1 files changed, 46 insertions, 0 deletions
diff --git a/tests/test_parser.rs b/tests/test_parser.rs
new file mode 100644
index 0000000..958fc37
--- /dev/null
+++ b/tests/test_parser.rs
@@ -0,0 +1,46 @@
+use chrysanthemum::ast::*;
+use chrysanthemum::parser::*;
+use chrysanthemum::util::*;
+
+#[test]
+fn test_simple_phrases() {
+    assert_eq!(parse_str("123"), Ok(Const(123, Type::Empty)));
+    assert_eq!(parse_str("x12"), Ok(Var("x12")));
+    assert_eq!(parse_str("x12x2"), Ok(Var("x12x2")));
+    // so i _don't_ want these to be valid identifiers:
+    // but i actually have no idea why my peg is rejecting them lmao
+    assert!(parse_str("12x").is_err());
+    assert!(parse_str("12x23").is_err());
+}
+
+#[test]
+fn test_simple_annotations() {
+    assert_eq!(parse_str("t: int"), Ok(Ann(Var("t"), Type::Integer)));
+    assert_eq!(parse_str("12: nat"), Ok(Ann(Const(12, Type::Empty), Type::Natural)));
+    // assert!(parse_str("t: fake").is_err()); // fixme: currently panics
+}
+
+#[test]
+fn test_simple_expressions() {
+    assert_eq!(parse_str("λx.y"), Ok(Abs("x", Var("y"))));
+    assert_eq!(parse_str("λ x.y"), Ok(Abs("x", Var("y"))));
+    assert_eq!(parse_str("λx.y"), Ok(Abs("x", Var("y"))));
+    assert_eq!(parse_str("lambda x . y"), Ok(Abs("x", Var("y"))));
+    assert!(parse_str("(λx.y)").is_err()); // fixme: should be fine
+    assert_eq!(parse_str("(λx.y) x"), Ok(App(Abs("x", Var("y")), Var("x"))));
+    assert_eq!(parse_str("(λx.y) x"), Ok(App(Abs("x", Var("y")), Var("x"))));
+    assert_eq!(parse_str("if x then y else z"), Ok(Cond(Var("x"), Var("y"), Var("z"))));
+    assert_eq!(parse_str("if xeme then yak else zebra"), Ok(Cond(Var("xeme"), Var("yak"), Var("zebra"))));
+    assert_eq!(parse_str("if 413 then 612 else 1025"), Ok(Cond(Const(413, Type::Empty), Const(612, Type::Empty), Const(1025, Type::Empty)))); // invalid, but should parse
+}
+
+#[test]
+fn test_complex_expressions() {
+    assert_eq!(parse_str("(λy.if y then 0 else 1) z"), Ok(App(Abs("y", Cond(Var("y"), Const(0, Type::Empty), Const(1, Type::Empty))), Var("z"))));
+}
+
+#[test]
+fn test_file() {
+
+}
+