From d1262390573b758ac4aa610eff96a1b5dcb9f3d6 Mon Sep 17 00:00:00 2001
From: Robin Krahl <robin.krahl@ireas.org>
Date: Mon, 28 Jan 2019 19:45:40 +0000
Subject: Add assert_any_ok macro to unit tests
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Sometimes we cannot use assert_ok! as we can’t compare the Ok value (or
do not want to).  For these cases, this patch adds the new assert_any_ok
macro to use instead of assert!(x.is_ok()).  The advantage is that the
error information is not discarded but printed in a helpful error
message.
---
 tests/util/mod.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'tests/util')

diff --git a/tests/util/mod.rs b/tests/util/mod.rs
index 2bda9ba..bd207a9 100644
--- a/tests/util/mod.rs
+++ b/tests/util/mod.rs
@@ -21,6 +21,21 @@ macro_rules! unwrap_ok {
     }};
 }
 
+#[macro_export]
+macro_rules! assert_any_ok {
+    ($val:expr) => {{
+        match &$val {
+            Ok(_) => {}
+            Err(err) => panic!(
+                r#"assertion failed: `(left == right)`
+  left: `Ok(_)`,
+ right: `Err({:?})`"#,
+                err
+            ),
+        }
+    }};
+}
+
 #[macro_export]
 macro_rules! assert_ok {
     ($left:expr, $right:expr) => {{
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