test: increase backup_tasks.py coverage to 99.79%

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Add comprehensive tests covering all previously untested code paths in
app/tasks/backup_tasks.py, raising coverage from 66.39% to 99.79%.

New test classes:
- TestDumpPostgresqlBranches / TestDumpMysqlBranches: URL branches
- TestRestoreSqliteBranches: error paths and rollback scenarios
- TestRestorePostgresqlBranches / TestRestoreMysqlBranches: URL branches
- TestApplyRetentionOSError: OSError on file removal + remote record keeping
- TestPruneRemoteBackups: full pruning lifecycle
- TestDeleteRemoteCopy: S3, Dropbox, known/unknown destinations
- TestUploadRemote: all destination branches (S3, Dropbox, email, Nextcloud, WebDAV)
- TestEmailBackup: recipient error, TLS, no-auth paths
- TestCreateBackupAdditional: dump failure, remote upload, PG/MySQL failures
- TestCleanupOldBackupsTask: validates all tiers are processed

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

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copilot-swe-agent[bot]

2026-03-08 12:11:07 +00:00

parent 7e3b82d55e

commit 9a95d5cfd5

1 changed files with 1092 additions and 0 deletions

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