Fix serde_complex example

CHANGELOG.md

@@ -7,6 +7,7 @@
   * Support `Arbitrary` for any inner types
 * Ability to specify boundaries (`greater`, `greater_or_equal`, `less`, `less_or_equal`, `len_char_min`, `len_char_max`) with expressions or named constants.
 * Add `#[inline]` attribute to trivial functions
+* Improve error messages
 
 ### v0.4.0 - 2023-11-21
 * Support of arbitrary inner types with custom sanitizers and validators.

examples/serde_complex/src/main.rs

@@ -43,7 +43,10 @@ fn main() {
         "#;
         let res: Result<Product, _> = serde_json::from_str(json);
         let err = res.unwrap_err();
-        assert!(err.to_string().contains("empty, expected valid Name"));
+        assert_eq!(
+            err.to_string(),
+            "Name is empty. Expected valid Name at line 3 column 27"
+        );
     }
 
     {
@@ -57,7 +60,10 @@ fn main() {
         "#;
         let res: Result<Product, _> = serde_json::from_str(json);
         let err = res.unwrap_err();
-        assert!(err.to_string().contains("invalid, expected valid ImageUrl"));
+        assert_eq!(
+            err.to_string(),
+            "ImageUrl failed the predicate test. Expected valid ImageUrl at line 4 column 60"
+        );
     }
 
     {
@@ -71,7 +77,10 @@ fn main() {
         "#;
         let res: Result<Product, _> = serde_json::from_str(json);
         let err = res.unwrap_err();
-        assert!(err.to_string().contains("too small, expected valid Price"));
+        assert_eq!(
+            err.to_string(),
+            "Price is too small. The value must be greater than 0.0. Expected valid Price at line 6 column 13"
+        );
     }
 
     {

nutype_macros/src/common/gen/traits.rs

@@ -241,7 +241,7 @@ pub fn gen_impl_trait_serde_deserialize(
         quote! {
             #type_name::new(raw_value).map_err(|validation_error| {
                 // Add a hint about which type is causing the error,
-                let err_msg = format!("{validation_error}, expected valid {}", #type_name_str);
+                let err_msg = format!("{validation_error} Expected valid {}", #type_name_str);
                 <DE::Error as serde::de::Error>::custom(err_msg)
             })
         }

test_suite/tests/any.rs

@@ -200,7 +200,10 @@ mod traits {
 
             {
                 let err = "5,5".parse::<Position>().unwrap_err();
-                assert_eq!(err.to_string(), "Failed to parse Position: invalid");
+                assert_eq!(
+                    err.to_string(),
+                    "Failed to parse Position: Position failed the predicate test."
+                );
             }
         }
     }
@@ -284,7 +287,10 @@ mod traits {
 
                 {
                     let err = serde_json::from_str::<LinePoint>("{\"x\":7,\"y\":9}").unwrap_err();
-                    assert_eq!(err.to_string(), "invalid, expected valid LinePoint");
+                    assert_eq!(
+                        err.to_string(),
+                        "LinePoint failed the predicate test. Expected valid LinePoint"
+                    );
                 }
 
                 {

test_suite/tests/float.rs

@@ -253,7 +253,10 @@ mod validators {
 
             let err = Percentage::try_from(-0.1).unwrap_err();
 
-            assert_eq!(err.to_string(), "too small");
+            assert_eq!(
+                err.to_string(),
+                "Percentage is too small. The value must be greater or equal to 0.0."
+            );
         }
     }
 }
@@ -457,7 +460,10 @@ mod traits {
 
         // Unhappy path: validation error
         let err: DistParseError = "12.35".parse::<Dist>().unwrap_err();
-        assert_eq!(err.to_string(), "Failed to parse Dist: too big");
+        assert_eq!(
+            err.to_string(),
+            "Failed to parse Dist: Dist is too big. The value must be less than 12.34."
+        );
     }
 
     #[test]

test_suite/tests/integer.rs

@@ -220,7 +220,10 @@ mod validators {
 
             let err = Age::try_from(17).unwrap_err();
 
-            assert_eq!(err.to_string(), "too small");
+            assert_eq!(
+                err.to_string(),
+                "Age is too small. The value must be greater or equal to 18."
+            );
         }
     }
 }
@@ -608,7 +611,10 @@ mod traits {
 
         // Unhappy path: validation error
         let err: AgeParseError = "101".parse::<Age>().unwrap_err();
-        assert_eq!(err.to_string(), "Failed to parse Age: too big");
+        assert_eq!(
+            err.to_string(),
+            "Failed to parse Age: Age is too big. The value must be less or equal to 99."
+        );
     }
 
     #[test]

test_suite/tests/string.rs

@@ -223,7 +223,7 @@ mod validators {
         #[nutype(validate(not_empty))]
         pub struct Email(String);
 
-        assert_eq!(EmailError::NotEmptyViolated.to_string(), "empty");
+        assert_eq!(EmailError::NotEmptyViolated.to_string(), "Email is empty.");
     }
 
     mod when_boundaries_defined_as_constants {

test_suite/tests/ui/float/visibility/private.stderr

@@ -13,5 +13,5 @@ note: ...and refers to the struct `Percentage` which is defined here
   --> tests/ui/float/visibility/private.rs:4:5
    |
 4  |     #[nutype(sanitize(with = |n| n.clamp(0.0, 100.0)))]
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ consider importing it directly
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ you could import this directly
    = note: this error originates in the attribute macro `nutype` (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/float/visibility/private_error.stderr

@@ -13,5 +13,5 @@ note: ...and refers to the enum `PercentageError` which is defined here
  --> tests/ui/float/visibility/private_error.rs:4:5
   |
 4 |     #[nutype(validate(greater_or_equal = 0.0, less_or_equal = 100.0))]
-  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ consider importing it directly
+  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ you could import this directly
   = note: this error originates in the attribute macro `nutype` (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/integer/visibility/private.stderr

@@ -13,5 +13,5 @@ note: ...and refers to the struct `Percentage` which is defined here
   --> tests/ui/integer/visibility/private.rs:4:5
    |
 4  |     #[nutype(sanitize(with = |n: i32| n.clamp(0, 100)))]
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ consider importing it directly
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ you could import this directly
    = note: this error originates in the attribute macro `nutype` (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/integer/visibility/private_error.stderr

@@ -13,5 +13,5 @@ note: ...and refers to the enum `PercentageError` which is defined here
  --> tests/ui/integer/visibility/private_error.rs:4:5
   |
 4 |     #[nutype(validate(greater_or_equal = 0, less_or_equal = 100))]
-  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ consider importing it directly
+  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ you could import this directly
   = note: this error originates in the attribute macro `nutype` (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/string/visibility/private.stderr

@@ -13,5 +13,5 @@ note: ...and refers to the struct `Email` which is defined here
   --> tests/ui/string/visibility/private.rs:4:5
    |
 4  |     #[nutype(sanitize(trim))]
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ consider importing it directly
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ you could import this directly
    = note: this error originates in the attribute macro `nutype` (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/string/visibility/private_error.stderr

@@ -13,5 +13,5 @@ note: ...and refers to the enum `NameError` which is defined here
  --> tests/ui/string/visibility/private_error.rs:4:5
   |
 4 |     #[nutype(validate(not_empty))]
-  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ consider importing it directly
+  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ you could import this directly
   = note: this error originates in the attribute macro `nutype` (in Nightly builds, run with -Z macro-backtrace for more info)