Skip the dash tests when Dash is not installed

Author: mwouts

src/itables/dash.py

@@ -5,6 +5,7 @@
     ITableOutputs,
     __version__,
     get_itable_component_kwargs,
+    itables_for_dash_is_available,
     updated_itable_outputs,
 )
 
@@ -15,5 +16,6 @@
     "get_itable_component_kwargs",
     "ITableOutputs",
     "updated_itable_outputs",
+    "itables_for_dash_is_available",
     "__version__",
 ]

src/itables_for_dash/__init__.py

@@ -1,6 +1,18 @@
 from itables import __version__
 
-from .ITable import ITable as ITableComponent
+try:
+    from .ITable import ITable as ITableComponent
+except (ImportError, ModuleNotFoundError) as e:
+    import_error = e
+
+    class ITableComponent:
+        def __init__(self, *args, **kwargs):
+            raise import_error
+
+    itables_for_dash_is_available = False
+else:
+    itables_for_dash_is_available = True
+
 from .properties import (
     ITABLE_PROPERTIES,
     ITableOutputs,

src/itables_for_dash/properties.py

@@ -1,4 +1,14 @@
-from dash import Output, no_update
+try:
+    from dash import Output, no_update
+except ImportError as e:
+    import_error = e
+
+    def Output(*args, **kwargs):
+        raise import_error
+
+    def no_update(*args, **kwargs):
+        raise import_error
+
 
 from itables.javascript import get_itables_extension_arguments
 

tests/test_itables_for_dash.py

@@ -1,7 +1,12 @@
 import os
 import sys
 
-from itables.dash import ITable, ITableComponent
+import pytest
+
+from itables.dash import ITable, ITableComponent, itables_for_dash_is_available
+
+if not itables_for_dash_is_available:
+    pytestmark = pytest.mark.skip(reason="itables_for_dash is not available")
 
 
 def check_ressource(relative_package_path, namespace, **kwargs):