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+"""Tests for distutils._modified."""
+
+import os
+import types
+from distutils._modified import newer, newer_group, newer_pairwise, newer_pairwise_group
+from distutils.errors import DistutilsFileError
+from distutils.tests import support
+
+import pytest
+
+
+class TestDepUtil(support.TempdirManager):
+ def test_newer(self):
+ tmpdir = self.mkdtemp()
+ new_file = os.path.join(tmpdir, 'new')
+ old_file = os.path.abspath(__file__)
+
+ # Raise DistutilsFileError if 'new_file' does not exist.
+ with pytest.raises(DistutilsFileError):
+ newer(new_file, old_file)
+
+ # Return true if 'new_file' exists and is more recently modified than
+ # 'old_file', or if 'new_file' exists and 'old_file' doesn't.
+ self.write_file(new_file)
+ assert newer(new_file, 'I_dont_exist')
+ assert newer(new_file, old_file)
+
+ # Return false if both exist and 'old_file' is the same age or younger
+ # than 'new_file'.
+ assert not newer(old_file, new_file)
+
+ def _setup_1234(self):
+ tmpdir = self.mkdtemp()
+ sources = os.path.join(tmpdir, 'sources')
+ targets = os.path.join(tmpdir, 'targets')
+ os.mkdir(sources)
+ os.mkdir(targets)
+ one = os.path.join(sources, 'one')
+ two = os.path.join(sources, 'two')
+ three = os.path.abspath(__file__) # I am the old file
+ four = os.path.join(targets, 'four')
+ self.write_file(one)
+ self.write_file(two)
+ self.write_file(four)
+ return one, two, three, four
+
+ def test_newer_pairwise(self):
+ one, two, three, four = self._setup_1234()
+
+ assert newer_pairwise([one, two], [three, four]) == ([one], [three])
+
+ def test_newer_pairwise_mismatch(self):
+ one, two, three, four = self._setup_1234()
+
+ with pytest.raises(ValueError):
+ newer_pairwise([one], [three, four])
+
+ with pytest.raises(ValueError):
+ newer_pairwise([one, two], [three])
+
+ def test_newer_pairwise_empty(self):
+ assert newer_pairwise([], []) == ([], [])
+
+ def test_newer_pairwise_fresh(self):
+ one, two, three, four = self._setup_1234()
+
+ assert newer_pairwise([one, three], [two, four]) == ([], [])
+
+ def test_newer_group(self):
+ tmpdir = self.mkdtemp()
+ sources = os.path.join(tmpdir, 'sources')
+ os.mkdir(sources)
+ one = os.path.join(sources, 'one')
+ two = os.path.join(sources, 'two')
+ three = os.path.join(sources, 'three')
+ old_file = os.path.abspath(__file__)
+
+ # return true if 'old_file' is out-of-date with respect to any file
+ # listed in 'sources'.
+ self.write_file(one)
+ self.write_file(two)
+ self.write_file(three)
+ assert newer_group([one, two, three], old_file)
+ assert not newer_group([one, two, old_file], three)
+
+ # missing handling
+ os.remove(one)
+ with pytest.raises(OSError):
+ newer_group([one, two, old_file], three)
+
+ assert not newer_group([one, two, old_file], three, missing='ignore')
+
+ assert newer_group([one, two, old_file], three, missing='newer')
+
+
+@pytest.fixture
+def groups_target(tmp_path):
+ """
+ Set up some older sources, a target, and newer sources.
+
+ Returns a simple namespace with these values.
+ """
+ filenames = ['older.c', 'older.h', 'target.o', 'newer.c', 'newer.h']
+ paths = [tmp_path / name for name in filenames]
+
+ for mtime, path in enumerate(paths):
+ path.write_text('', encoding='utf-8')
+
+ # make sure modification times are sequential
+ os.utime(path, (mtime, mtime))
+
+ return types.SimpleNamespace(older=paths[:2], target=paths[2], newer=paths[3:])
+
+
+def test_newer_pairwise_group(groups_target):
+ older = newer_pairwise_group([groups_target.older], [groups_target.target])
+ newer = newer_pairwise_group([groups_target.newer], [groups_target.target])
+ assert older == ([], [])
+ assert newer == ([groups_target.newer], [groups_target.target])
+
+
+def test_newer_group_no_sources_no_target(tmp_path):
+ """
+ Consider no sources and no target "newer".
+ """
+ assert newer_group([], str(tmp_path / 'does-not-exist'))