feat(imapx): connect, endpoint test, login test with folder listing

internal/imapx/dial_test.go

@@ -0,0 +1,42 @@
+package imapx
+
+import (
+	"context"
+	"os"
+	"strconv"
+	"testing"
+)
+
+func testEP(t *testing.T) Endpoint {
+	host := os.Getenv("TEST_IMAP_HOST")
+	if host == "" {
+		t.Skip("TEST_IMAP_HOST not set")
+	}
+	port, _ := strconv.Atoi(os.Getenv("TEST_IMAP_PORT"))
+	return Endpoint{Host: host, Port: port, TLSMode: "plain"}
+}
+
+func TestTestEndpointOK(t *testing.T) {
+	ep := testEP(t)
+	if err := TestEndpoint(context.Background(), ep); err != nil {
+		t.Fatalf("TestEndpoint: %v", err)
+	}
+}
+
+func TestTestLoginListsFolders(t *testing.T) {
+	ep := testEP(t)
+	// greenmail auto-creates users on first login
+	folders, err := TestLogin(context.Background(), ep, "user1@localhost", "pass1")
+	if err != nil {
+		t.Fatalf("TestLogin: %v", err)
+	}
+	found := false
+	for _, f := range folders {
+		if f == "INBOX" {
+			found = true
+		}
+	}
+	if !found {
+		t.Fatalf("INBOX not in folders: %v", folders)
+	}
+}