caddytest: Revise sleep durations

Attempt to reduce flakiness a bit more

Test suite needs to be rewritten.

caddytest/caddytest.go

@@ -214,7 +214,7 @@ func (tc *Tester) ensureConfigRunning(rawConfig string, configType string) error
 		return actual
 	}
 
-	for retries := 4; retries > 0; retries-- {
+	for retries := 10; retries > 0; retries-- {
 		if reflect.DeepEqual(expected, fetchConfig(client)) {
 			return nil
 		}
@@ -243,7 +243,7 @@ func validateTestPrerequisites() error {
 		}()
 
 		// wait for caddy to start serving the initial config
-		for retries := 4; retries > 0 && isCaddyAdminRunning() != nil; retries-- {
+		for retries := 10; retries > 0 && isCaddyAdminRunning() != nil; retries-- {
 			time.Sleep(10 * time.Millisecond)
 		}
 	}

caddytest/integration/reverseproxy_test.go

@@ -8,6 +8,7 @@ import (
 	"runtime"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/caddyserver/caddy/v2/caddytest"
 )
@@ -441,6 +442,7 @@ func TestReverseProxyHealthCheck(t *testing.T) {
 	}
   `, "caddyfile")
 
+	time.Sleep(100 * time.Millisecond) // TODO: for some reason this test seems particularly flaky, getting 503 when it should be 200, unless we wait
 	tester.AssertGetResponse("http://localhost:9080/", 200, "Hello, World!")
 }
 

modules/caddyhttp/reverseproxy/fastcgi/client_test.go

@@ -171,7 +171,7 @@ func sendFcgi(reqType int, fcgiParams map[string]string, data []byte, posts map[
 
 	log.Println("c: send data length ≈", length, string(content))
 	conn.Close()
-	time.Sleep(1 * time.Second)
+	time.Sleep(250 * time.Millisecond)
 
 	if bytes.Contains(content, []byte("FAILED")) {
 		globalt.Error("Server return failed message")
@@ -230,7 +230,7 @@ func DisabledTest(t *testing.T) {
 		}
 	}()
 
-	time.Sleep(1 * time.Second)
+	time.Sleep(250 * time.Millisecond)
 
 	// init
 	fcgiParams := make(map[string]string)