1 files changed, 48 insertions, 0 deletions
diff --git a/tests/util/ftruncate.c b/tests/util/ftruncate.c
new file mode 100644
index 000000000..e60e5d96d
--- /dev/null
+++ b/tests/util/ftruncate.c
@@ -0,0 +1,48 @@
+/**
+ * Some tests for p_ftruncate() to ensure that
+ * properly handles large (2Gb+) files.
+ */
+
+#include "clar_libgit2.h"
+
+static const char *filename = "core_ftruncate.txt";
+static int fd = -1;
+
+void test_ftruncate__initialize(void)
+{
+	if (!cl_is_env_set("GITTEST_INVASIVE_FS_SIZE"))
+		cl_skip();
+
+	cl_must_pass((fd = p_open(filename, O_CREAT | O_RDWR, 0644)));
+}
+
+void test_ftruncate__cleanup(void)
+{
+	if (fd < 0)
+		return;
+
+	p_close(fd);
+	fd = 0;
+
+	p_unlink(filename);
+}
+
+static void _extend(off64_t i64len)
+{
+	struct stat st;
+	int error;
+
+	cl_assert((error = p_ftruncate(fd, i64len)) == 0);
+	cl_assert((error = p_fstat(fd, &st)) == 0);
+	cl_assert(st.st_size == i64len);
+}
+
+void test_ftruncate__2gb(void)
+{
+	_extend(0x80000001);
+}
+
+void test_ftruncate__4gb(void)
+{
+	_extend(0x100000001);
+}