test_sleep.py: make sleep time and margin configurable

make the sleep time and the margin configurable.
Signed-off-by: NHeiko Schocher <hs@denx.de>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NStephen Warren <swarren@nvidia.com>

test/py/tests/test_sleep.py

@@ -11,6 +11,12 @@ 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):
@@ -23,13 +29,15 @@ def test_sleep(u_boot_console):
 
     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 = 3
+    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:
-        # 0.25s margin is hopefully enough to account for any system overhead.
-        assert elapsed < (sleep_time + 0.25)
+        # margin is hopefully enough to account for any system overhead.
+        assert elapsed < (sleep_time + sleep_margin)