tests/basics: Improve test coverage for generators.

tests/basics/gen_yield_from_close.py

@@ -85,3 +85,17 @@ 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')

tests/basics/gen_yield_from_throw.py

@@ -17,3 +17,14 @@ try:
 except TypeError:
     print("got TypeError from downstream!")
 
+# case where generator doesn't intercept the thrown/injected exception
+def gen3():
+    yield 123
+    yield 456
+        
+g3 = gen3()
+print(next(g3))
+try:
+    g3.throw(StopIteration)
+except StopIteration:
+    print('got StopIteration from downstream!')

tests/basics/gen_yield_from_throw2.py

+# uPy differs from CPython for this test
+# generator ignored GeneratorExit
+def gen():
+    try:
+        yield 123
+    except GeneratorExit:
+        print('GeneratorExit')
+    yield 456
+        
+g = gen()
+print(next(g))
+try:
+    g.throw(GeneratorExit)
+except RuntimeError:
+    print('RuntimeError')

tests/basics/gen_yield_from_throw2.py.exp

+123
+GeneratorExit
+RuntimeError

tests/basics/generator1.py

@@ -20,3 +20,6 @@ for val in f(3):
 #print(gen.__next__())
 #print(gen.__next__())
 #print(gen.__next__())
+
+# test printing, but only the first chars that match CPython
+print(repr(f(0))[0:17])

tests/run-tests

@@ -271,7 +271,7 @@ def run_tests(pyb, tests, args):
     # Some tests are known to fail with native emitter
     # Remove them from the below when they work
     if args.emit == 'native':
-        skip_tests.update({'basics/%s.py' % t for t in 'gen_yield_from gen_yield_from_close gen_yield_from_ducktype gen_yield_from_exc gen_yield_from_iter gen_yield_from_send gen_yield_from_stopped gen_yield_from_throw generator1 generator2 generator_args generator_close generator_closure generator_exc generator_return generator_send'.split()}) # require yield
+        skip_tests.update({'basics/%s.py' % t for t in 'gen_yield_from gen_yield_from_close gen_yield_from_ducktype gen_yield_from_exc gen_yield_from_iter gen_yield_from_send gen_yield_from_stopped gen_yield_from_throw gen_yield_from_throw2 generator1 generator2 generator_args generator_close generator_closure generator_exc generator_return generator_send'.split()}) # require yield
         skip_tests.update({'basics/%s.py' % t for t in 'bytes_gen class_store_class globals_del string_join'.split()}) # require yield
         skip_tests.update({'basics/async_%s.py' % t for t in 'def await await2 for for2 with with2'.split()}) # require yield
         skip_tests.update({'basics/%s.py' % t for t in 'try_reraise try_reraise2'.split()}) # require raise_varargs