Add test for end of path is slash

tests/bdd/features/file_storage.feature

@@ -31,6 +31,14 @@ Feature: Journals iteracting with the file system in a way that users can see
         When we run "jrnl -99 --short"
         Then the output should contain "This is a new entry in my journal"
     
+    Scenario: If the directory for a Folder journal ending in a slash ('/' or '\') doesn't exist, then it should be created
+        Given we use the config "missing_directory.yaml"
+        Then the journal "endslash" directory should not exist
+        When we run "jrnl endslash This is a new entry in my journal"
+        Then the journal "endslash" directory should exist
+        When we run "jrnl endslash -1"
+        Then the output should contain "This is a new entry in my journal"
+
     Scenario: Creating journal with relative path should update to absolute path
         Given we use no config
         When we run "jrnl hello world" and enter

tests/data/configs/missing_directory.yaml

@@ -5,6 +5,7 @@ encrypt: false
 highlight: true
 journals:
   default: features/journals/missing_directory/simple.journal
+  endslash: features/journals/missing_folder/
 linewrap: 80
 tagsymbols: "@"
 template: false

tests/lib/then_steps.py

@@ -210,6 +210,22 @@ def journal_should_not_exist(config_on_disk, should_or_should_not):
         )
 
 
+@then(parse('the journal "{journal_name}" directory {should_or_should_not} exist'))
+def directory_should_not_exist(config_on_disk, should_or_should_not, journal_name):
+    scoped_config = scope_config(config_on_disk, journal_name)
+    expected_path = scoped_config["journal"]
+
+    dir_exists = os.path.isdir(expected_path)
+    if should_or_should_not == "should":
+        assert dir_exists
+    elif should_or_should_not == "should not":
+        assert not dir_exists
+    else:
+        raise Exception(
+            "should_or_should_not valid values are 'should' or 'should not'"
+        )
+
+
 @then(parse('the content of file "{file_path}" in the cache should be\n{file_content}'))
 def content_of_file_should_be(file_path, file_content, cache_dir):
     assert cache_dir["exists"]