Add back another test revealing a scope error

TODO.md

@@ -2,6 +2,8 @@
 
 ## Symbols
 
+* Add some good printf-debugging impls for SymbolTable-related items
+
 * the symbol table should probably *only* be for global definitions (maybe rename it to reflect this?)
 * dealing with variable lookup w/in functions/closures should probably happen in AST -> ReducedAST
     * b/c that's where we go from a string name to a canonical ID (for e.g. 2nd param in 3rd enclosing scope)

schala-lang/language/src/tree_walk_eval/test.rs

@@ -62,3 +62,27 @@ fn scopes() {
     eval_assert(scope_ok, "20");
 }
 
+
+#[test]
+fn basic_lambda_evaluation_1() {
+    let source = r#"
+let q = \(x, y) { x * y }
+let x = q(5, 2)
+let y = \(m, n, o) { m + n + o }(1,2,3)
+(x, y)
+"#;
+
+eval_assert(source, r"(10, 6)");
+}
+
+#[test]
+fn basic_lambda_evaluation_2() {
+  let source = r#"
+fn milta() {
+  \(x) { x + 33 }
+}
+milta()(10)
+  "#;
+
+  eval_assert(source, "43");
+  }