test the hash function

src/hash.rs

@@ -52,3 +52,17 @@ pub fn salt() -> String {
 
 	salt
 }
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+
+	#[test]
+	fn test_hash() {
+		let password = "butterflies";
+		let salt = "cucumbers";
+		let hashed = hash(password, salt).unwrap();
+
+		assert_eq!(hashed, "$argon2i$v=19$m=4096,t=3,p=1$Y3VjdW1iZXJz$r5IYZSVjTOQoW9bGSv3GseB6pcOSEK8btQ8ftJX5wmE");
+	}
+}