Introduce 'ArgBy' to allow defining function arg not only by name.

crates/aiken-project/src/test_framework.rs

@@ -1,6 +1,6 @@
 use aiken_lang::ast::OnTestFailure;
 pub(crate) use aiken_lang::{
-    ast::{Arg, BinOp, DataTypeKey, IfBranch, Span, TypedDataType, TypedTest},
+    ast::{BinOp, DataTypeKey, IfBranch, Span, TypedArg, TypedDataType, TypedTest},
     builtins::bool,
     expr::{TypedExpr, UntypedExpr},
     format::Formatter,
@@ -124,13 +124,13 @@ impl Test {
 
             let via = parameter.via.clone();
 
-            let type_info = parameter.tipo.clone();
+            let type_info = parameter.arg.tipo.clone();
 
             let stripped_type_info = convert_opaque_type(&type_info, generator.data_types(), true);
 
             let program = generator.clone().generate_raw(
                 &test.body,
-                &[Arg {
+                &[TypedArg {
                     tipo: stripped_type_info.clone(),
                     ..parameter.clone().into()
                 }],
@@ -507,8 +507,10 @@ impl Prng {
         fn as_prng(cst: &PlutusData) -> Prng {
             if let PlutusData::Constr(Constr { tag, fields, .. }) = cst {
                 if *tag == 121 + Prng::SEEDED {
-                    if let [PlutusData::BoundedBytes(bytes), PlutusData::BoundedBytes(choices)] =
-                        &fields[..]
+                    if let [
+                        PlutusData::BoundedBytes(bytes),
+                        PlutusData::BoundedBytes(choices),
+                    ] = &fields[..]
                     {
                         return Prng::Seeded {
                             choices: choices.to_vec(),
@@ -1087,9 +1089,11 @@ impl TryFrom<TypedExpr> for Assertion<TypedExpr> {
                 final_else,
                 ..
             } => {
-                if let [IfBranch {
-                    condition, body, ..
-                }] = &branches[..]
+                if let [
+                    IfBranch {
+                        condition, body, ..
+                    },
+                ] = &branches[..]
                 {
                     let then_is_true = match body {
                         TypedExpr::Var {
@@ -1508,13 +1512,14 @@ mod test {
             }
         "#});
 
-        assert!(prop
-            .run::<()>(
+        assert!(
+            prop.run::<()>(
                 42,
                 PropertyTest::DEFAULT_MAX_SUCCESS,
                 &PlutusVersion::default()
             )
-            .is_success());
+            .is_success()
+        );
     }
 
     #[test]