feat: add first code snapshot test with insta

crates/aiken-lang/src/tests/parser.rs

@@ -23,6 +23,17 @@ fn assert_definitions(code: &str, definitions: Vec<ast::UntypedDefinition>) {
     )
 }
 
+fn snapshot_test(code: &str) {
+    let (module, _) =
+        parser::module(code, ast::ModuleKind::Validator).expect("Failed to parse code");
+    insta::assert_debug_snapshot!(module);
+}
+
+#[test]
+fn snapshot_windows_newline() {
+    snapshot_test("use aiken/list\r\n")
+}
+
 #[test]
 fn windows_newline() {
     let code = "use aiken/list\r\n";

crates/aiken-lang/src/tests/snapshots/aiken_lang__tests__parser__snapshot_test.snap

@@ -0,0 +1,24 @@
+---
+source: crates/aiken-lang/src/tests/parser.rs
+expression: module
+---
+Module {
+    name: "",
+    docs: [],
+    type_info: (),
+    definitions: [
+        Use(
+            Use {
+                as_name: None,
+                location: 0..14,
+                module: [
+                    "aiken",
+                    "list",
+                ],
+                package: (),
+                unqualified: [],
+            },
+        ),
+    ],
+    kind: Validator,
+}