jid: Rename errors to make them more consistent

jid/src/error.rs

@@ -14,18 +14,15 @@ use std::fmt;
 /// An error that signifies that a `Jid` cannot be parsed from a string.
 #[derive(Debug, PartialEq, Eq)]
 pub enum Error {
+    /// Happens when the node is empty, that is the string starts with a @.
+    NodeEmpty,
+
     /// Happens when there is no domain, that is either the string is empty,
     /// starts with a /, or contains the @/ sequence.
-    NoDomain,
-
-    /// Happens when there is no resource, that is string contains no /.
-    NoResource,
-
-    /// Happens when the node is empty, that is the string starts with a @.
-    EmptyNode,
+    DomainEmpty,
 
     /// Happens when the resource is empty, that is the string ends with a /.
-    EmptyResource,
+    ResourceEmpty,
 
     /// Happens when the localpart is longer than 1023 bytes.
     NodeTooLong,
@@ -45,6 +42,9 @@ pub enum Error {
     /// Happens when the resource is invalid according to resourceprep.
     ResourcePrep,
 
+    /// Happens when there is no resource, that is string contains no /.
+    ResourceMissingInFullJid,
+
     /// Happens when parsing a bare JID and there is a resource.
     ResourceInBareJid,
 }
@@ -54,16 +54,16 @@ impl StdError for Error {}
 impl fmt::Display for Error {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
         fmt.write_str(match self {
-            Error::NoDomain => "no domain found in this JID",
-            Error::NoResource => "no resource found in this full JID",
-            Error::EmptyNode => "nodepart empty despite the presence of a @",
-            Error::EmptyResource => "resource empty despite the presence of a /",
+            Error::NodeEmpty => "nodepart empty despite the presence of a @",
+            Error::DomainEmpty => "no domain found in this JID",
+            Error::ResourceEmpty => "resource empty despite the presence of a /",
             Error::NodeTooLong => "localpart longer than 1023 bytes",
             Error::DomainTooLong => "domain longer than 1023 bytes",
             Error::ResourceTooLong => "resource longer than 1023 bytes",
             Error::NodePrep => "localpart doesn’t pass nodeprep validation",
             Error::NamePrep => "domain doesn’t pass nameprep validation",
             Error::ResourcePrep => "resource doesn’t pass resourceprep validation",
+            Error::ResourceMissingInFullJid => "no resource found in this full JID",
             Error::ResourceInBareJid => "resource found while parsing a bare JID",
         })
     }

jid/src/inner.rs

@@ -46,14 +46,14 @@ impl InnerJid {
         let normalized = match (orig_at, orig_slash) {
             (Some(at), Some(slash)) => {
                 let node = nodeprep(&unnormalized[..at]).map_err(|_| Error::NodePrep)?;
-                length_check(node.len(), Error::EmptyNode, Error::NodeTooLong)?;
+                length_check(node.len(), Error::NodeEmpty, Error::NodeTooLong)?;
 
                 let domain = nameprep(&unnormalized[at + 1..slash]).map_err(|_| Error::NamePrep)?;
-                length_check(domain.len(), Error::NoDomain, Error::DomainTooLong)?;
+                length_check(domain.len(), Error::DomainEmpty, Error::DomainTooLong)?;
 
                 let resource =
                     resourceprep(&unnormalized[slash + 1..]).map_err(|_| Error::ResourcePrep)?;
-                length_check(resource.len(), Error::EmptyResource, Error::ResourceTooLong)?;
+                length_check(resource.len(), Error::ResourceEmpty, Error::ResourceTooLong)?;
 
                 orig_at = Some(node.len());
                 orig_slash = Some(node.len() + domain.len() + 1);
@@ -61,28 +61,28 @@ impl InnerJid {
             }
             (Some(at), None) => {
                 let node = nodeprep(&unnormalized[..at]).map_err(|_| Error::NodePrep)?;
-                length_check(node.len(), Error::EmptyNode, Error::NodeTooLong)?;
+                length_check(node.len(), Error::NodeEmpty, Error::NodeTooLong)?;
 
                 let domain = nameprep(&unnormalized[at + 1..]).map_err(|_| Error::NamePrep)?;
-                length_check(domain.len(), Error::NoDomain, Error::DomainTooLong)?;
+                length_check(domain.len(), Error::DomainEmpty, Error::DomainTooLong)?;
 
                 orig_at = Some(node.len());
                 format!("{node}@{domain}")
             }
             (None, Some(slash)) => {
                 let domain = nameprep(&unnormalized[..slash]).map_err(|_| Error::NamePrep)?;
-                length_check(domain.len(), Error::NoDomain, Error::DomainTooLong)?;
+                length_check(domain.len(), Error::DomainEmpty, Error::DomainTooLong)?;
 
