Test teloxide-macros with a parse_with bug fix

Cargo.toml

@@ -58,7 +58,7 @@ full = [
 
 [dependencies]
 teloxide-core = { version = "0.7.0", default-features = false }
-teloxide-macros = { version = "0.6.2", optional = true }
+# teloxide-macros = { version = "0.6.2", optional = true }
 
 serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }
@@ -67,6 +67,7 @@ dptree = "0.3.0"
 
 # These lines are used only for development.
 # teloxide-core = { git = "https://github.com/teloxide/teloxide-core", rev = "b13393d", default-features = false }
+teloxide-macros = { git = "https://github.com/teloxide/teloxide-macros", rev = "44d91c5", optional = true }
 # dptree = { git = "https://github.com/teloxide/dptree", rev = "df578e4" }
 
 tokio = { version = "1.8", features = ["fs"] }

tests/command.rs

@@ -2,7 +2,7 @@
 #![allow(clippy::nonstandard_macro_braces)]
 
 #[cfg(feature = "macros")]
-use teloxide::utils::command::{BotCommands, ParseError};
+use teloxide::utils::command::BotCommands;
 
 // We put tests here because macro expand in unit tests in module
 // teloxide::utils::command was a failure
@@ -141,22 +141,33 @@ fn parse_with_split2() {
 #[test]
 #[cfg(feature = "macros")]
 fn parse_custom_parser() {
-    fn custom_parse_function(s: String) -> Result<(u8, String), ParseError> {
+    mod parser {
+        use teloxide::utils::command::ParseError;
+
+        pub fn custom_parse_function(s: String) -> Result<(u8, String), ParseError> {
             let vec = s.split_whitespace().collect::<Vec<_>>();
             let (left, right) = match vec.as_slice() {
                 [l, r] => (l, r),
                 _ => return Err(ParseError::IncorrectFormat("might be 2 arguments!".into())),
             };
-        left.parse::<u8>()
+            left.parse::<u8>().map(|res| (res, (*right).to_string())).map_err(|_| {
-            .map(|res| (res, (*right).to_string()))
+                ParseError::Custom("First argument must be a integer!".to_owned().into())
-            .map_err(|_| ParseError::Custom("First argument must be a integer!".to_owned().into()))
+            })
         }
+    }
+
+    use parser::custom_parse_function;
 
     #[derive(BotCommands, Debug, PartialEq)]
     #[command(rename = "lowercase")]
     enum DefaultCommands {
         #[command(parse_with = "custom_parse_function")]
         Start(u8, String),
+
+        // Test <https://github.com/teloxide/teloxide/issues/668>.
+        #[command(parse_with = "parser::custom_parse_function")]
+        TestPath(u8, String),
+
         Help,
     }
 
@@ -164,6 +175,10 @@ fn parse_custom_parser() {
         DefaultCommands::Start(10, "hello".to_string()),
         DefaultCommands::parse("/start 10 hello", "").unwrap()
     );
+    assert_eq!(
+        DefaultCommands::TestPath(10, "hello".to_string()),
+        DefaultCommands::parse("/testpath 10 hello", "").unwrap()
+    );
 }
 
 #[test]