test: generate tls cert/key in test

pkg/config/tls.go

@@ -64,7 +64,7 @@ func GetTLSConfig(cfg tlsConfiger) (tlsConfig *tls.Config, err error) {
 	tlsConfig, err = loadTLSConfig(certPath, keyPath)
 	if err != nil {
 		log.WithError(err).Warn("Cannot load cert, generating a new one")
-		tlsConfig, err = generateTLSConfig(certPath, keyPath)
+		tlsConfig, err = GenerateTLSConfig(certPath, keyPath)
 		if err != nil {
 			return
 		}
@@ -126,8 +126,9 @@ func loadTLSConfig(certPath, keyPath string) (tlsConfig *tls.Config, err error)
 	return
 }
 
+// GenerateTLSConfig generates certs and keys at the given filepaths and returns a TLS Config which holds them.
 // See https://golang.org/src/crypto/tls/generate_cert.go
-func generateTLSConfig(certPath, keyPath string) (tlsConfig *tls.Config, err error) {
+func GenerateTLSConfig(certPath, keyPath string) (tlsConfig *tls.Config, err error) {
 	priv, err := rsa.GenerateKey(rand.Reader, 2048)
 	if err != nil {
 		err = fmt.Errorf("failed to generate private key: %s", err)

pkg/config/tls_test.go

@@ -43,7 +43,7 @@ func TestTLSKeyRenewal(t *testing.T) {
 	// Put old key there.
 	tlsTemplate.NotBefore = time.Now().Add(-365 * 24 * time.Hour)
 	tlsTemplate.NotAfter = time.Now()
-	cert, err := generateTLSConfig(certPath, keyPath)
+	cert, err := GenerateTLSConfig(certPath, keyPath)
 	require.Equal(t, err, ErrTLSCertExpireSoon)
 	require.Equal(t, len(cert.Certificates), 1)
 	time.Sleep(time.Second)

test/context/config.go

@@ -23,8 +23,10 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/ProtonMail/proton-bridge/pkg/config"
 	"github.com/ProtonMail/proton-bridge/pkg/constants"
 	"github.com/ProtonMail/proton-bridge/pkg/pmapi"
+	"github.com/sirupsen/logrus"
 )
 
 type fakeConfig struct {
@@ -39,9 +41,16 @@ func newFakeConfig() *fakeConfig {
 		panic(err)
 	}
 
-	return &fakeConfig{
+	cfg := &fakeConfig{
 		dir: dir,
 	}
+
+	// We must generate cert.pem and key.pem to prevent errors when attempting to open them.
+	if _, err = config.GenerateTLSConfig(cfg.GetTLSCertPath(), cfg.GetTLSKeyPath()); err != nil {
+		logrus.WithError(err).Fatal()
+	}
+
+	return cfg
 }
 
 func (c *fakeConfig) ClearData() error {