                 let resource =
                     resourceprep(&unnormalized[slash + 1..]).map_err(|_| Error::ResourcePrep)?;
-                length_check(resource.len(), Error::EmptyResource, Error::ResourceTooLong)?;
+                length_check(resource.len(), Error::ResourceEmpty, Error::ResourceTooLong)?;
 
                 orig_slash = Some(domain.len());
                 format!("{domain}/{resource}")
             }
             (None, None) => {
                 let domain = nameprep(unnormalized).map_err(|_| Error::NamePrep)?;
-                length_check(domain.len(), Error::NoDomain, Error::DomainTooLong)?;
+                length_check(domain.len(), Error::DomainEmpty, Error::DomainTooLong)?;
 
                 domain.into_owned()
             }

jid/src/lib.rs

@@ -158,7 +158,7 @@ impl TryFrom<Jid> for FullJid {
     fn try_from(jid: Jid) -> Result<Self, Self::Error> {
         match jid {
             Jid::Full(full) => Ok(full),
-            Jid::Bare(_) => Err(Error::NoResource),
+            Jid::Bare(_) => Err(Error::ResourceMissingInFullJid),
         }
     }
 }
@@ -351,7 +351,7 @@ impl FullJid {
         if inner.slash.is_some() {
             Ok(FullJid { inner })
         } else {
-            Err(Error::NoResource)
+            Err(Error::ResourceMissingInFullJid)
         }
     }
 
@@ -549,8 +549,14 @@ mod tests {
             Ok(FullJid::new("b.c/d").unwrap())
         );
 
-        assert_eq!(FullJid::from_str("a@b.c"), Err(Error::NoResource));
-        assert_eq!(FullJid::from_str("b.c"), Err(Error::NoResource));
+        assert_eq!(
+            FullJid::from_str("a@b.c"),
+            Err(Error::ResourceMissingInFullJid)
+        );
+        assert_eq!(
+            FullJid::from_str("b.c"),
+            Err(Error::ResourceMissingInFullJid)
+        );
     }
 
     #[test]
@@ -606,7 +612,7 @@ mod tests {
         assert_eq!(FullJid::try_from(Jid::Full(full.clone())), Ok(full.clone()));
         assert_eq!(
             FullJid::try_from(Jid::Bare(bare.clone())),
-            Err(Error::NoResource),
+            Err(Error::ResourceMissingInFullJid),
         );
         assert_eq!(Jid::Bare(full.clone().to_bare()), bare.clone());
         assert_eq!(Jid::Bare(bare.clone()), bare);
@@ -631,18 +637,21 @@ mod tests {
 
     #[test]
     fn invalid_jids() {
-        assert_eq!(BareJid::from_str(""), Err(Error::NoDomain));
-        assert_eq!(BareJid::from_str("/c"), Err(Error::NoDomain));
-        assert_eq!(BareJid::from_str("a@/c"), Err(Error::NoDomain));
-        assert_eq!(BareJid::from_str("@b"), Err(Error::EmptyNode));
-        assert_eq!(BareJid::from_str("b/"), Err(Error::EmptyResource));
+        assert_eq!(BareJid::from_str(""), Err(Error::DomainEmpty));
+        assert_eq!(BareJid::from_str("/c"), Err(Error::DomainEmpty));
+        assert_eq!(BareJid::from_str("a@/c"), Err(Error::DomainEmpty));
+        assert_eq!(BareJid::from_str("@b"), Err(Error::NodeEmpty));
+        assert_eq!(BareJid::from_str("b/"), Err(Error::ResourceEmpty));
 
-        assert_eq!(FullJid::from_str(""), Err(Error::NoDomain));
-        assert_eq!(FullJid::from_str("/c"), Err(Error::NoDomain));
-        assert_eq!(FullJid::from_str("a@/c"), Err(Error::NoDomain));
-        assert_eq!(FullJid::from_str("@b"), Err(Error::EmptyNode));
-        assert_eq!(FullJid::from_str("b/"), Err(Error::EmptyResource));
-        assert_eq!(FullJid::from_str("a@b"), Err(Error::NoResource));
+        assert_eq!(FullJid::from_str(""), Err(Error::DomainEmpty));
+        assert_eq!(FullJid::from_str("/c"), Err(Error::DomainEmpty));
+        assert_eq!(FullJid::from_str("a@/c"), Err(Error::DomainEmpty));
+        assert_eq!(FullJid::from_str("@b"), Err(Error::NodeEmpty));
+        assert_eq!(FullJid::from_str("b/"), Err(Error::ResourceEmpty));
+        assert_eq!(
+            FullJid::from_str("a@b"),
+            Err(Error::ResourceMissingInFullJid)
+        );
     }
 
     #[test]