Add Error + test

.changeset/old-heads-give.md

@@ -0,0 +1,5 @@
+---
+"gradio": minor
+---
+
+feat:Add Error + test

gradio/cli/commands/components/_create_utils.py

@@ -180,7 +180,9 @@ def _create_backend(
         module = "layouts"
     else:
         raise ValueError(
-            f"Cannot find {component.template} in gradio.components or gradio.layouts"
+            f"Cannot find {component.template} in gradio.components or gradio.layouts. "
+            "Please pass in a valid component name via the --template option. "
+            "It must match the name of the python class exactly."
         )
 
     backend = directory / "backend" / package_name

gradio/cli/commands/components/create.py

@@ -1,6 +1,6 @@
-import pathlib
 import shutil
 import subprocess
+from pathlib import Path
 from typing import Optional
 
 import typer
@@ -20,7 +20,7 @@ def _create(
         ),
     ],
     directory: Annotated[
-        Optional[pathlib.Path],
+        Optional[Path],
         typer.Option(
             help="Directory to create the component in. Default is None. If None, will be created in <component-name> directory in the current directory."
         ),
@@ -51,7 +51,7 @@ def _create(
     ] = False,
 ):
     if not directory:
-        directory = pathlib.Path(name.lower())
+        directory = Path(name.lower())
     if not package_name:
         package_name = f"gradio_{name.lower()}"
 
@@ -90,12 +90,12 @@ def _create(
 
         component = _create_utils._get_component_code(template)
 
-        _create_utils._create_frontend(name.lower(), component, directory=directory)
-        live.update(":art: Created frontend code", add_sleep=0.2)
-
         _create_utils._create_backend(name, component, directory, package_name)
         live.update(":snake: Created backend code", add_sleep=0.2)
 
+        _create_utils._create_frontend(name.lower(), component, directory=directory)
+        live.update(":art: Created frontend code", add_sleep=0.2)
+
         if install:
             cmds = ["pip", "install", "-e", f"{str(directory)}"]
             live.update(

test/test_gradio_component_cli.py

@@ -0,0 +1,13 @@
+import pytest
+
+from gradio.cli.commands.components.create import _create
+
+
+def test_raise_error_component_template_does_not_exist(tmp_path):
+    with pytest.raises(
+        ValueError,
+        match="Cannot find NonExistentComponent in gradio.components or gradio.layouts",
+    ):
+        _create(
+            "MyComponent", tmp_path, template="NonExistentComponent", overwrite=True
+        )