tests: Fix invalid custom test

In the custom tests, only the first test case is ever checked, if the
value is above zero. Fix this by inverting the conditions and letting
the function return Ok later. Returning Ok was already present in the
function.

Signed-off-by: Esa Laakso <[email protected]>

serde_valid/src/validation/custom.rs

@@ -55,17 +55,13 @@ mod test {
     fn test_custom_fn_multiple_errors() {
         fn multiple_errors(data: &i32) -> Result<(), Vec<crate::validation::Error>> {
             let mut errors = Vec::new();
-            if *data > 0 {
-                return Ok(());
-            } else {
+            if *data < 1 {
                 errors.push(crate::validation::Error::Custom(
                     "Value must be greater than 0".to_string(),
                 ));
             }
 
-            if *data < 10 {
-                return Ok(());
-            } else {
+            if *data >= 10 {
                 errors.push(crate::validation::Error::Custom(
                     "Value must be less than 10".to_string(),
                 ));