added more sleeps to ensure mtimes of input files are different in tests

pydra/engine/tests/test_specs.py

@@ -195,6 +195,7 @@ def test_input_file_hash_2(tmp_path):
     assert hash1 == hash2
 
     # checking if different content (the same name) affects the hash
+    time.sleep(2)  # ensure mtime is different
     file_diffcontent = tmp_path / "in_file_1.txt"
     with open(file_diffcontent, "w") as f:
         f.write("hi")
@@ -225,6 +226,7 @@ def test_input_file_hash_2a(tmp_path):
     assert hash1 == hash2
 
     # checking if different content (the same name) affects the hash
+    time.sleep(2)  # ensure mtime is different
     file_diffcontent = tmp_path / "in_file_1.txt"
     with open(file_diffcontent, "w") as f:
         f.write("hi")
@@ -266,6 +268,7 @@ def test_input_file_hash_3(tmp_path):
     # assert id(files_hash1["in_file"][filename]) == id(files_hash2["in_file"][filename])
 
     # recreating the file
+    time.sleep(2)  # ensure mtime is different
     with open(file, "w") as f:
         f.write("hello")
 
@@ -357,6 +360,7 @@ def test_input_file_hash_5(tmp_path):
     assert hash1 == hash2
 
     # checking if different content (the same name) affects the hash
+    time.sleep(2)  # ensure mtime is different
     file_diffcontent = tmp_path / "in_file_1.txt"
     with open(file_diffcontent, "w") as f:
         f.write("hi")