micropython: add micropython component

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

@@ -0,0 +1,123 @@
+def gen():
+    yield 1
+    yield 2
+    yield 3
+    yield 4
+
+def gen2():
+    yield -1
+    print((yield from gen()))
+    yield 10
+    yield 11
+
+g = gen2()
+print(next(g))
+print(next(g))
+g.close()
+try:
+    print(next(g))
+except StopIteration:
+    print("StopIteration")
+
+
+# Now variation of same test, but with leaf generator
+# swallowing GeneratorExit exception - its upstream gen
+# generator should still receive one.
+def gen3():
+    yield 1
+    try:
+        yield 2
+    except GeneratorExit:
+        print("leaf caught GeneratorExit and swallowed it")
+        return
+    yield 3
+    yield 4
+
+def gen4():
+    yield -1
+    try:
+        print((yield from gen3()))
+    except GeneratorExit:
+        print("delegating caught GeneratorExit")
+        raise
+    yield 10
+    yield 11
+
+g = gen4()
+print(next(g))
+print(next(g))
+print(next(g))
+g.close()
+try:
+    print(next(g))
+except StopIteration:
+    print("StopIteration")
+
+
+# Yet another variation - leaf generator gets GeneratorExit,
+# and reraises a new GeneratorExit. This still should close chain properly.
+def gen5():
+    yield 1
+    try:
+        yield 2
+    except GeneratorExit:
+        print("leaf caught GeneratorExit and reraised GeneratorExit")
+        raise GeneratorExit(123)
+    yield 3
+    yield 4
+
+def gen6():
+    yield -1
+    try:
+        print((yield from gen5()))
+    except GeneratorExit:
+        print("delegating caught GeneratorExit")
+        raise
+    yield 10
+    yield 11
+
+g = gen6()
+print(next(g))
+print(next(g))
+print(next(g))
+g.close()
+try:
+    print(next(g))
+except StopIteration:
+    print("StopIteration")
+
+# case where generator ignores the close request and yields instead
+def gen7():
+    try:
+        yield 123
+    except GeneratorExit:
+        yield 456
+
+g = gen7()
+print(next(g))
+try:
+    g.close()
+except RuntimeError:
+    print('RuntimeError')
+
+# case where close is propagated up to a built-in iterator
+def gen8():
+    g = range(2)
+    yield from g
+g = gen8()
+print(next(g))
+g.close()
+
+# case with a user-defined close method
+class Iter:
+    def __iter__(self):
+        return self
+    def __next__(self):
+        return 1
+    def close(self):
+        print('close')
+def gen9():
+    yield from Iter()
+g = gen9()
+print(next(g))
+g.close()