*: avoid Result::is_{ok,err}

These methods discard information. Discarding information is bad.

aya-log-parser/Cargo.toml

@@ -11,5 +11,8 @@ edition.workspace = true
 [dependencies]
 aya-log-common = { path = "../aya-log-common", version = "^0.1.14", default-features = false }
 
+[dev-dependencies]
+assert_matches = { workspace = true }
+
 [lib]
 path = "src/lib.rs"

aya-log-parser/src/lib.rs

@@ -128,11 +128,10 @@ pub fn parse(format_string: &str) -> Result<Vec<Fragment>, String> {
 
 #[cfg(test)]
 mod test {
+    use assert_matches::assert_matches;
+
     use super::*;
 
-    // TODO(https://github.com/rust-lang/rust-clippy/issues/13885): narrow this to just the specific
-    // strings when that doesn't trip the lint.
-    #[allow(clippy::literal_string_with_formatting_args)]
     #[test]
     fn test_parse() {
         assert_eq!(
@@ -160,9 +159,9 @@ mod test {
                 }),
             ])
         );
-        assert!(parse("foo {:}").is_err());
-        assert!(parse("foo { bar").is_err());
-        assert!(parse("foo } bar").is_err());
-        assert!(parse("foo { bar }").is_err());
+        assert_matches!(parse("foo {:}"), Err(_));
+        assert_matches!(parse("foo { bar"), Err(_));
+        assert_matches!(parse("foo } bar"), Err(_));
+        assert_matches!(parse("foo { bar }"), Err(_));
     }
 }

aya/src/maps/bloom_filter.rs

@@ -20,15 +20,17 @@ use crate::{
 /// # Examples
 ///
 /// ```no_run
+/// # use assert_matches::assert_matches;
 /// # let mut bpf = aya::Ebpf::load(&[])?;
+/// use aya::maps::MapError;
 /// use aya::maps::bloom_filter::BloomFilter;
 ///
 /// let mut bloom_filter = BloomFilter::try_from(bpf.map_mut("BLOOM_FILTER").unwrap())?;
 ///
 /// bloom_filter.insert(1, 0)?;
 ///
-/// assert!(bloom_filter.contains(&1, 0).is_ok());
-/// assert!(bloom_filter.contains(&2, 0).is_err());
+/// assert_matches!(bloom_filter.contains(&1, 0), Ok(()));
+/// assert_matches!(bloom_filter.contains(&2, 0), Err(MapError::ElementNotFound));
 ///
 /// # Ok::<(), aya::EbpfError>(())
 /// ```
@@ -131,7 +133,7 @@ mod tests {
     fn test_new_ok() {
         let map = new_map(new_obj_map());
 
-        assert!(BloomFilter::<_, u32>::new(&map).is_ok());
+        let _: BloomFilter<_, u32> = BloomFilter::new(&map).unwrap();
     }
 
     #[test]
@@ -139,7 +141,7 @@ mod tests {
         let map = new_map(new_obj_map());
 
         let map = Map::BloomFilter(map);
-        assert!(BloomFilter::<_, u32>::try_from(&map).is_ok())
+        let _: BloomFilter<_, u32> = map.try_into().unwrap();
     }
 
     #[test]
@@ -168,7 +170,7 @@ mod tests {
             _ => sys_error(EFAULT),
         });
 
-        assert!(bloom_filter.insert(0, 42).is_ok());
+        assert_matches!(bloom_filter.insert(0, 42), Ok(()));
     }
 
     #[test]

aya/src/maps/hash_map/hash_map.rs

@@ -179,23 +179,23 @@ mod tests {
     #[test]
     fn test_new_ok() {
         let map = new_map(new_obj_map());
-        assert!(HashMap::<_, u32, u32>::new(&map).is_ok());
+        let _: HashMap<_, u32, u32> = HashMap::new(&map).unwrap();
     }
 
     #[test]
     fn test_try_from_ok() {
         let map = new_map(new_obj_map());
         let map = Map::HashMap(map);
-        assert!(HashMap::<_, u32, u32>::try_from(&map).is_ok())
+        let _: HashMap<_, u32, u32> = map.try_into().unwrap();
     }
 
     #[test]
     fn test_try_from_ok_lru() {
         let map_data = || new_map(test_utils::new_obj_map::<u32>(BPF_MAP_TYPE_LRU_HASH));
         let map = Map::HashMap(map_data());
-        assert!(HashMap::<_, u32, u32>::try_from(&map).is_ok());
+        let _: HashMap<_, u32, u32> = map.try_into().unwrap();
         let map = Map::LruHashMap(map_data());
-        assert!(HashMap::<_, u32, u32>::try_from(&map).is_ok())
+        let _: HashMap<_, u32, u32> = map.try_into().unwrap();
     }
 
     #[test]
@@ -224,7 +224,7 @@ mod tests {
             _ => sys_error(EFAULT),
         });
 
-        assert!(hm.insert(1, 42, 0).is_ok());
+        assert_matches!(hm.insert(1, 42, 0), Ok(()));
     }
 
     #[test]
@@ -240,7 +240,7 @@ mod tests {
             _ => sys_error(EFAULT),
         });
 
-        assert!(hm.insert(Box::new(1), Box::new(42), 0).is_ok());
+        assert_matches!(hm.insert(Box::new(1), Box::new(42), 0), Ok(()));
     }
 
