Add FileHandler tests.

tests/test_file_utils.py

@@ -1,4 +1,5 @@
 import os
+import pytest
 
 from wxflow import FileHandler
 
@@ -27,6 +28,12 @@ def test_mkdir(tmp_path):
         assert os.path.exists(dd)
 
 
+def test_bad_mkdir():
+    # Attempt to create a directory in an unwritable parent directory
+    with pytest.raises(OSError):
+        FileHandler({'mkdir': ["/dev/null/foo"]}).sync()
+
+
 def test_copy(tmp_path):
     """
     Test for copying files:
@@ -35,6 +42,7 @@ def test_copy(tmp_path):
     tmp_path - pytest fixture
     """
 
+    # Test 1 (nominal operation) - Creating a directory and copying files to it
     input_dir_path = tmp_path / 'my_input_dir'
 
     # Create the input directory
@@ -56,7 +64,7 @@ def test_copy(tmp_path):
     for src, dest in zip(src_files, dest_files):
         copy_list.append([src, dest])
 
-    # Create config object for FileHandler
+    # Create config dictionary for FileHandler
     config = {'copy': copy_list}
 
     # Copy input files to output files
@@ -66,17 +74,32 @@ def test_copy(tmp_path):
     for ff in dest_files:
         assert os.path.isfile(ff)
 
-    # Create a config object for copying optional non-existent files (c.txt does not exist)
+    # Test 2 - Attempt to copy files to a non-writable directory
+    # Create a list of bad targets (/dev/null is unwritable)
+    bad_dest_files = ["/dev/null/a.txt", "/dev/null/bb.txt"]
+
+    bad_copy_list = []
+    for src, dest in zip(src_files, bad_dest_files):
+        bad_copy_list.append([src, dest])
+
+    # Create a config dictionary for FileHandler
+    bad_config = {'copy': bad_copy_list}
+
+    # Attempt to copy
+    with pytest.raises(OSError):
+        FileHandler(bad_config).sync()
+
+    # Test 3 - Attempt to copy missing, optional files to a writable directory
+    # Create a config dictionary (c.txt does not exist)
     copy_list.append([input_dir_path / 'c.txt', output_dir_path / 'c.txt'])
     config = {'copy_opt': copy_list}
 
-    # Copy input files to output files
+    # Copy input files to output files (should not raise an error)
     FileHandler(config).sync()
 
-    # Create a config object for copying required non-existent files (c.txt does not exist)
+    # Test 4 - Attempt to copy missing, required files to a writable directory
+    # Create a config dictionary (c.txt does not exist)
     config = {'copy_req': copy_list}
-    try:
+    c_file = input_dir_path / 'c.txt'
+    with pytest.raises(FileNotFoundError, match=f"Source file '{c_file}' does not exist"):
         FileHandler(config).sync()
-    except FileNotFoundError as e:
-        c_file = input_dir_path / 'c.txt'
-        assert f"Source file '{c_file}' does not exist" in str(e)

tests/test_sqlitedb.py

@@ -56,7 +56,7 @@ def test_remove_column(db):
     column_name = "address"
     db.remove_column("test_table", column_name)
 
-    # Verify that the column exists in the test table
+    # Verify that the column no longer exists in the test table
     assert not column_exists(db, "test_table", column_name)