Add test to cover bz.avail_out == 0

src/tests/cli_tests.py

@@ -4730,6 +4730,32 @@ def test_rnp_compression(self):
  file_encryption_rnp_to_gpg(size, z)
  rnp_signing_gpg_to_rnp(size, z)
 
+ def test_rnp_compression_corner_cases(self):
+ shutil.rmtree(RNPDIR)
+ kring = shutil.copytree(data_path(KEYRING_DIR_1), RNPDIR)
+ gpg_import_pubring()
+ gpg_import_secring()
+
+ algosrnp = [None, 'zip', 'zlib', 'bzip2']
+
+ for algo in algosrnp:
+ z = [algo, None]
+ src = data_path('test_compression/cleartext-z-bz.txt')
+ dst, enc = reg_workfiles('cleartext', '.gpg', '.rnp')
+ for armor in [False, True]:
+ # Encrypt cleartext file with RNP
+ rnp_encrypt_file_ex(src, enc, [], None, None, None, z, armor)
+
+ # Decrypt encrypted file with GPG
+ gpg_decrypt_file(enc, dst, PASSWORD)
+ compare_files(src, dst, GPG_DATA_DIFFERS)
+ remove_files(dst)
+ # Decrypt encrypted file with RNP
+ rnp_decrypt_file(enc, dst)
+ compare_files(src, dst, RNP_DATA_DIFFERS)
+ remove_files(enc, dst)
+ clear_workfiles()
+
 class SignDefault(unittest.TestCase):
  '''
  Things to try later: