chore: import upstream snapshot with attribution

test/distribution/test_distribution_variable.py

@@ -0,0 +1,79 @@
+# Copyright (c) 2022 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
+
+import parameterize as param
+
+import paddle
+from paddle.distribution import constraint, variable
+
+paddle.seed(2022)
+
+
+@param.param_cls(
+    (param.TEST_CASE_NAME, 'is_discrete', 'event_rank', 'constraint'),
+    [('NotImplement', False, 0, constraint.Constraint())],
+)
+class TestVariable(unittest.TestCase):
+    def setUp(self):
+        self._var = variable.Variable(
+            self.is_discrete, self.event_rank, self.constraint
+        )
+
+    @param.param_func([(1,)])
+    def test_costraint(self, value):
+        with self.assertRaises(NotImplementedError):
+            self._var.constraint(value)
+
+
+@param.param_cls(
+    (param.TEST_CASE_NAME, 'base', 'rank'), [('real_base', variable.real, 10)]
+)
+class TestIndependent(unittest.TestCase):
+    def setUp(self):
+        self._var = variable.Independent(self.base, self.rank)
+
+    @param.param_func(
+        [
+            (paddle.rand([2, 3, 4]), ValueError),
+        ]
+    )
+    def test_costraint(self, value, expect):
+        with self.assertRaises(expect):
+            self._var.constraint(value)
+
+
+@param.param_cls(
+    (param.TEST_CASE_NAME, 'vars', 'axis'), [('real_base', [variable.real], 10)]
+)
+class TestStack(unittest.TestCase):
+    def setUp(self):
+        self._var = variable.Stack(self.vars, self.axis)
+
+    def test_is_discrete(self):
+        self.assertEqual(self._var.is_discrete, False)
+
+    @param.param_func(
+        [
+            (paddle.rand([2, 3, 4]), ValueError),
+        ]
+    )
+    def test_costraint(self, value, expect):
+        with self.assertRaises(expect):
+            self._var.constraint(value)
+
+
+if __name__ == '__main__':
+    unittest.main()