it: test region creation

src/it/test_macros.rs

@@ -0,0 +1,30 @@
+macro_rules! tassert {
+    ($cond:expr) => {
+        if !$cond {
+            bail!(
+                "Assert `{}` failed ({}:{})",
+                stringify!($cond),
+                file!(),
+                line!()
+            );
+        }
+    };
+}
+
+macro_rules! tassert_eq {
+    ($left:expr, $right:expr) => {{
+        let left = $left;
+        let right = $right;
+        if left != right {
+            bail!(
+                "Assert `{} = {:?} = {:?} = {}` failed ({}:{})",
+                stringify!($left),
+                left,
+                right,
+                stringify!($right),
+                file!(),
+                line!()
+            );
+        }
+    }};
+}