From 29710d9970b784d0ee3fadd3ba0c7a84c9761451 Mon Sep 17 00:00:00 2001
From: "Jan Alexander Steffens (heftig)" <jsteffens@make.tv>
Date: Tue, 24 Sep 2019 11:34:08 +0200
Subject: [PATCH] gstreamer: Assert that FromValueOptional works as expected

Fails without the preceding patch.
---
 gstreamer/src/caps_features.rs | 15 +++++++++++++++
 gstreamer/src/structure.rs     | 10 ++++++++++
 2 files changed, 25 insertions(+)

diff --git a/gstreamer/src/caps_features.rs b/gstreamer/src/caps_features.rs
index 79252ff99..77da06871 100644
--- a/gstreamer/src/caps_features.rs
+++ b/gstreamer/src/caps_features.rs
@@ -474,3 +474,18 @@ lazy_static! {
     pub static ref CAPS_FEATURES_MEMORY_SYSTEM_MEMORY: CapsFeatures =
         CapsFeatures::new(&[*CAPS_FEATURE_MEMORY_SYSTEM_MEMORY]);
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_from_value_optional() {
+        ::init().unwrap();
+
+        let a = glib::value::Value::from(None::<&CapsFeatures>);
+        assert!(a.get::<CapsFeatures>().unwrap().is_none());
+        let b = glib::value::Value::from(&CapsFeatures::new_empty());
+        assert!(b.get::<CapsFeatures>().unwrap().is_some());
+    }
+}
diff --git a/gstreamer/src/structure.rs b/gstreamer/src/structure.rs
index 3ff981acb..c435e5077 100644
--- a/gstreamer/src/structure.rs
+++ b/gstreamer/src/structure.rs
@@ -837,4 +837,14 @@ mod tests {
 
         assert_eq!(a, s.to_string());
     }
+
+    #[test]
+    fn test_from_value_optional() {
+        ::init().unwrap();
+
+        let a = glib::value::Value::from(None::<&Structure>);
+        assert!(a.get::<Structure>().unwrap().is_none());
+        let b = glib::value::Value::from(&Structure::from_string(&"foo").unwrap());
+        assert!(b.get::<Structure>().unwrap().is_some());
+    }
 }