support/testing: add lrzsz runtime test

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit dd45ac10d96b9a93be22a13dd3a4ac7973025008)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -1810,6 +1810,7 @@ F:	support/testing/tests/package/test_libjxl.py
 F:	support/testing/tests/package/test_links.py
 F:	support/testing/tests/package/test_links/
 F:	support/testing/tests/package/test_lrzip.py
+F:	support/testing/tests/package/test_lrzsz.py
 F:	support/testing/tests/package/test_ltrace.py
 F:	support/testing/tests/package/test_lvm2.py
 F:	support/testing/tests/package/test_lzip.py

support/testing/tests/package/test_lrzsz.py

@@ -0,0 +1,42 @@
+import os
+
+import infra.basetest
+
+
+class TestLrzsz(infra.basetest.BRTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
+        """
+        BR2_PACKAGE_LRZSZ=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()
+
+        fifo = "/tmp/return-fifo"
+        data_fname = "data"
+        data_path = f"/tmp/{data_fname}"
+
+        # We check a program can execute.
+        self.assertRunOk("sz --version")
+
+        # We create a data file, to be transferred.
+        cmd = f"dd if=/dev/urandom of={data_path} bs=1M count=1"
+        self.assertRunOk(cmd)
+
+        # We create a fifo, used as a return fifo.
+        self.assertRunOk(f"mkfifo {fifo}")
+
+        # We transfer the test data using ZMODEM over the pipe and our
+        # return fifo.
+        self.assertRunOk(f"sz {data_path} < {fifo} | rz > {fifo}")
+
+        # The rz command is supposed to have created the received file
+        # in the current directory. We expect the received data to be
+        # the same as the original input file.
+        self.assertRunOk(f"cmp {data_path} {data_fname}")