Autotests: Allow import and export of sequences with three letter amino acid codes

[AlexeyGirin]

Source task(s):

• Allow import and export of sequences with three letter amino acid codes #5556

• 1. Verify import with valid three-letter codes in the sequence(e.g., "AlaGlyCys")

• 2. Verify that spaces separate different amino acid sequences in import(e.g. AlaAla CysCys)

• 3. Verify ignoring of line breaks during import(e.g., "AlaGly\nCys")

• 4. Verify error message for unsupported symbols in import

• 5. Verify error for incorrect formatting in import (uppercase/lowercase mix)

• 6. Verify error when a three-letter sequence cannot be matched to amino acids(e.g. "Alx")

• 7. Verify export option includes both single-letter and three-letter sequence codes(Requirement 2.1)

• 8. Verify export functionality for sequences using three-letter codes only(Requirement 2.2)

• 9. Verify export with non-standard ambiguous amino acids(error should appear Requirement 2.3)

• 10. Verify that non pure peptide sequences are prevented from exporting(Requirement 2.4)

• 11. Verify natural analogue conversion on export(Requirement 2.5)

• 12. Verify specific export format for "Any amino acid" (X) as "Xun"

• 13. Verify export format for ambiguous amino acids (B, J, Z)

• 14. Verify that multiple sequences are separated by space in exported file