Error checking in the customizer

modules/postgres/postgres.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"net"
+	"os"
 	"path/filepath"
 	"strings"
 
@@ -200,7 +201,7 @@ func WithSSLSettings(sslSettings SSLSettings) testcontainers.CustomizeRequestOpt
 
 	const defaultPermission = 0o600
 
-	return func(req *testcontainers.GenericContainerRequest) {
+	return func(req *testcontainers.GenericContainerRequest) error {
 		req.Files = append(req.Files, testcontainers.ContainerFile{
 			HostFilePath:      sslSettings.CACertFile,
 			ContainerFilePath: postgresCaCertPath,
@@ -217,9 +218,18 @@ func WithSSLSettings(sslSettings SSLSettings) testcontainers.CustomizeRequestOpt
 			FileMode:          defaultPermission,
 		})
 
+		expectedFiles := []string{sslSettings.CACertFile, sslSettings.CertFile, sslSettings.KeyFile}
+		for _, expectedFile := range expectedFiles {
+			_, err := os.Stat(expectedFile)
+			if err != nil {
+				return err
+			}
+		}
+
 		req.WaitingFor = wait.ForAll(req.WaitingFor, wait.ForLog("database system is ready to accept connections"))
 
 		internalEntrypoint(req)
+		return nil
 	}
 }
 

modules/postgres/postgres_test.go

@@ -277,6 +277,26 @@ func TestWithSSL(t *testing.T) {
 	assert.NotNil(t, result)
 }
 
+func TestSSLValidatesKeyMaterialPath(t *testing.T) {
+
+	ctx := context.Background()
+
+	sslSettings := postgres.SSLSettings{}
+
+	_, err := postgres.RunContainer(ctx,
+		postgres.WithConfigFile(filepath.Join("testdata", "postgres-ssl.conf")),
+		postgres.WithInitScripts(filepath.Join("testdata", "init-user-db.sh")),
+		postgres.WithDatabase(dbname),
+		postgres.WithUsername(user),
+		postgres.WithPassword(password),
+		testcontainers.WithWaitStrategy(wait.ForLog("database system is ready to accept connections").WithOccurrence(2).WithStartupTimeout(5*time.Second)),
+		postgres.WithSSLSettings(sslSettings),
+	)
+	if err == nil {
+		t.Fatal(err)
+	}
+
+}
 func TestWithInitScript(t *testing.T) {
 	ctx := context.Background()