Support for isc_spb_bkp_zip (#1171).

src/FirebirdSql.Data.FirebirdClient.Tests/FbServicesTests.cs

@@ -60,6 +60,22 @@ public async Task BackupRestoreTest()
 		await Connection.CloseAsync();
 	}
 
+	[Test]
+	public async Task BackupRestoreZipTest()
+	{
+		if (!EnsureServerVersionAtLeast(new Version(4, 0, 0, 0)))
+			return;
+
+		var backupName = $"{Guid.NewGuid()}.bak";
+		var csb = BuildServicesConnectionStringBuilder(ServerType, Compression, WireCrypt, true);
+		var connectionString = csb.ToString();
+		await BackupPartHelper(backupName, connectionString, FbBackupFlags.Zip);
+		await RestorePartHelper(backupName, connectionString);
+		// test the database was actually restored fine
+		await Connection.OpenAsync();
+		await Connection.CloseAsync();
+	}
+
 	[Test]
 	public async Task BackupRestoreParallelTest()
 	{
@@ -453,11 +469,11 @@ public async Task NFixupTest()
 		Assert.DoesNotThrowAsync(() => Connection.OpenAsync());
 	}
 
-	static Task BackupPartHelper(string backupName, string connectionString)
+	static Task BackupPartHelper(string backupName, string connectionString, FbBackupFlags backupFlags = FbBackupFlags.IgnoreLimbo)
 	{
 		var backupSvc = new FbBackup();
 		backupSvc.ConnectionString = connectionString;
-		backupSvc.Options = FbBackupFlags.IgnoreLimbo;
+		backupSvc.Options = backupFlags;
 		backupSvc.BackupFiles.Add(new FbBackupFile(backupName, 2048));
 		backupSvc.Verbose = true;
 		backupSvc.Statistics = FbBackupRestoreStatistics.TotalTime | FbBackupRestoreStatistics.TimeDelta;

src/FirebirdSql.Data.FirebirdClient/Services/FbBackupFlags.cs

@@ -33,4 +33,5 @@ public enum FbBackupFlags
 	Convert = IscCodes.isc_spb_bkp_convert,
 	Expand = IscCodes.isc_spb_bkp_expand,
 	NoDatabaseTriggers = IscCodes.isc_spb_bkp_no_triggers,
+	Zip = IscCodes.isc_spb_bkp_zip,
 }