variable functions

src/main.rs

@@ -97,7 +97,7 @@ struct Room {
 #[derive(Debug, Eq, PartialEq)]
 struct Variable {
     id: String,
-    initial_value: i64,
+    initial_value: String,
 }
 
 #[derive(Debug, PartialEq)]
@@ -673,6 +673,36 @@ fn test_dialogue_to_string() {
     );
 }
 
+fn variable_from_string(string: String) -> Variable {
+    let id_value: Vec<&str> = string.split('\n').collect();
+    let id = id_value[0].replace("VAR ", "").to_string();
+    let initial_value = id_value[1].to_string();
+
+    Variable { id, initial_value }
+}
+
+#[test]
+fn test_variable_from_string() {
+    assert_eq!(
+        variable_from_string("VAR a\n42".to_string()),
+        Variable { id: "a".to_string(), initial_value: "42".to_string()}
+    );
+}
+
+fn variable_to_string(variable: Variable) -> String {
+    format!("VAR {}\n{}", variable.id, variable.initial_value)
+}
+
+#[test]
+fn test_variable_to_string() {
+    let output = variable_to_string(
+        Variable { id: "c".to_string(), initial_value: "57".to_string() }
+    );
+    let expected = "VAR c\n57".to_string();
+
+    assert_eq!(output, expected);
+}
+
 fn room_from_string(string: String) -> Room {
     // todo handle room_format?
     let mut lines: Vec<&str> = string.split("\n").collect();