chore: import upstream snapshot with attribution

test/sot/test_stack.py

@@ -0,0 +1,56 @@
+# Copyright (c) 2023 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import unittest
+
+from paddle.jit.sot.opcode_translator.executor.variable_stack import (
+    VariableStack,
+)
+
+
+class TestVariableStack(unittest.TestCase):
+    def test_basic(self):
+        stack = VariableStack([1, 2, 3])
+        self.assertEqual(str(stack), "[1, 2, 3]")
+        self.assertEqual(len(stack), 3)
+        self.assertEqual(str(stack.copy()), str(stack))
+
+    def test_peek(self):
+        stack = VariableStack([1, 2, 3])
+        self.assertEqual(stack.peek(), 3)
+        self.assertEqual(stack.top, 3)
+        self.assertEqual(stack.peek(1), 3)
+        stack.peek[1] = 4
+        stack.peek[2] = 3
+        self.assertEqual(stack.peek[1], 4)
+        self.assertEqual(stack.peek[:1], [4])
+        self.assertEqual(stack.peek[:2], [3, 4])
+        stack.top = 5
+        self.assertEqual(stack.peek[:2], [3, 5])
+
+    def test_push_pop(self):
+        stack = VariableStack()
+        stack.push(1)
+        stack.push(2)
+        self.assertEqual(stack.pop(), 2)
+        self.assertEqual(stack.pop(), 1)
+
+    def test_pop_n(self):
+        stack = VariableStack([1, 2, 3, 4])
+        self.assertEqual(stack.pop_n(2), [3, 4])
+        self.assertEqual(stack.pop_n(2), [1, 2])
+
+
+if __name__ == "__main__":
+    unittest.main()