add initial Path unit tests

test/src/test_Path.cc

@@ -0,0 +1,10 @@
+#include "gtest/gtest.h"
+#include "jes/Path.h"
+
+using namespace jes;
+
+TEST(PathTest, construct_from_const_char_ptr)
+{
+    Path p("/a/b/c");
+    EXPECT_EQ("/a/b/c", p.to_s());
+}