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+# Copyright 2017 The TensorFlow 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.
+# ==============================================================================
+"""Tests for control_flow module."""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+from tensorflow.python.autograph.operators import control_flow
+from tensorflow.python.data.ops import dataset_ops
+from tensorflow.python.framework import constant_op
+from tensorflow.python.framework import dtypes
+from tensorflow.python.ops import math_ops
+from tensorflow.python.platform import test
+
+
+class ForLoopTest(test.TestCase):
+
+ def test_tensor(self):
+ s = control_flow.for_stmt(
+ constant_op.constant([1, 2, 3, 4]),
+ extra_test=lambda s: True,
+ body=lambda i, s: (s + i,),
+ init_state=(0,))
+ with self.cached_session() as sess:
+ self.assertEqual((10,), sess.run(s))
+
+ def test_python(self):
+ s = control_flow.for_stmt(
+ range(5),
+ extra_test=lambda s: True,
+ body=lambda i, s: (s + i,),
+ init_state=(0,))
+ self.assertEqual(10, s)
+
+ def test_dataset(self):
+ to_int32 = lambda i: math_ops.cast(i, dtypes.int32)
+ s = control_flow.for_stmt(
+ dataset_ops.Dataset.range(5).map(to_int32),
+ extra_test=lambda s: True,
+ body=lambda i, s: (s + i,),
+ init_state=(0,))
+ with self.cached_session() as sess:
+ self.assertEqual((10,), sess.run(s))
+
+
+class WhileLoopTest(test.TestCase):
+
+ def test_tensor(self):
+ n = constant_op.constant(5)
+ results = control_flow.while_stmt(
+ test=lambda i, s: i < n,
+ body=lambda i, s: (i + 1, s + i,),
+ init_state=(0, 0),
+ extra_deps=(n,))
+ with self.cached_session() as sess:
+ self.assertEqual((5, 10), sess.run(results))
+
+ def test_python(self):
+ n = 5
+ results = control_flow.while_stmt(
+ test=lambda i, s: i < n,
+ body=lambda i, s: (i + 1, s + i),
+ init_state=(0, 0),
+ extra_deps=(n,))
+ self.assertEqual((5, 10), results)
+
+
+class IfStmtTest(test.TestCase):
+
+ def test_tensor(self):
+ def test_if_stmt(cond):
+ return control_flow.if_stmt(
+ cond=cond,
+ body=lambda: 1,
+ orelse=lambda: -1)
+
+ with self.cached_session() as sess:
+ self.assertEqual(1, sess.run(test_if_stmt(constant_op.constant(True))))
+ self.assertEqual(-1, sess.run(test_if_stmt(constant_op.constant(False))))
+
+ def test_python(self):
+ self.assertEqual(1, control_flow.if_stmt(True, lambda: 1, lambda: -1))
+ self.assertEqual(-1, control_flow.if_stmt(False, lambda: 1, lambda: -1))
+
+
+if __name__ == '__main__':
+ test.main()