {
start := time.Now()
expected_end := start.Add(time.Second)
for i := 0; i < 5; i++ {
health.RegisterFunc(fmt.Sprint("Sleeper-", i), func() health.Status {
time.Sleep(1 * time.Second)
return health.Healthy
})
}
_ = health.RunChecks()
// we don't really expect it to diverge by more than ~100ms, to avoid false negatives, allow one
// second drift - still considerably less than the 5s if running checks sequenctially
assert.WithinDuration(t, expected_end, time.Now(), time.Second, "not running concurrently")
teardown()
}