From 236332f9bfd9cb0688815142237f299939b2d80a Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Fri, 20 Feb 2026 21:03:57 +0900
Subject: feat: add parsing tests

---
 .gitmodules              |  3 ++
 src/lib.rs               |  3 ++
 tests/JSONTestSuite      |  1 +
 tests/json_test_suite.rs | 71 ++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 78 insertions(+)
 create mode 100644 .gitmodules
 create mode 160000 tests/JSONTestSuite
 create mode 100644 tests/json_test_suite.rs

diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..b8ec319
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "tests/JSONTestSuite"]
+	path = tests/JSONTestSuite
+	url = https://github.com/nst/JSONTestSuite
diff --git a/src/lib.rs b/src/lib.rs
index 5d80297..3143032 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -3,11 +3,13 @@ use std::iter::Peekable;
 
 pub type RepairResult = Result<RepairOk, RepairErr>;
 
+#[derive(Debug)]
 pub enum RepairOk {
     Valid,
     Repaired,
 }
 
+#[derive(Debug)]
 pub enum RepairErr {
     Invalid(SyntaxError),
     IoErr(std::io::Error),
@@ -25,6 +27,7 @@ impl From<SyntaxError> for RepairErr {
     }
 }
 
+#[derive(Debug)]
 pub enum SyntaxError {
     UnexpectedEof,
     InvalidValue,
diff --git a/tests/JSONTestSuite b/tests/JSONTestSuite
new file mode 160000
index 0000000..1ef36fa
--- /dev/null
+++ b/tests/JSONTestSuite
@@ -0,0 +1 @@
+Subproject commit 1ef36fa01286573e846ac449e8683f8833c5b26a
diff --git a/tests/json_test_suite.rs b/tests/json_test_suite.rs
new file mode 100644
index 0000000..7bb67f4
--- /dev/null
+++ b/tests/json_test_suite.rs
@@ -0,0 +1,71 @@
+#[test]
+fn y_json_files_should_be_valid() {
+    let test_suite_dir: std::path::PathBuf = [
+        env!("CARGO_MANIFEST_DIR"),
+        "tests",
+        "JSONTestSuite",
+        "test_parsing",
+    ]
+    .iter()
+    .collect();
+
+    for entry in std::fs::read_dir(&test_suite_dir).expect("failed to read test suite directory") {
+        let entry = entry.expect("failed to read directory entry");
+        let path = entry.path();
+        let name = path.file_name().unwrap().to_string_lossy();
+        if !name.starts_with("y_") || !name.ends_with(".json") {
+            continue;
+        }
+
+        let input = std::fs::read(&path).expect("failed to read file");
+        let mut output = Vec::new();
+        let result = reparojson::repair(&input[..], &mut output);
+
+        assert!(
+            matches!(result, Ok(reparojson::RepairOk::Valid)),
+            "{}: expected valid JSON, but {:?}",
+            name,
+            result
+        );
+        assert_eq!(input, output, "{name}: output differs from input");
+    }
+}
+
+#[test]
+fn n_json_files_should_be_invalid() {
+    let test_suite_dir: std::path::PathBuf = [
+        env!("CARGO_MANIFEST_DIR"),
+        "tests",
+        "JSONTestSuite",
+        "test_parsing",
+    ]
+    .iter()
+    .collect();
+
+    for entry in std::fs::read_dir(&test_suite_dir).expect("failed to read test suite directory") {
+        let entry = entry.expect("failed to read directory entry");
+        let path = entry.path();
+        let name = path.file_name().unwrap().to_string_lossy();
+        if !name.starts_with("n_") || !name.ends_with(".json") {
+            continue;
+        }
+
+        // Skip test cases that cause stack overflow.
+        if *name == *"n_structure_100000_opening_arrays.json"
+            || *name == *"n_structure_open_array_object.json"
+        {
+            continue;
+        }
+
+        let input = std::fs::read(&path).expect("failed to read file");
+        let mut output = Vec::new();
+        let result = reparojson::repair(&input[..], &mut output);
+
+        assert!(
+            !matches!(result, Ok(reparojson::RepairOk::Valid)),
+            "{}: expected invalid JSON, but {:?}",
+            name,
+            result
+        );
+    }
+}
-- 
cgit v1.3-1-g0d28