equation rebalancing

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/modelica_ast.rs b/tests/modelica_ast.rs
index b6233f3..d39615e 100644
--- a/tests/modelica_ast.rs
+++ b/tests/modelica_ast.rs
@@ -54,3 +54,25 @@ fn test_eqn_identifiers() {
                 Box::new(Ident("z".to_string()))),
         }.identifiers()));
 }
+
+#[test]
+fn test_rebalance_for() {
+    use modelthing::modelica_ast::Expr::*;
+
+    // z = a - 1.2345
+    // a = z + 1.2345
+    let done = SimpleEquation{
+        lhs: Ident("z".to_string()),
+        rhs: BinExpr(BinOperator::Subtract,
+            Box::new(Ident("a".to_string())),
+            Box::new(Float(1.2345)))};
+    assert_eq!(done,
+        done.rebalance_for("z".to_string()).unwrap());
+    assert_eq!(SimpleEquation{
+        lhs: Ident("a".to_string()),
+        rhs: BinExpr(BinOperator::Add,
+            Box::new(Ident("z".to_string())),
+            Box::new(Float(1.2345)))},
+        done.rebalance_for("a".to_string()).unwrap());
+
+}