Check up on restrictions to signac view (#926)

* Remove unnecessary restriction on view, test possibly bad characters

* test: Simplify view test logic

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* refactor(linked views): simplify logic.

* docs(changelog): Add #926 to changelog

* fix(linked views): Fix previous commmit.

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* test: Fix syntax errors in test_create_linked_view_with_slash_raises_error

---------

Co-authored-by: Brandon Butler <butlerbr@umich.edu>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

changelog.txt

@@ -7,6 +7,14 @@ The **signac** package follows `semantic versioning <https://semver.org/>`_.
 Version 2
 =========
 
+[2.2.0] -- 2023-xx-xx
+---------------------
+
+Changed
++++++++
+
+ - linked views now can contain spaces and other characters except directory separators (#926).
+
 [2.1.0] -- 2023-07-12
 ---------------------
 

signac/linked_view.py

@@ -41,7 +41,7 @@ def create_linked_view(project, prefix=None, job_ids=None, path=None):
         Linked views cannot be created on Windows because
         symbolic links are not supported by the platform.
     RuntimeError
-        When state points contain one of ``[os.sep, " ", "*"]``.
+        When state points contain ``os.sep``.
 
     """
     from .import_export import _check_directory_structure_validity, _make_path_function
@@ -64,19 +64,13 @@ def create_linked_view(project, prefix=None, job_ids=None, path=None):
     key_list = [k for job in jobs for k in job.statepoint().keys()]
     value_list = [v for job in jobs for v in job.statepoint().values()]
     item_list = key_list + value_list
-    bad_chars = [os.sep, " ", "*"]
-    bad_items = [
-        item
-        for item in item_list
-        for char in bad_chars
-        if isinstance(item, str) and char in item
-    ]
+    bad_items = [item for item in item_list if isinstance(item, str) and os.sep in item]
 
     if any(bad_items):
         err_msg = " ".join(
             [
-                f"In order to use view, state points should not contain {bad_chars}:",
-                *bad_items,
+                f"In order to use view, state points should not contain {os.sep}:",
+                str(set(bad_items)),
             ]
         )
         raise RuntimeError(err_msg)

tests/test_project.py

@@ -2038,13 +2038,22 @@ def test_create_linked_view_heterogeneous_schema_problematic(self):
 
     @pytest.mark.skipif(WINDOWS, reason="Linked views unsupported on Windows.")
     def test_create_linked_view_with_slash_raises_error(self):
-        bad_chars = [os.sep, " ", "*"]
-        statepoints = [{f"a{i}b": 0, "b": f"bad{i}val"} for i in bad_chars]
+        statepoint = {"b": f"bad{os.sep}val"}
+        view_prefix = os.path.join(self._tmp_pr, "view")
+        self.project.open_job(statepoint).init()
+        with pytest.raises(RuntimeError):
+            self.project.create_linked_view(prefix=view_prefix)
+
+    @pytest.mark.skipif(WINDOWS, reason="Linked views unsupported on Windows.")
+    def test_create_linked_view_weird_chars_in_file_name(self):
+        shell_escaped_chars = [" ", "*", "~"]
+        statepoints = [
+            {f"a{i}b": 0, "b": f"escaped{i}val"} for i in shell_escaped_chars
+        ]
         view_prefix = os.path.join(self._tmp_pr, "view")
         for sp in statepoints:
             self.project.open_job(sp).init()
-            with pytest.raises(RuntimeError):
-                self.project.create_linked_view(prefix=view_prefix)
+            self.project.create_linked_view(prefix=view_prefix)
 
     @pytest.mark.skipif(WINDOWS, reason="Linked views unsupported on Windows.")
     def test_create_linked_view_duplicate_paths(self):