Update test

tests/test_examples.rs

@@ -0,0 +1,47 @@
+use std::path::Path;
+
+use lang_c::ast::*;
+
+use kecc::run_ir::*;
+use kecc::*;
+
+fn test_dir<F>(path: &Path, f: F)
+where
+    F: Fn(&TranslationUnit),
+{
+    let mut parse = Parse::default();
+    let dir = path.read_dir().expect("read_dir call failed");
+    for entry in dir {
+        let entry = ok_or!(entry, continue);
+        let path = entry.path();
+        if path.is_dir() {
+            continue;
+        }
+
+        println!("[testing {:?}]", path);
+        let test_unit = parse.translate(&path.as_path()).expect(
+            &format!("parse failed {:?}", path.into_os_string().to_str().unwrap()).to_owned(),
+        );
+        f(&test_unit);
+    }
+}
+
+#[test]
+fn test_examples_write_c() {
+    test_dir(Path::new("examples/"), write_c_test);
+    test_dir(Path::new("examples/hw1"), write_c_test);
+}
+
+#[test]
+fn test_examples_irgen() {
+    test_dir(Path::new("examples/"), |test_unit| {
+        let ir = Irgen::default()
+            .translate(test_unit)
+            .expect("failed to generate ir");
+
+        // TODO: insert randomly generated command line arguments
+        let args = Vec::new();
+
+        assert_eq!(run_ir(&ir, args), Ok(Value::Int(1)));
+    });
+}