Remove explicit transformation to lowercase prior validation

Signed-off-by: Hendrik Scherner <hendrik.scherner@web.de>

kedro/framework/cli/starters.py

@@ -1005,8 +1005,7 @@ def __str__(self) -> str:
 
     def validate(self, user_input: str) -> None:
         """Validate a given prompt value against the regex validator"""
-
-        if self.regexp and not re.match(self.regexp, user_input.lower()):
+        if self.regexp and not re.match(self.regexp, user_input):
             message = f"'{user_input}' is an invalid value for {(self.title).lower()}."
             click.secho(message, fg="red", err=True)
             click.secho(self.error_message, fg="red", err=True)

kedro/templates/project/prompts.yml

@@ -26,7 +26,7 @@ tools:
     7) Kedro-Viz: Kedro's native visualisation tool
 
     Which tools would you like to include in your project? [1-7/1,3/all/none]:
-  regex_validator: "^(all|none|(( )*\\d+( *- *\\d+)?( *, *\\d+( *- *\\d+)?)*( )*)?)$"
+  regex_validator: "(?i)^(all|none|(( )*\\d+( *- *\\d+)?( *, *\\d+( *- *\\d+)?)*( )*)?)$"
   error_message: |
     Invalid input. Please select valid options for project tools using comma-separated values, ranges, or 'all/none'.
 

tests/framework/cli/test_starters.py

@@ -422,19 +422,27 @@ def test_empty_prompts(self, fake_kedro_cli):
         _assert_template_ok(result)
         _clean_up_project(Path("./new-kedro-project"))
 
-    def test_custom_prompt_valid_input(self, fake_kedro_cli):
+    @pytest.mark.parametrize(
+        "regex, valid_value",
+        [
+            ("^\\w+(-*\\w+)*$", "my-value"),
+            ("^[A-Z_]+", "MY-VALUE"),
+            ("^\\d+$", "123"),
+        ],
+    )
+    def test_custom_prompt_valid_input(self, fake_kedro_cli, regex, valid_value):
         shutil.copytree(TEMPLATE_PATH, "template")
         _write_yaml(
             Path("template") / "prompts.yml",
             {
                 "project_name": {"title": "Project Name"},
                 "custom_value": {
                     "title": "Custom Value",
-                    "regex_validator": "^\\w+(-*\\w+)*$",
+                    "regex_validator": regex,
                 },
             },
         )
-        custom_input = "\n".join(["my-project", "My Project"])
+        custom_input = "\n".join([valid_value, "My Project"])
         result = CliRunner().invoke(
             fake_kedro_cli,
             ["new", "--starter", "template"],
@@ -446,6 +454,7 @@ def test_custom_prompt_valid_input(self, fake_kedro_cli):
             repo_name="my-project",
             python_package="my_project",
         )
+
         _clean_up_project(Path("./my-project"))
 
     def test_custom_prompt_for_essential_variable(self, fake_kedro_cli):