Increasing code coverage by adding extra unit tests

[ShahriyarR]

As you add tests, further you are doing code changes as well, to make it more testable.

[sourcery-ai]

Sourcery Code Quality Report

✅  Merging this PR will increase code quality in the affected files by 1.45%.

Quality metrics	Before	After	Change
Complexity	4.80 ⭐	4.47 ⭐	-0.33 👍
Method Length	61.74 🙂	57.72 ⭐	-4.02 👍
Working memory	9.81 🙂	9.44 🙂	-0.37 👍
Quality	67.19% 🙂	68.64% 🙂	1.45% 👍

Other metrics	Before	After	Change
Lines	753	804	51

Changed files	Quality Before	Quality After	Quality Change
mysql_autoxtrabackup/backup_backup/backup_builder.py	59.35% 🙂	59.35% 🙂	0.00%
mysql_autoxtrabackup/backup_backup/backuper.py	63.03% 🙂	62.43% 🙂	-0.60% 👎
mysql_autoxtrabackup/utils/helpers.py	81.95% ⭐	81.06% ⭐	-0.89% 👎
tests/conftest.py	100.00% ⭐	98.67% ⭐	-1.33% 👎
tests/test_backup.py	89.99% ⭐	85.19% ⭐	-4.80% 👎

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
mysql_autoxtrabackup/backup_backup/backuper.py	Backup.all_backup	16 🙂	165 😞	12 😞	42.90% 😞	Try splitting into smaller methods. Extract out complex expressions
mysql_autoxtrabackup/backup_backup/backup_builder.py	BackupBuilderChecker.extract_decrypt_from_stream_backup	9 🙂	155 😞	16 ⛔	44.62% 😞	Try splitting into smaller methods. Extract out complex expressions
mysql_autoxtrabackup/backup_backup/backup_builder.py	BackupBuilderChecker.general_command_builder	12 🙂	199 😞	8 🙂	51.24% 🙂	Try splitting into smaller methods
mysql_autoxtrabackup/backup_backup/backup_builder.py	BackupBuilderChecker.decrypter	6 ⭐	140 😞	12 😞	54.44% 🙂	Try splitting into smaller methods. Extract out complex expressions
mysql_autoxtrabackup/backup_backup/backuper.py	Backup.show_tags	3 ⭐	99 🙂	19 ⛔	54.53% 🙂	Extract out complex expressions

Legend and Explanation

The emojis denote the absolute quality of the code:

• ⭐ excellent
• 🙂 good
• 😞 poor
• ⛔ very poor

The 👍 and 👎 indicate whether the quality has improved or gotten worse with this pull request.

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Please see our documentation here for details on how these metrics are calculated.

We are actively working on this report - lots more documentation and extra metrics to come!

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