1 files changed, 61 insertions, 0 deletions
diff --git a/tests/micropython/schedule.py b/tests/micropython/schedule.py
new file mode 100644
index 000000000..3d584eea4
--- /dev/null
+++ b/tests/micropython/schedule.py
@@ -0,0 +1,61 @@
+# test micropython.schedule() function
+
+import micropython
+
+try:
+    micropython.schedule
+except AttributeError:
+    print('SKIP')
+    import sys
+    sys.exit()
+
+# Basic test of scheduling a function.
+
+def callback(arg):
+    global done
+    print(arg)
+    done = True
+
+done = False
+micropython.schedule(callback, 1)
+while not done:
+    pass
+
+# Test that callbacks can be scheduled from within a callback, but
+# that they don't execute until the outer callback is finished.
+
+def callback_inner(arg):
+    global done
+    print('inner')
+    done += 1
+
+def callback_outer(arg):
+    global done
+    micropython.schedule(callback_inner, 0)
+    # need a loop so that the VM can check for pending events
+    for i in range(2):
+        pass
+    print('outer')
+    done += 1
+
+done = 0
+micropython.schedule(callback_outer, 0)
+while done != 2:
+    pass
+
+# Test that scheduling too many callbacks leads to an exception.  To do this we
+# must schedule from within a callback to guarantee that the scheduler is locked.
+
+def callback(arg):
+    global done
+    try:
+        for i in range(100):
+            micropython.schedule(lambda x:x, None)
+    except RuntimeError:
+        print('RuntimeError')
+    done = True
+
+done = False
+micropython.schedule(callback, None)
+while not done:
+    pass