refactor: another test helper macro

src/ast/mod.rs

@@ -776,14 +776,6 @@ impl ModuleDef {
     }
 }
 
-fn normalize_path(p: PathBuf) -> PathBuf {
-    let mut normalized = PathBuf::new();
-    for segment in p.components() {
-        normalized.push(segment);
-    }
-    return normalized;
-}
-
 /// RangeDef defines a range with optional step.
 #[derive(Debug, PartialEq, Clone)]
 pub struct RangeDef {

src/ast/typecheck/mod.rs

@@ -42,6 +42,10 @@ impl Checker {
         };
     }
 
+    pub fn pop_shape(&mut self) -> Option<Shape> {
+        self.shape_stack.pop()
+    }
+
     pub fn result(mut self) -> Result<BTreeMap<String, Shape>, BuildError> {
         if let Some(err) = self.err_stack.pop() {
             Err(err)

src/ast/typecheck/test.rs

@@ -1,7 +1,7 @@
 use std::convert::Into;
 
 use crate::ast::walk::Walker;
-use crate::ast::Position;
+use crate::ast::{Position, PositionedItem};
 use crate::parse;
 
 use super::*;
@@ -16,33 +16,64 @@ macro_rules! assert_type_fail {
         let err = result.unwrap_err();
         assert_eq!(err.msg, $msg);
         assert_eq!(err.pos.unwrap(), $pos);
-    }}
+    }};
+}
+
+macro_rules! assert_type_success {
+    ($e:expr, $shap:expr) => {{
+        let mut checker = Checker::new();
+        let mut expr = parse($e.into(), None).unwrap();
+        checker.walk_statement_list(expr.iter_mut().collect());
+        let maybe_shape = checker.pop_shape();
+        let result = checker.result();
+        assert!(result.is_ok(), "We expect this to typecheck successfully.");
+        assert!(
+            result.unwrap().is_empty(),
+            "We don't expect a symbol table entry."
+        );
+        assert!(maybe_shape.is_some(), "We got a shape out of it");
+        assert_eq!(maybe_shape.unwrap(), $shap);
+    }};
 }
 
 #[test]
 fn simple_binary_typecheck() {
-    let mut checker = Checker::new();
-    let expr_str = "1 + 1;";
-    let mut expr = parse(expr_str.into(), None).unwrap();
-    checker.walk_statement_list(expr.iter_mut().collect());
-    let result = checker.result();
-    assert!(result.is_ok(), "We expect this to typecheck successfully.");
-    assert!(
-        result.unwrap().is_empty(),
-        "We don't expect a symbol table entry."
+    assert_type_success!(
+        "1 + 1;",
+        Shape::Int(PositionedItem::new(1, Position::new(1, 1, 0)))
     );
 }
 
 // TODO Test that leverages symbol tables and let bindings.
 #[test]
 fn simple_binary_typefail() {
-    assert_type_fail!("1 + true;", "Expected int but got boolean", Position::new(1, 5, 4));
-    assert_type_fail!("1 + \"\";", "Expected int but got str", Position::new(1, 5, 4));
-    assert_type_fail!("1 + [];", "Expected int but got list", Position::new(1, 5, 4));
-    assert_type_fail!("1 + {};", "Expected int but got tuple", Position::new(1, 5, 4));
+    assert_type_fail!(
+        "1 + true;",
+        "Expected int but got boolean",
+        Position::new(1, 5, 4)
+    );
+    assert_type_fail!(
+        "1 + \"\";",
+        "Expected int but got str",
+        Position::new(1, 5, 4)
+    );
+    assert_type_fail!(
+        "1 + [];",
+        "Expected int but got list",
+        Position::new(1, 5, 4)
+    );
+    assert_type_fail!(
+        "1 + {};",
+        "Expected int but got tuple",
+        Position::new(1, 5, 4)
+    );
 }
 
 #[test]
 fn multiple_binary_typefail() {
-    assert_type_fail!("1 + 1 + true;", "Expected int but got boolean", Position::new(1, 9, 8));
+    assert_type_fail!(
+        "1 + 1 + true;",
+        "Expected int but got boolean",
+        Position::new(1, 9, 8)
+    );
 }