test: add bthread test

The bthread -v command already returns an appropriate exit code if
threads can't be scheduled. Have it spawn 16 threads and switch between
them for a second and verify that all of these threads were indeed
terminated.

Acked-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20210604084704.17410-14-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 25 insertions, 0 deletions

diff --git a/test/kconfig/full.cfg b/test/kconfig/full.cfg
index e69de29bb2..39275768ea 100644
--- a/test/kconfig/full.cfg
+++ b/test/kconfig/full.cfg
@@ -0,0 +1,2 @@
+CONFIG_BTHREAD=y
+CONFIG_CMD_BTHREAD=y
diff --git a/test/py/test_bthread.py b/test/py/test_bthread.py
new file mode 100644
index 0000000000..6e7b4ba500
--- /dev/null
+++ b/test/py/test_bthread.py
@@ -0,0 +1,23 @@
+import pytest
+from .helper import *
+
+def stale_spawners(barebox):
+    threads = barebox.run_check("bthread -i")
+    if len(threads) == 0:
+        return False
+    return len([t for t in threads if t.startswith('spawner')]) > 0
+
+def test_bthread(barebox, barebox_config):
+    skip_disabled(barebox_config, "CONFIG_CMD_BTHREAD")
+
+    assert not stale_spawners(barebox)
+
+    _, _, returncode = barebox.run('bthread -vvvv')
+    assert returncode == 0
+
+    assert not stale_spawners(barebox)
+
+    switches = int(barebox.run_check("bthread -c")[0].split()[0])
+    yields   = int(barebox.run_check("bthread -t")[0].split()[0])
+
+    assert yields < switches