TST: fix test to work correctly outside git work directory

Fixes #695.

Author: dnicolodi

tests/test_sdist.py

@@ -218,12 +218,13 @@ def test_long_path(sdist_long_path):
 
 
 def test_reproducible(package_pure, tmp_path):
-    t1 = time.time()
-    sdist_path_a = mesonpy.build_sdist(tmp_path / 'a')
-    t2 = time.time()
-    # Ensure that the two sdists are build at least one second apart.
-    time.sleep(max(t1 + 1.0 - t2, 0.0))
-    sdist_path_b = mesonpy.build_sdist(tmp_path / 'b')
+    with in_git_repo_context():
+        t1 = time.time()
+        sdist_path_a = mesonpy.build_sdist(tmp_path / 'a')
+        t2 = time.time()
+        # Ensure that the two sdists are build at least one second apart.
+        time.sleep(max(t1 + 1.0 - t2, 0.0))
+        sdist_path_b = mesonpy.build_sdist(tmp_path / 'b')
 
     assert sdist_path_a == sdist_path_b
     assert tmp_path.joinpath('a', sdist_path_a).read_bytes() == tmp_path.joinpath('b', sdist_path_b).read_bytes()