1 files changed, 43 insertions, 0 deletions
diff --git a/roms/u-boot/test/py/tests/test_sleep.py b/roms/u-boot/test/py/tests/test_sleep.py
new file mode 100644
index 000000000..392af29db
--- /dev/null
+++ b/roms/u-boot/test/py/tests/test_sleep.py
@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
+
+import pytest
+import time
+
+"""
+Note: This test doesn't rely on boardenv_* configuration values but they can
+change test behavior.
+
+# Setup env__sleep_accurate to False if time is not accurate on your platform
+env__sleep_accurate = False
+
+# Setup env__sleep_time time in seconds board is set to sleep
+env__sleep_time = 3
+
+# Setup env__sleep_margin set a margin for any system overhead
+env__sleep_margin = 0.25
+
+"""
+
+def test_sleep(u_boot_console):
+    """Test the sleep command, and validate that it sleeps for approximately
+    the correct amount of time."""
+
+    sleep_skip = u_boot_console.config.env.get('env__sleep_accurate', True)
+    if not sleep_skip:
+        pytest.skip('sleep is not accurate')
+
+    if u_boot_console.config.buildconfig.get('config_cmd_misc', 'n') != 'y':
+        pytest.skip('sleep command not supported')
+
+    # 3s isn't too long, but is enough to cross a few second boundaries.
+    sleep_time = u_boot_console.config.env.get('env__sleep_time', 3)
+    sleep_margin = u_boot_console.config.env.get('env__sleep_margin', 0.25)
+    tstart = time.time()
+    u_boot_console.run_command('sleep %d' % sleep_time)
+    tend = time.time()
+    elapsed = tend - tstart
+    assert elapsed >= (sleep_time - 0.01)
+    if not u_boot_console.config.gdbserver:
+        # margin is hopefully enough to account for any system overhead.
+        assert elapsed < (sleep_time + sleep_margin)