1 files changed, 23 insertions, 0 deletions
diff --git a/test/test-substrate.cpp b/test/test-substrate.cpp
new file mode 100644
index 0000000..f30918e
--- /dev/null
+++ b/test/test-substrate.cpp
@@ -0,0 +1,23 @@
+#include <substrate.h>
+#include <stdio.h>
+#include <assert.h>
+#include <dlfcn.h>
+#include <time.h>
+
+int main() {
+	const char *foundation = "/System/Library/Frameworks/Foundation.framework/Foundation";
+	dlopen(foundation, RTLD_LAZY);
+
+    MSImageRef im = MSGetImageByName(foundation);
+	assert(im);
+
+	int (*f)(int);
+    MSHookSymbol(f, "_absolute_from_gregorian", im);
+	assert(f(12345) < 0);
+    clock_t a = clock();
+    MSHookSymbol(f, "_absolute_from_gregorian");
+    clock_t b = clock();
+    printf("%ld\n", (long) (b - a));
+	assert(f(12345) < 0);
+}
+