[wip] unit tests for file module

- testing for `compute_hash` and `check_hash`

src/error.rs

@@ -121,6 +121,18 @@ impl Error {
         }
     }
 
+    pub fn is_mismatch<E, A>(&self, has_expected: E, has_actual: A) -> bool
+    where
+        String: PartialEq<E> + PartialEq<A>,
+    {
+        matches!(
+            self,
+            Self::Mismatch { expected, actual }
+                if *expected == has_expected
+                && *actual == has_actual
+        )
+    }
+
     #[must_use]
     pub fn get_invalid_param(&self) -> Option<&Parameter> {
         if let Self::InvalidParameter(p) = self {

src/file/mod.rs

@@ -154,26 +154,35 @@ mod tests {
             let file = create_file(content);
             let callback = drop;
 
-            let err_callback = |err| {
-                // check error
-                match err {
-                    crate::Error::Mismatch { expected, actual } => {
-                        assert_eq!(expected, bad_size.to_string());
-                        assert_eq!(actual, good_size.to_string());
-                    }
-                    _ => panic!(
-                        "Expected Error::Mismatch for input size `{bad_size}` but got {err:?}"
-                    ),
-                };
-            };
-
-            compute_hash(file.path(), bad_size, callback)
-                .map_err(err_callback)
+            {
+                let err = compute_hash(file.path(), bad_size, callback)
                     .expect_err("compute_hash should report a mismatch");
 
-            check_hash(file.path(), bad_size, Some("foobar"), callback)
-                .map_err(err_callback)
+                // check error
+                assert!(err.is_mismatch(bad_size.to_string(), good_size.to_string()));
+            }
+
+            {
+                let err = check_hash(file.path(), bad_size, Some("foobar"), callback)
                     .expect_err("check_hash should report a mismatch");
+
+                // check error
+                assert!(err.is_mismatch(bad_size.to_string(), good_size.to_string()));
+            }
+        }
+    }
+
+    #[test]
+    fn hash_value_none() {
+        for (content, size) in CASES {
+            let file = create_file(content);
+            let callback = drop;
+
+            let err = check_hash(file.path(), size, None, callback)
+                .expect_err("check_hash should report a mismatch");
+
+            // check error
+            assert!(err.is_mismatch("hash", file.path().display().to_string()));
         }
     }
 
@@ -190,17 +199,11 @@ mod tests {
             let file = create_file(content);
             let callback = drop;
 
-            let err = check_hash(file.path(), size, Some(&bad_hash.to_string()), callback)
+            let err = check_hash(file.path(), size, Some(bad_hash), callback)
                 .expect_err("check_hash should report a mismatch");
 
             // check error
-            match err {
-                crate::Error::Mismatch { expected, actual } => {
-                    assert_eq!(expected, bad_hash);
-                    assert_eq!(actual, good_hash);
-                }
-                _ => panic!("Expected Error::Mismatch but got {err:?}"),
-            }
+            assert!(err.is_mismatch(bad_hash, good_hash));
         }
     }
 }

src/sharry/ids.rs

@@ -185,16 +185,10 @@ mod tests {
         for bad in bad_inputs {
             let err = FileID::try_from(bad.to_string()).expect_err("URL should not parse");
             // make sure it's the Mismatch variant, and that it contains the original input
-            match err {
-                crate::Error::Mismatch { expected, actual } => {
-                    assert_eq!(
-                        expected, "<proto>://<host>/api/v2/alias/upload/<share>/files/tus/<file>",
-                        "Error should output expected format"
-                    );
-                    assert_eq!(actual, bad, "Error should echo back the input");
-                }
-                _ => panic!("Expected Error::Mismatch for input `{bad}` but got {err:?}"),
-            }
+            assert!(err.is_mismatch(
+                "<proto>://<host>/api/v2/alias/upload/<share>/files/tus/<file>",
+                bad
+            ));
         }
     }
 }