support/testing: add ngrep runtime test

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

support/testing/tests/package/test_ngrep.py

@@ -0,0 +1,49 @@
+import os
+import time
+
+import infra.basetest
+
+
+class TestNgrep(infra.basetest.BRTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
+        """
+        BR2_PACKAGE_BUSYBOX_SHOW_OTHERS=y
+        BR2_PACKAGE_NETCAT=y
+        BR2_PACKAGE_NGREP=y
+        BR2_TARGET_ROOTFS_CPIO=y
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def test_run(self):
+        cpio_file = os.path.join(self.builddir, "images", "rootfs.cpio")
+        self.emulator.boot(arch="armv5",
+                           kernel="builtin",
+                           options=["-initrd", cpio_file])
+        self.emulator.login()
+
+        port = 12345
+        msg = 'Hello Buildroot'
+
+        # Check the program can execute.
+        self.assertRunOk("ngrep -V")
+
+        # Start a netcat server in background accepting connections
+        cmd = f"nc -l -p {port} >/dev/null </dev/null &"
+        self.assertRunOk(cmd)
+
+        time.sleep(1)
+
+        # Start a netcat client in background, sending one message
+        # every seconds
+        cmd = "( while true ; do "
+        cmd += f"echo '{msg}'; "
+        cmd += "sleep 1 ; "
+        cmd += "done) | "
+        cmd += f"nc 127.0.0.1 {port} &"
+        self.assertRunOk(cmd)
+
+        time.sleep(1)
+
+        # Capture 3 packets with the message.
+        cmd = f"ngrep -n 3 '{msg}'"
+        self.assertRunOk(cmd)