ci: fix name of directory and add test script

.circleci/config.yml

@@ -7,7 +7,7 @@ jobs:
     steps:
       - checkout
       - run: g++ --version
-      - run: cd test/
+      - run: cd tests/
       - run: g++ -std=c++11 -O2 -Wall -Wextra -Werror check.cpp -o check
       - run: git clone https://github.com/BurntSushi/toml-test.git
       - run: cp check toml-test/tests/invalid

tests/check.cpp

@@ -0,0 +1,41 @@
+#include "toml.hpp"
+#include <iostream>
+#include <iomanip>
+
+int main(int argc, char **argv)
+{
+    if(argc != 3)
+    {
+        std::cerr << "usage: ./check [filename] [valid|invalid]" << std::endl;
+        return 1;
+    }
+
+    const std::string file_kind(argv[2]);
+
+    try
+    {
+        const auto data = toml::parse(argv[1]);
+        std::cout << std::setprecision(16) << std::setw(80) << data;
+        if(file_kind == "valid")
+        {
+            return 0;
+        }
+        else
+        {
+            return 1;
+        }
+    }
+    catch(const toml::syntax_error& err)
+    {
+        std::cout << "what(): " << err.what() << std::endl;
+        if(file_kind == "invalid")
+        {
+            return 0;
+        }
+        else
+        {
+            return 1;
+        }
+    }
+    return 127;
+}