1 files changed, 168 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/greenlet/tests/test_generator_nested.py b/.venv/lib/python3.12/site-packages/greenlet/tests/test_generator_nested.py
new file mode 100644
index 00000000..8d752a63
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/greenlet/tests/test_generator_nested.py
@@ -0,0 +1,168 @@
+
+from greenlet import greenlet
+from . import TestCase
+from .leakcheck import fails_leakcheck
+
+class genlet(greenlet):
+    parent = None
+    def __init__(self, *args, **kwds):
+        self.args = args
+        self.kwds = kwds
+        self.child = None
+
+    def run(self):
+        # Note the function is packed in a tuple
+        # to avoid creating a bound method for it.
+        fn, = self.fn
+        fn(*self.args, **self.kwds)
+
+    def __iter__(self):
+        return self
+
+    def set_child(self, child):
+        self.child = child
+
+    def __next__(self):
+        if self.child:
+            child = self.child
+            while child.child:
+                tmp = child
+                child = child.child
+                tmp.child = None
+
+            result = child.switch()
+        else:
+            self.parent = greenlet.getcurrent()
+            result = self.switch()
+
+        if self:
+            return result
+
+        raise StopIteration
+
+    next = __next__
+
+def Yield(value, level=1):
+    g = greenlet.getcurrent()
+
+    while level != 0:
+        if not isinstance(g, genlet):
+            raise RuntimeError('yield outside a genlet')
+        if level > 1:
+            g.parent.set_child(g)
+        g = g.parent
+        level -= 1
+
+    g.switch(value)
+
+
+def Genlet(func):
+    class TheGenlet(genlet):
+        fn = (func,)
+    return TheGenlet
+
+# ____________________________________________________________
+
+
+def g1(n, seen):
+    for i in range(n):
+        seen.append(i + 1)
+        yield i
+
+
+def g2(n, seen):
+    for i in range(n):
+        seen.append(i + 1)
+        Yield(i)
+
+g2 = Genlet(g2)
+
+
+def nested(i):
+    Yield(i)
+
+
+def g3(n, seen):
+    for i in range(n):
+        seen.append(i + 1)
+        nested(i)
+g3 = Genlet(g3)
+
+
+def a(n):
+    if n == 0:
+        return
+    for ii in ax(n - 1):
+        Yield(ii)
+    Yield(n)
+ax = Genlet(a)
+
+
+def perms(l):
+    if len(l) > 1:
+        for e in l:
+            # No syntactical sugar for generator expressions
+            x = [Yield([e] + p) for p in perms([x for x in l if x != e])]
+            assert x
+    else:
+        Yield(l)
+perms = Genlet(perms)
+
+
+def gr1(n):
+    for ii in range(1, n):
+        Yield(ii)
+        Yield(ii * ii, 2)
+
+gr1 = Genlet(gr1)
+
+
+def gr2(n, seen):
+    for ii in gr1(n):
+        seen.append(ii)
+
+gr2 = Genlet(gr2)
+
+
+class NestedGeneratorTests(TestCase):
+    def test_layered_genlets(self):
+        seen = []
+        for ii in gr2(5, seen):
+            seen.append(ii)
+        self.assertEqual(seen, [1, 1, 2, 4, 3, 9, 4, 16])
+
+    @fails_leakcheck
+    def test_permutations(self):
+        gen_perms = perms(list(range(4)))
+        permutations = list(gen_perms)
+        self.assertEqual(len(permutations), 4 * 3 * 2 * 1)
+        self.assertIn([0, 1, 2, 3], permutations)
+        self.assertIn([3, 2, 1, 0], permutations)
+        res = []
+        for ii in zip(perms(list(range(4))), perms(list(range(3)))):
+            res.append(ii)
+        self.assertEqual(
+            res,
+            [([0, 1, 2, 3], [0, 1, 2]), ([0, 1, 3, 2], [0, 2, 1]),
+             ([0, 2, 1, 3], [1, 0, 2]), ([0, 2, 3, 1], [1, 2, 0]),
+             ([0, 3, 1, 2], [2, 0, 1]), ([0, 3, 2, 1], [2, 1, 0])])
+        # XXX Test to make sure we are working as a generator expression
+
+    def test_genlet_simple(self):
+        for g in g1, g2, g3:
+            seen = []
+            for _ in range(3):
+                for j in g(5, seen):
+                    seen.append(j)
+            self.assertEqual(seen, 3 * [1, 0, 2, 1, 3, 2, 4, 3, 5, 4])
+
+    def test_genlet_bad(self):
+        try:
+            Yield(10)
+        except RuntimeError:
+            pass
+
+    def test_nested_genlets(self):
+        seen = []
+        for ii in ax(5):
+            seen.append(ii)