1 files changed, 56 insertions, 0 deletions
diff --git a/modelica-parser-lalrpop/tests/ast.rs b/modelica-parser-lalrpop/tests/ast.rs
new file mode 100644
index 0000000..f9047cb
--- /dev/null
+++ b/modelica-parser-lalrpop/tests/ast.rs
@@ -0,0 +1,56 @@
+
+extern crate modelica_parser;
+
+use std::collections::HashSet;
+use std::iter::FromIterator;
+use modelica_parser::ast::*;
+
+fn set_eq(a: Vec<String>, b: Vec<String>) -> bool {
+    let set_a: HashSet<String> = HashSet::from_iter(a);
+    let set_b: HashSet<String> = HashSet::from_iter(b);
+    return set_a == set_b;
+}
+
+#[test]
+fn test_expr_identifiers() {
+    use modelica_parser::ast::Expr::*;
+
+    assert!(set_eq(
+        vec![],
+        Integer(0).identifiers()));
+    assert!(set_eq(
+        vec!["x".to_string()],
+        Ident("x".to_string()).identifiers()));
+    assert!(set_eq(
+        vec!["x".to_string(), "y".to_string(), "z".to_string()],
+        BinExpr(BinOperator::Add,
+            Box::new(Abs(Box::new(Ident("z".to_string())))),
+            Box::new(BinExpr(BinOperator::Add,
+                Box::new(Abs(Box::new(Ident("x".to_string())))),
+                Box::new(Abs(Box::new(Ident("y".to_string()))))))).identifiers()));
+    assert!(set_eq(
+        vec!["z".to_string()],
+        BinExpr(BinOperator::Add,
+            Box::new(Ident("z".to_string())),
+            Box::new(Ident("z".to_string()))).identifiers()));
+}
+
+#[test]
+fn test_eqn_identifiers() {
+    use modelica_parser::ast::Expr::*;
+
+    assert!(set_eq(
+        vec![],
+        SimpleEquation{
+            lhs: Integer(0),
+            rhs: Integer(0),
+        }.identifiers()));
+    assert!(set_eq(
+        vec!["z".to_string()],
+        SimpleEquation{
+            lhs: Ident("z".to_string()),
+            rhs: BinExpr(BinOperator::Add,
+                Box::new(Ident("z".to_string())),
+                Box::new(Ident("z".to_string()))),
+        }.identifiers()));
+}