Add tests for key_algorithm parsing

ruma-identifiers-validation/src/key_algorithms.rs

@@ -1,5 +1,7 @@
 //! Key algorithms used in Matrix spec.
 
+use std::convert::TryFrom;
+
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 
@@ -21,6 +23,22 @@ pub enum DeviceKeyAlgorithm {
     SignedCurve25519,
 }
 
+impl TryFrom<&'_ str> for DeviceKeyAlgorithm {
+    type Error = strum::ParseError;
+
+    fn try_from(value: &str) -> Result<Self, Self::Error> {
+        value.parse()
+    }
+}
+
+impl TryFrom<String> for DeviceKeyAlgorithm {
+    type Error = strum::ParseError;
+
+    fn try_from(value: String) -> Result<Self, Self::Error> {
+        value.parse()
+    }
+}
+
 /// The server key algorithms defined in the Matrix spec.
 #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, AsRefStr, Display, EnumString)]
 #[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
@@ -30,3 +48,36 @@ pub enum ServerKeyAlgorithm {
     /// The Ed25519 signature algorithm.
     Ed25519,
 }
+
+impl TryFrom<&'_ str> for ServerKeyAlgorithm {
+    type Error = strum::ParseError;
+
+    fn try_from(value: &str) -> Result<Self, Self::Error> {
+        value.parse()
+    }
+}
+
+impl TryFrom<String> for ServerKeyAlgorithm {
+    type Error = strum::ParseError;
+
+    fn try_from(value: String) -> Result<Self, Self::Error> {
+        value.parse()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{DeviceKeyAlgorithm, ServerKeyAlgorithm};
+
+    #[test]
+    fn parse_device_key_algorithm() {
+        assert_eq!("ed25519".parse(), Ok(DeviceKeyAlgorithm::Ed25519));
+        assert_eq!("curve25519".parse(), Ok(DeviceKeyAlgorithm::Curve25519));
+        assert_eq!("signed_curve25519".parse(), Ok(DeviceKeyAlgorithm::SignedCurve25519));
+    }
+
+    #[test]
+    fn parse_server_key_algorithm() {
+        assert_eq!("ed25519".parse(), Ok(ServerKeyAlgorithm::Ed25519));
+    }
+}