Make the testsuite pass with file v5.40

Closes: #250
Signed-off-by: Mattia Rizzolo <mattia@debian.org>

tests/comparators/test_binary.py

@@ -33,7 +33,11 @@ from diffoscope.comparators.missing_file import MissingFile
 from diffoscope.comparators.utils.compare import Xxd
 
 from ..utils.data import data, init_fixture, get_data, normalize_zeros
-from ..utils.tools import skip_unless_tools_exist, skip_unless_module_exists
+from ..utils.tools import (
+    skip_unless_tools_exist,
+    skip_unless_module_exists,
+    file_version_is_lt,
+)
 
 
 TEST_FILE1_PATH = data("binary1")
@@ -56,7 +60,10 @@ def test_not_same_content(binary1, binary2):
 
 
 def test_guess_file_type():
-    assert File.guess_file_type(TEST_FILE1_PATH) == "data"
+    if file_version_is_lt("5.40"):
+        assert File.guess_file_type(TEST_FILE1_PATH) == "data"
+    else:
+        assert File.guess_file_type(TEST_FILE1_PATH) == "OpenPGP Public Key"
 
 
 def test_guess_encoding_binary():

tests/data/archive12.diff.txt

@@ -11,5 +11,5 @@
 │ │ +gzip compressed data, was "compressed", last modified: Sun Mar 19 22:27:42 2017, max compression, from Unix, truncated
 │ ├── compressed
 │ │ @@ -1 +1 @@
-│ │ -a
-│ │ +b
+│ │ -00000000: 610a                                     a.
+│ │ +00000000: 620a                                     b.

tests/test_presenters.py

@@ -85,7 +85,7 @@ def test_text_option_is_default(capsys):
     assert out == get_data("output.txt")
 
 
-@skip_unless_file_version_is_at_least("5.39")
+@skip_unless_file_version_is_at_least("5.40")
 def test_text_proper_indentation(capsys):
     out = run(capsys, pair=("archive1.tar", "archive2.tar"))
 

tests/test_quines.py

@@ -23,7 +23,10 @@ from diffoscope.comparators.zip import ZipFile
 from diffoscope.comparators.gzip import GzipFile
 
 from .utils.data import load_fixture, get_data
-from .utils.tools import skip_unless_file_version_is_at_least
+from .utils.tools import (
+    skip_unless_file_version_is_at_least,
+    file_version_is_ge,
+)
 
 quine1 = load_fixture("quine.gz")
 quine2 = load_fixture("quine.zip")
@@ -54,6 +57,9 @@ def differences(quine1, quine2):
 @skip_unless_file_version_is_at_least("5.37")
 def test_difference(differences):
     expected_diff = get_data("quine_expected_diff")
+    if file_version_is_ge("5.40"):
+        expected_diff = expected_diff[:-1]
+        expected_diff += ", compression method=deflate\n"
     assert differences[0].unified_diff == expected_diff
 
 

tests/utils/tools.py

@@ -39,6 +39,14 @@ def file_version():
     )
 
 
+def file_version_is_lt(version):
+    return file_version() < version
+
+
+def file_version_is_ge(version):
+    return file_version() >= version
+
+
 def tools_missing(*required):
     return not required or any(find_executable(x) is None for x in required)