support/testing/tests/package/test_lsof.py: new runtime test

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -1719,6 +1719,7 @@ F:	support/testing/tests/package/test_gnupg2.py
 F:	support/testing/tests/package/test_highway.py
 F:	support/testing/tests/package/test_hwloc.py
 F:	support/testing/tests/package/test_libjxl.py
+F:	support/testing/tests/package/test_lsof.py
 F:	support/testing/tests/package/test_ncdu.py
 F:	support/testing/tests/package/test_octave.py
 F:	support/testing/tests/package/test_ola.py

support/testing/tests/package/test_lsof.py

@@ -0,0 +1,41 @@
+import os
+
+import infra.basetest
+
+
+class TestLsof(infra.basetest.BRTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
+        """
+        BR2_PACKAGE_BUSYBOX_SHOW_OTHERS=y
+        BR2_PACKAGE_LSOF=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()
+
+        test_file = "/tmp/this-is-a-test-file"
+
+        # Check the program can execute
+        self.assertRunOk("lsof -v")
+
+        # Check a normal program invocation
+        self.assertRunOk("lsof")
+
+        # Check lsof fails if requested file is not opened
+        _, exit_code = self.emulator.run("lsof {}".format(test_file))
+        self.assertNotEqual(exit_code, 0)
+
+        # Open the test file from the shell on descriptor 10
+        self.assertRunOk("exec 10> {}".format(test_file))
+
+        # Check that lsof now show the file
+        output, exit_code = self.emulator.run("lsof {}".format(test_file))
+        self.assertEqual(exit_code, 0)
+        # output[0] is the lsof header line
+        self.assertIn(test_file, output[1])