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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 reduction operators."""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import numpy as np
+
+from tensorflow.compiler.tests.xla_test import XLATestCase
+from tensorflow.python.framework import dtypes
+from tensorflow.python.framework import errors_impl
+from tensorflow.python.ops import array_ops
+from tensorflow.python.ops import math_ops
+from tensorflow.python.platform import googletest
+
+
+class ReduceOpsTest(XLATestCase):
+
+ def _testReduction(self, tf_reduce_fn, np_reduce_fn, dtype, test_inputs,
+ rtol=1e-4, atol=1e-4):
+ """Tests that the output of 'tf_reduce_fn' matches numpy's output."""
+
+ for test_input in test_inputs:
+ with self.test_session() as sess:
+ with self.test_scope():
+ a = array_ops.placeholder(dtype)
+ index = array_ops.placeholder(dtypes.int32)
+ out = tf_reduce_fn(a, index)
+ result = sess.run(out, {a: test_input, index: [0]})
+ self.assertAllClose(result, np_reduce_fn(test_input, axis=0),
+ rtol=rtol, atol=atol)
+
+ result = sess.run(out, {a: test_input, index: [1]})
+ self.assertAllClose(result, np_reduce_fn(test_input, axis=1),
+ rtol=rtol, atol=atol)
+
+ result = sess.run(out, {a: test_input, index: [-1]})
+ self.assertAllClose(result, np_reduce_fn(test_input, axis=1),
+ rtol=rtol, atol=atol)
+
+ with self.assertRaisesWithPredicateMatch(
+ errors_impl.InvalidArgumentError, 'Invalid reduction dim'):
+ sess.run(out, {a: test_input, index: [-33]})
+
+ with self.assertRaisesWithPredicateMatch(
+ errors_impl.InvalidArgumentError, 'Invalid reduction dim'):
+ sess.run(out, {a: test_input, index: [2]})
+
+ FLOAT_DATA = [
+ np.zeros(shape=(2, 0)),
+ np.zeros(shape=(0, 30)),
+ np.arange(1, 7).reshape(2, 3),
+ np.arange(-10, -4).reshape(2, 3),
+ np.arange(-4, 2).reshape(2, 3),
+ ]
+ NONEMPTY_FLOAT_DATA = [
+ np.arange(1, 7).reshape(2, 3),
+ np.arange(-10, -4).reshape(2, 3),
+ np.arange(-4, 2).reshape(2, 3),
+ ]
+ BOOL_DATA = [
+ np.array([], dtype=np.bool).reshape(2, 0),
+ np.array([], dtype=np.bool).reshape(0, 3),
+ np.array([[False, True, False], [True, True, False]]),
+ ]
+
+ def testReduceSum(self):
+ self._testReduction(math_ops.reduce_sum, np.sum, np.float32,
+ self.FLOAT_DATA)
+
+ def testReduceProd(self):
+ self._testReduction(math_ops.reduce_prod, np.prod, np.float32,
+ self.FLOAT_DATA)
+
+ def testReduceMin(self):
+
+ def reference_min(inp, axis):
+ """Wrapper around np.amin that returns +infinity for an empty input."""
+ if inp.shape[axis] == 0:
+ return np.full(inp.shape[0:axis] + inp.shape[axis + 1:], float('inf'))
+ return np.amin(inp, axis)
+
+ self._testReduction(math_ops.reduce_min, reference_min, np.float32,
+ self.FLOAT_DATA)
+
+ def testReduceMax(self):
+
+ def reference_max(inp, axis):
+ """Wrapper around np.amax that returns -infinity for an empty input."""
+ if inp.shape[axis] == 0:
+ return np.full(inp.shape[0:axis] + inp.shape[axis + 1:], float('-inf'))
+ return np.amax(inp, axis)
+
+ self._testReduction(math_ops.reduce_max, reference_max, np.float32,
+ self.FLOAT_DATA)
+
+ def testReduceMean(self):
+ # TODO(phawkins): mean on XLA currently returns 0 instead of NaN when
+ # reducing across zero inputs.
+ self._testReduction(math_ops.reduce_mean, np.mean, np.float32,
+ self.NONEMPTY_FLOAT_DATA)
+
+ def testReduceAll(self):
+ self._testReduction(math_ops.reduce_all, np.all, np.bool, self.BOOL_DATA)
+
+ def testReduceAny(self):
+ self._testReduction(math_ops.reduce_any, np.any, np.bool, self.BOOL_DATA)
+
+
+if __name__ == '__main__':
+ googletest.main()