Add test for use of impl AsRef in arguments

Author: andrewhickman

examples/context.rs

@@ -3,13 +3,13 @@ use std::path::Path;
 
 use fn_error_context::error_context;
 
-#[error_context("failed to parse config at `{}`", path.display())]
-pub fn parse_config(path: &Path) -> anyhow::Result<u32> {
-    let text = read_to_string(path)?;
+#[error_context("failed to parse config at `{}`", path.as_ref().display())]
+pub fn parse_config(path: impl AsRef<Path>) -> anyhow::Result<u32> {
+    let text = read_to_string(path.as_ref())?;
     Ok(text.parse()?)
 }
 
 fn main() -> anyhow::Result<()> {
-    println!("config: {}", parse_config("config".as_ref())?);
+    println!("config: {}", parse_config("config")?);
     Ok(())
 }

tests/as_ref.rs

@@ -0,0 +1,13 @@
+use fn_error_context::error_context;
+
+#[error_context("context {}", arg.as_ref())]
+fn do_stuff(arg: impl AsRef<str>) -> anyhow::Result<()> {
+    anyhow::bail!("error {}", arg.as_ref())
+}
+
+fn main() {
+    assert_eq!(
+        format!("{:#}", do_stuff("hello").unwrap_err()),
+        "context hello: error hello"
+    );
+}

tests/tests.rs

@@ -11,4 +11,5 @@ fn tests() {
     tests.pass("tests/failure.rs");
     tests.pass("tests/non_copy_arg.rs");
     tests.pass("tests/non_copy_fmt_arg.rs");
+    tests.pass("tests/as_ref.rs");
 }