1import os
2
3import infra.basetest
4
5
6class TestScreen(infra.basetest.BRTest):
7    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
8        """
9        BR2_PACKAGE_SCREEN=y
10        BR2_TARGET_ROOTFS_CPIO=y
11        # BR2_TARGET_ROOTFS_TAR is not set
12        """
13
14    def test_run(self):
15        cpio_file = os.path.join(self.builddir, "images", "rootfs.cpio")
16        self.emulator.boot(arch="armv5",
17                           kernel="builtin",
18                           options=["-initrd", cpio_file])
19        self.emulator.login()
20
21        session_name = "BuildrootSession"
22        message = "HelloBuildroot"
23        screen_dump = "screen.dump.txt"
24
25        # Check the program can execute
26        self.assertRunOk("screen --version")
27
28        # There is no "screen" running yet. Listing sessions is
29        # expected to fail.
30        _, exit_code = self.emulator.run("screen -ls")
31        self.assertNotEqual(exit_code, 0)
32
33        # We now start a detached and named session.
34        self.assertRunOk(f"screen -dmS {session_name}")
35
36        # Since we are supposed to have a running session, it should
37        # appear in the list.
38        output, exit_code = self.emulator.run("screen -ls")
39        self.assertEqual(exit_code, 0)
40        self.assertIn(session_name, "\n".join(output))
41
42        # We send an exec command to print a message in the "screen"
43        # display running in background.
44        cmd = f"screen -S {session_name} -X exec printf {message}"
45        self.assertRunOk(cmd)
46
47        # We request a hardcopy of this "screen" display.
48        cmd = f"screen -S {session_name} -X hardcopy {screen_dump}"
49        self.assertRunOk(cmd)
50
51        # The dump file is supposed to contain our message.
52        self.assertRunOk(f"grep -Fo '{message}' {screen_dump}")
53
54        # We request "screen" to quit...
55        cmd = f"screen -S {session_name} -X quit"
56        self.assertRunOk(cmd)
57
58        # Since the session is supposed to be terminated, listing
59        # sessions is expected to fail (again).
60        _, exit_code = self.emulator.run("screen -ls")
61        self.assertNotEqual(exit_code, 0)
62