From 2f17a52373ddf27697c2d5ab6a32f8a7349bf7e9 Mon Sep 17 00:00:00 2001
From: Ivan Enderlin <ivan@mnt.io>
Date: Tue, 7 Apr 2020 12:34:30 +0200
Subject: [PATCH] test(interface-types) Update the
 `test_executable_instruction` macro.

It provides a better failure message.
---
 src/macros.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/macros.rs b/src/macros.rs
index 8ff4109..be60ac0 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -111,7 +111,12 @@ macro_rules! test_executable_instruction {
             let mut instance = $instance;
             let run = interpreter.run(&invocation_inputs, &mut instance);
 
-            assert!(run.is_ok());
+            let err = match &run {
+                Ok(_) => "".to_string(),
+                Err(e) => e.to_string(),
+            };
+
+            assert!(run.is_ok(), err);
 
             let stack = run.unwrap();