Add assert_set_eq macro to make test clearer

Co-authored-by: Max Brunsfeld <max@zed.dev>

crates/util/src/test/assertions.rs

@@ -0,0 +1,19 @@
+#[macro_export]
+macro_rules! assert_set_eq {
+    ($left:expr,$right:expr) => {{
+        let left = $left;
+        let right = $right;
+
+        for left_value in left.iter() {
+            if !right.contains(left_value) {
+                panic!("assertion failed: `(left == right)`\n left: {:?}\nright: {:?}\nright does not contain {:?}", left, right, left_value);
+            }
+        }
+
+        for right_value in right.iter() {
+            if !left.contains(right_value) {
+                panic!("assertion failed: `(left == right)`\n left: {:?}\nright: {:?}\nleft does not contain {:?}", left, right, right_value);
+            }
+        }
+    }};
+}