test: Add UI test for unsupported parsers

clap-rs · Feb 15, 2022 · bd68653 · bd68653
1 parent bbf4722
commit bd68653
Show file tree

Hide file tree

Showing 2 changed files with 16 additions and 0 deletions.
diff --git a/tests/derive_ui/unsupported_parser.rs b/tests/derive_ui/unsupported_parser.rs
@@ -0,0 +1,11 @@
+use clap::Parser;
+
+#[derive(Parser, Clone, Debug)]
+struct Opt {
+    #[clap(parse(not_a_valid_parser))]
+    value: i8,
+}
+
+fn main() {
+    println!("{:?}", Opt::parse());
+}
diff --git a/tests/derive_ui/unsupported_parser.stderr b/tests/derive_ui/unsupported_parser.stderr
@@ -0,0 +1,5 @@
+error: unsupported parser `not_a_valid_parser`
+ --> tests/derive_ui/unsupported_parser.rs:5:18
+  |
+5 |     #[clap(parse(not_a_valid_parser))]
+  |                  ^^^^^^^^^^^^^^^^^^