add test case for checking file append

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/fs/test_append.c b/tests/fs/test_append.c
new file mode 100644
index 00000000..27909ba3
--- /dev/null
+++ b/tests/fs/test_append.c
@@ -0,0 +1,24 @@
+#include<assert.h>
+#include<stdio.h>
+
+int main (int argc, char *argv[])
+{
+   FILE *fp;
+   int res;
+   long len;
+
+   fp = fopen("testappend", "wb+");
+   res = fwrite("1234567890", 10, 1, fp);
+   fclose(fp);
+
+   fp = fopen("testappend", "ab+");
+   res = fwrite("1234567890", 10, 1, fp);
+
+   fseek(fp, -7, SEEK_END);
+   len = ftell(fp);
+   assert(len == 13);
+   fclose(fp);
+
+   puts("success");
+   return 0;
+}