5 files changed, 60 insertions, 0 deletions

diff --git a/tests/Makefile b/tests/Makefile
index 5dc4390..9a65cf3 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -62,6 +62,10 @@ TARGETS= \
         test_recvfrom                \
         test_send                    \
         test_sendto                  \
+        test_FD_CLR_negative         \
+        test_FD_CLR_SETSIZE          \
+        test_FD_SET_negative         \
+        test_FD_SET_SETSIZE          \
 
 .SILENT:
 
diff --git a/tests/test_FD_CLR_SETSIZE.c b/tests/test_FD_CLR_SETSIZE.c
new file mode 100644
index 0000000..cd571f1
--- /dev/null
+++ b/tests/test_FD_CLR_SETSIZE.c
@@ -0,0 +1,14 @@
+#include "common.h"
+
+#include <sys/select.h>
+
+int main(int argc, char** argv) {
+  fd_set rfds;
+
+  CHK_FAIL_START
+  FD_CLR(FD_SETSIZE, &rfds);
+  CHK_FAIL_END
+
+  puts((const char*)&rfds);
+  return ret;
+}
diff --git a/tests/test_FD_CLR_negative.c b/tests/test_FD_CLR_negative.c
new file mode 100644
index 0000000..43b5e42
--- /dev/null
+++ b/tests/test_FD_CLR_negative.c
@@ -0,0 +1,14 @@
+#include "common.h"
+
+#include <sys/select.h>
+
+int main(int argc, char** argv) {
+  fd_set rfds;
+
+  CHK_FAIL_START
+  FD_CLR(-1, &rfds);
+  CHK_FAIL_END
+
+  puts((const char*)&rfds);
+  return ret;
+}
diff --git a/tests/test_FD_SET_SETSIZE.c b/tests/test_FD_SET_SETSIZE.c
new file mode 100644
index 0000000..87e197e
--- /dev/null
+++ b/tests/test_FD_SET_SETSIZE.c
@@ -0,0 +1,14 @@
+#include "common.h"
+
+#include <sys/select.h>
+
+int main(int argc, char** argv) {
+  fd_set rfds;
+
+  CHK_FAIL_START
+  FD_SET(FD_SETSIZE, &rfds);
+  CHK_FAIL_END
+
+  puts((const char*)&rfds);
+  return ret;
+}
diff --git a/tests/test_FD_SET_negative.c b/tests/test_FD_SET_negative.c
new file mode 100644
index 0000000..df0aa0c
--- /dev/null
+++ b/tests/test_FD_SET_negative.c
@@ -0,0 +1,14 @@
+#include "common.h"
+
+#include <sys/select.h>
+
+int main(int argc, char** argv) {
+  fd_set rfds;
+
+  CHK_FAIL_START
+  FD_SET(-1, &rfds);
+  CHK_FAIL_END
+
+  puts((const char*)&rfds);
+  return ret;
+}