[PATCH v4 18/32] tests/functional: remove hacky sleep from the tests

[Alex Bennée]

We have proper detection of prompts now so we don't need to guess with
sleep() sprinkled through the test. The extra step of calling halt is
just to flush the final bits of the log (although the last line is
still missed).

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>

---
v2
  - avoid long lines by iterating through an array
  - drop time import
v3
  - fix up on re-base
  - drop stray import os that had sneaked in
---
 tests/functional/test_aarch64_virt.py | 32 +++++++++++++++------------
 1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/tests/functional/test_aarch64_virt.py 
b/tests/functional/test_aarch64_virt.py
index 08576b0694..2d9995a95d 100755
--- a/tests/functional/test_aarch64_virt.py
+++ b/tests/functional/test_aarch64_virt.py
@@ -10,12 +10,12 @@
 #
 # SPDX-License-Identifier: GPL-2.0-or-later
 
-import time
 import logging
 from subprocess import check_call, DEVNULL
 
 from qemu_test import QemuSystemTest, Asset
-from qemu_test import exec_command, wait_for_console_pattern
+from qemu_test import exec_command_and_wait_for_pattern
+from qemu_test import wait_for_console_pattern
 from qemu_test import get_qemu_img
 
 
@@ -107,18 +107,22 @@ def common_aarch64_virt(self, machine):
                          'virtio-blk-device,drive=scratch')
 
         self.vm.launch()
-        self.wait_for_console_pattern('Welcome to Buildroot')
-        time.sleep(0.1)
-        exec_command(self, 'root')
-        time.sleep(0.1)
-        exec_command(self, 'dd if=/dev/hwrng of=/dev/vda bs=512 count=4')
-        time.sleep(0.1)
-        exec_command(self, 'md5sum /dev/vda')
-        time.sleep(0.1)
-        exec_command(self, 'cat /proc/interrupts')
-        time.sleep(0.1)
-        exec_command(self, 'cat /proc/self/maps')
-        time.sleep(0.1)
+
+        ps1='#'
+        self.wait_for_console_pattern('login:')
+
+        commands = [
+            ('root', ps1),
+            ('cat /proc/interrupts', ps1),
+            ('cat /proc/self/maps', ps1),
+            ('uname -a', ps1),
+            ('dd if=/dev/hwrng of=/dev/vda bs=512 count=4', ps1),
+            ('md5sum /dev/vda', ps1),
+            ('halt -n', 'reboot: System halted')
+        ]
+
+        for cmd, pattern in commands:
+            exec_command_and_wait_for_pattern(self, cmd, pattern)
 
     def test_aarch64_virt_gicv3(self):
         self.common_aarch64_virt("virt,gic_version=3")
-- 
2.39.5