tests/basics: Add tests to test repeated throw into the same generator.

Signed-off-by: Damien George <damien@micropython.org>

tests/basics/gen_yield_from_throw_repeat.py

@@ -0,0 +1,22 @@
+# Test throwing repeatedly into the same generator, where that generator
+# is yielding from another generator.
+
+
+def yielder():
+    yield 4
+    yield 5
+
+
+def gen():
+    while True:
+        try:
+            print("gen received:", (yield from yielder()))
+        except ValueError as exc:
+            print(repr(exc))
+
+
+g = gen()
+for i in range(2):
+    print("send, got:", g.send(None))
+    print("throw, got:", g.throw(ValueError("a", i)))
+    print("throw, got:", g.throw(ValueError("b", i)))

tests/basics/generator_throw_repeat.py

@@ -0,0 +1,16 @@
+# Test throwing repeatedly into the same generator.
+
+
+def gen():
+    while True:
+        try:
+            print("gen received:", (yield "value"))
+        except ValueError as exc:
+            print(repr(exc))
+
+
+g = gen()
+for i in range(2):
+    print("send, got:", g.send(None))
+    print("throw, got:", g.throw(ValueError("a", i)))
+    print("throw, got:", g.throw(ValueError("b", i)))