Add some basic sanity tests for feature flags

diff --git a/lightning/src/ln/features.rs b/lightning/src/ln/features.rs
index d7e0299e8876143b09a2052d6380c842a257b827..b87501eb04ccfdd862b47b080c5395566fb8f0fd 100644 (file)
--- a/lightning/src/ln/features.rs
+++ b/lightning/src/ln/features.rs
@@ -284,3 +284,38 @@ impl<R: ::std::io::Read, T: sealed::Context> Readable<R> for Features<T> {
                })
        }
 }
+
+#[cfg(test)]
+mod tests {
+       use super::{ChannelFeatures, InitFeatures, NodeFeatures};
+
+       #[test]
+       fn sanity_test_our_features() {
+               assert!(!ChannelFeatures::supported().requires_unknown_bits());
+               assert!(!ChannelFeatures::supported().supports_unknown_bits());
+               assert!(!InitFeatures::supported().requires_unknown_bits());
+               assert!(!InitFeatures::supported().supports_unknown_bits());
+               assert!(!NodeFeatures::supported().requires_unknown_bits());
+               assert!(!NodeFeatures::supported().supports_unknown_bits());
+
+               assert!(InitFeatures::supported().supports_upfront_shutdown_script());
+               assert!(NodeFeatures::supported().supports_upfront_shutdown_script());
+
+               assert!(InitFeatures::supported().supports_data_loss_protect());
+               assert!(NodeFeatures::supported().supports_data_loss_protect());
+
+               let mut init_features = InitFeatures::supported();
+               init_features.set_initial_routing_sync();
+               assert!(!init_features.requires_unknown_bits());
+               assert!(!init_features.supports_unknown_bits());
+       }
+
+       #[test]
+       fn sanity_test_unkown_bits_testing() {
+               let mut features = ChannelFeatures::supported();
+               features.set_require_unknown_bits();
+               assert!(features.requires_unknown_bits());
+               features.clear_require_unknown_bits();
+               assert!(!features.requires_unknown_bits());
+       }
+}