Add Validate::validate_and_return_fiurst_error

This method is completely redundant with `Validate::validate` right now,
but it will become useful in a moment, when I change `validate` to emit
an arbitrary number of errors.

crates/fj-kernel/src/validate/cycle.rs

@@ -117,8 +117,8 @@ mod tests {
             Cycle::new(half_edges)
         };
 
-        valid.validate()?;
-        assert!(invalid.validate().is_err());
+        valid.validate_and_return_first_error()?;
+        assert!(invalid.validate_and_return_first_error().is_err());
 
         Ok(())
     }

crates/fj-kernel/src/validate/edge.rs

@@ -275,8 +275,8 @@ mod tests {
             HalfEdge::new(vertices, valid.global_form().clone())
         };
 
-        valid.validate()?;
-        assert!(invalid.validate().is_err());
+        valid.validate_and_return_first_error()?;
+        assert!(invalid.validate_and_return_first_error().is_err());
 
         Ok(())
     }
@@ -301,8 +301,8 @@ mod tests {
             tmp.build(&mut services.objects)
         });
 
-        valid.validate()?;
-        assert!(invalid.validate().is_err());
+        valid.validate_and_return_first_error()?;
+        assert!(invalid.validate_and_return_first_error().is_err());
 
         Ok(())
     }
@@ -333,8 +333,8 @@ mod tests {
             tmp.build(&mut services.objects)
         });
 
-        valid.validate()?;
-        assert!(invalid.validate().is_err());
+        valid.validate_and_return_first_error()?;
+        assert!(invalid.validate_and_return_first_error().is_err());
 
         Ok(())
     }
@@ -370,8 +370,8 @@ mod tests {
             valid.global_form().clone(),
         );
 
-        valid.validate()?;
-        assert!(invalid.validate().is_err());
+        valid.validate_and_return_first_error()?;
+        assert!(invalid.validate_and_return_first_error().is_err());
 
         Ok(())
     }

crates/fj-kernel/src/validate/face.rs

@@ -151,8 +151,8 @@ mod tests {
             Face::new(valid.exterior().clone(), interiors, valid.color())
         };
 
-        valid.validate()?;
-        assert!(invalid.validate().is_err());
+        valid.validate_and_return_first_error()?;
+        assert!(invalid.validate_and_return_first_error().is_err());
 
         Ok(())
     }
@@ -188,8 +188,8 @@ mod tests {
             Face::new(valid.exterior().clone(), interiors, valid.color())
         };
 
-        valid.validate()?;
-        assert!(invalid.validate().is_err());
+        valid.validate_and_return_first_error()?;
+        assert!(invalid.validate_and_return_first_error().is_err());
 
         Ok(())
     }

crates/fj-kernel/src/validate/mod.rs

@@ -25,6 +25,11 @@ use fj_math::Scalar;
 ///
 /// This trait is used automatically when inserting an object into a store.
 pub trait Validate: Sized {
+    /// Validate the object using default config and return on first error
+    fn validate_and_return_first_error(&self) -> Result<(), ValidationError> {
+        self.validate()
+    }
+
     /// Validate the object using default configuration
     fn validate(&self) -> Result<(), ValidationError> {
         self.validate_with_config(&ValidationConfig::default())

crates/fj-kernel/src/validate/vertex.rs

@@ -234,8 +234,8 @@ mod tests {
             Vertex::new(valid.position(), valid.curve().clone(), surface_form)
         };
 
-        valid.validate()?;
-        assert!(invalid.validate().is_err());
+        valid.validate_and_return_first_error()?;
+        assert!(invalid.validate_and_return_first_error().is_err());
 
         Ok(())
     }
@@ -271,8 +271,8 @@ mod tests {
             Vertex::new(valid.position(), valid.curve().clone(), surface_form)
         };
 
-        valid.validate()?;
-        assert!(invalid.validate().is_err());
+        valid.validate_and_return_first_error()?;
+        assert!(invalid.validate_and_return_first_error().is_err());
 
         Ok(())
     }
@@ -293,8 +293,8 @@ mod tests {
             GlobalVertex::new([1., 0., 0.]).insert(&mut services.objects),
         );
 
-        valid.validate()?;
-        assert!(invalid.validate().is_err());
+        valid.validate_and_return_first_error()?;
+        assert!(invalid.validate_and_return_first_error().is_err());
 
         Ok(())
     }