Handle exceptions (#54)

* Add support for wrapper types

* Move `FilesWithExtensionIterator` to `core::common`

* Remove unneeded use of two `HashMap`s

* Make metadata structs more typed

* Impl new_from for wrapper types

* Implement the new input handling logic

* Fix edge-case in input handling

* Ignore macro doc comment tests

* Correct comment

* Fix edge-case in deployment order

* Handle calldata better

* Allow for the use of function signatures

* Add support for exceptions

* Cached nonce allocator

* Fix tests

* Add support for address replacement

* Cleanup implementation

* Cleanup mutability

* Wire up address replacement with rest of code

* Implement caller replacement

* Switch to callframe trace for exceptions

* Add a way to skip tests if they don't match the target

* Handle values from the metadata files

* Remove address replacement

* Correct the arguments

* Remove empty impl

* Remove address replacement

* Correct the arguments

* Remove empty impl

* Fix size_requirement underflow

* Add support for wildcards in exceptions

* Fix calldata construction of single calldata

* Better handling for length in equivalency checks

* Make initial balance a constant

* Fix size_requirement underflow

* Add support for wildcards in exceptions

* Fix calldata construction of single calldata

* Better handling for length in equivalency checks

* Fix tests

crates/format/src/case.rs

@@ -1,6 +1,10 @@
 use serde::Deserialize;
 
-use crate::{define_wrapper_type, input::Input, mode::Mode};
+use crate::{
+    define_wrapper_type,
+    input::{Expected, Input},
+    mode::Mode,
+};
 
 #[derive(Debug, Default, Deserialize, Clone, Eq, PartialEq)]
 pub struct Case {
@@ -9,6 +13,33 @@ pub struct Case {
     pub modes: Option<Vec<Mode>>,
     pub inputs: Vec<Input>,
     pub group: Option<String>,
+    pub expected: Option<Expected>,
+}
+
+impl Case {
+    pub fn inputs_iterator(&self) -> impl Iterator<Item = Input> {
+        let inputs_len = self.inputs.len();
+        self.inputs
+            .clone()
+            .into_iter()
+            .enumerate()
+            .map(move |(idx, mut input)| {
+                if idx + 1 == inputs_len {
+                    if input.expected.is_none() {
+                        input.expected = self.expected.clone();
+                    }
+
+                    // TODO: What does it mean for us to have an `expected` field on the case itself
+                    // but the final input also has an expected field that doesn't match the one on
+                    // the case? What are we supposed to do with that final expected field on the
+                    // case?
+
+                    input
+                } else {
+                    input
+                }
+            })
+    }
 }
 
 define_wrapper_type!(