     #[test]
@@ -269,7 +269,7 @@ mod tests {
             _ => sys_error(EFAULT),
         });
 
-        assert!(hm.remove(&1).is_ok());
+        assert_matches!(hm.remove(&1), Ok(()));
     }
 
     #[test]

aya/src/maps/hash_map/per_cpu_hash_map.rs

@@ -174,16 +174,16 @@ mod tests {
         let map = Map::PerCpuHashMap(test_utils::new_map(test_utils::new_obj_map::<u32>(
             BPF_MAP_TYPE_PERCPU_HASH,
         )));
-        assert!(PerCpuHashMap::<_, u32, u32>::try_from(&map).is_ok())
+        let _: PerCpuHashMap<_, u32, u32> = map.try_into().unwrap();
     }
     #[test]
     fn test_try_from_ok_lru() {
         let map_data =
             || test_utils::new_map(test_utils::new_obj_map::<u32>(BPF_MAP_TYPE_LRU_PERCPU_HASH));
         let map = Map::PerCpuHashMap(map_data());
-        assert!(PerCpuHashMap::<_, u32, u32>::try_from(&map).is_ok());
+        let _: PerCpuHashMap<_, u32, u32> = map.try_into().unwrap();
         let map = Map::PerCpuLruHashMap(map_data());
-        assert!(PerCpuHashMap::<_, u32, u32>::try_from(&map).is_ok())
+        let _: PerCpuHashMap<_, u32, u32> = map.try_into().unwrap();
     }
     #[test]
     fn test_get_not_found() {

aya/src/maps/lpm_trie.rs

@@ -260,7 +260,7 @@ mod tests {
     fn test_new_ok() {
         let map = new_map(new_obj_map());
 
-        assert!(LpmTrie::<_, u32, u32>::new(&map).is_ok());
+        let _: LpmTrie<_, u32, u32> = LpmTrie::new(&map).unwrap();
     }
 
     #[test]
@@ -268,7 +268,7 @@ mod tests {
         let map = new_map(new_obj_map());
 
         let map = Map::LpmTrie(map);
-        assert!(LpmTrie::<_, u32, u32>::try_from(&map).is_ok())
+        let _: LpmTrie<_, u32, u32> = map.try_into().unwrap();
     }
 
     #[test]
@@ -301,7 +301,7 @@ mod tests {
             _ => sys_error(EFAULT),
         });
 
-        assert!(trie.insert(&key, 1, 0).is_ok());
+        assert_matches!(trie.insert(&key, 1, 0), Ok(()));
     }
 
     #[test]
@@ -334,7 +334,7 @@ mod tests {
             _ => sys_error(EFAULT),
         });
 
-        assert!(trie.remove(&key).is_ok());
+        assert_matches!(trie.remove(&key), Ok(()));
     }
 
     #[test]

aya/src/programs/links.rs

@@ -634,11 +634,11 @@ mod tests {
         assert_eq!(*l1_detached.borrow(), 0);
         assert_eq!(*l2_detached.borrow(), 0);
 
-        assert!(links.remove(id1).is_ok());
+        links.remove(id1).unwrap();
         assert_eq!(*l1_detached.borrow(), 1);
         assert_eq!(*l2_detached.borrow(), 0);
 
-        assert!(links.remove(id2).is_ok());
+        links.remove(id2).unwrap();
         assert_eq!(*l1_detached.borrow(), 1);
         assert_eq!(*l2_detached.borrow(), 1);
     }
@@ -678,7 +678,7 @@ mod tests {
             let id1 = links.insert(l1).unwrap();
             links.insert(l2).unwrap();
             // manually remove one link
-            assert!(links.remove(id1).is_ok());
+            links.remove(id1).unwrap();
             assert_eq!(*l1_detached.borrow(), 1);
             assert_eq!(*l2_detached.borrow(), 0);
         }
@@ -710,7 +710,7 @@ mod tests {
         assert_eq!(*l2_detached.borrow(), 1);
 
         // manually detach l1
-        assert!(owned_l1.detach().is_ok());
+        owned_l1.detach().unwrap();
         assert_eq!(*l1_detached.borrow(), 1);
         assert_eq!(*l2_detached.borrow(), 1);
     }

aya/src/programs/uprobe.rs

@@ -716,7 +716,7 @@ mod tests {
         let align_bytes = aligned_slice(&mut debug_bytes);
         let debug_obj = object::File::parse(&*align_bytes).expect("got debug obj");
 
-        assert!(verify_build_ids(&main_obj, &debug_obj, "symbol_name").is_ok());
+        verify_build_ids(&main_obj, &debug_obj, "symbol_name").unwrap();
     }
 
     #[test]

aya/src/util.rs

@@ -441,9 +441,9 @@ mod tests {
             parse_cpu_ranges("0-5,6,7").unwrap(),
             (0..=7).collect::<Vec<_>>()
         );
-        assert!(parse_cpu_ranges("").is_err());
-        assert!(parse_cpu_ranges("0-1,2-").is_err());
-        assert!(parse_cpu_ranges("foo").is_err());
+        assert_matches!(parse_cpu_ranges(""), Err(_));
+        assert_matches!(parse_cpu_ranges("0-1,2-"), Err(_));
+        assert_matches!(parse_cpu_ranges("foo"), Err(_));
     }
 
     #[test]