micropython: add micropython component

components/language/micropython/tests/basics/generator_pend_throw.py

@@ -0,0 +1,101 @@
+def gen():
+    i = 0
+    while 1:
+        yield i
+        i += 1
+
+g = gen()
+
+try:
+    g.pend_throw
+except AttributeError:
+    print("SKIP")
+    raise SystemExit
+
+
+# Verify that an injected exception will be raised from next().
+print(next(g))
+print(next(g))
+g.pend_throw(ValueError())
+
+v = None
+try:
+    v = next(g)
+except Exception as e:
+    print("raised", repr(e))
+
+print("ret was:", v)
+
+
+# Verify that pend_throw works on an unstarted coroutine.
+g = gen()
+g.pend_throw(OSError())
+try:
+    next(g)
+except Exception as e:
+    print("raised", repr(e))
+
+
+# Verify that you can't resume the coroutine from within the running coroutine.
+def gen_next():
+    next(g)
+    yield 1
+
+g = gen_next()
+
+try:
+    next(g)
+except Exception as e:
+    print("raised", repr(e))
+
+
+# Verify that you can't pend_throw from within the running coroutine.
+def gen_pend_throw():
+    g.pend_throw(ValueError())
+    yield 1
+
+g = gen_pend_throw()
+
+try:
+    next(g)
+except Exception as e:
+    print("raised", repr(e))
+
+
+# Verify that the pend_throw exception can be ignored.
+class CancelledError(Exception):
+    pass
+
+def gen_cancelled():
+    for i in range(5):
+        try:
+            yield i
+        except CancelledError:
+            print('ignore CancelledError')
+
+g = gen_cancelled()
+print(next(g))
+g.pend_throw(CancelledError())
+print(next(g))
+# ...but not if the generator hasn't started.
+g = gen_cancelled()
+g.pend_throw(CancelledError())
+try:
+    next(g)
+except Exception as e:
+    print("raised", repr(e))
+
+
+# Verify that calling pend_throw returns the previous exception.
+g = gen()
+next(g)
+print(repr(g.pend_throw(CancelledError())))
+print(repr(g.pend_throw(OSError)))
+
+
+# Verify that you can pend_throw(None) to cancel a previous pend_throw.
+g = gen()
+next(g)
+g.pend_throw(CancelledError())
+print(repr(g.pend_throw(None)))
+print(next(g))