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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 tensorflow.python.ops.control_flow_util."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from tensorflow.python.framework import dtypes
from tensorflow.python.framework import ops
from tensorflow.python.framework import test_ops
from tensorflow.python.ops import array_ops
from tensorflow.python.ops import control_flow_ops
from tensorflow.python.ops import control_flow_util
from tensorflow.python.ops import math_ops
from tensorflow.python.ops import gen_control_flow_ops
from tensorflow.python.platform import test
class ControlFlowUtilTest(test.TestCase):
def testIsSwitch(self):
switch_false, _ = control_flow_ops.switch(1, True)
switch = switch_false.op
self.assertTrue(control_flow_util.IsSwitch(switch))
ref_switch_false, _ = control_flow_ops.ref_switch(test_ops.ref_output(),
True)
ref_switch = ref_switch_false.op
self.assertTrue(control_flow_util.IsSwitch(ref_switch))
self.assertFalse(control_flow_util.IsSwitch(test_ops.int_output().op))
def testIsLoopEnter(self):
enter = gen_control_flow_ops.enter(1, frame_name="name").op
self.assertTrue(control_flow_util.IsLoopEnter(enter))
self.assertFalse(control_flow_util.IsLoopConstantEnter(enter))
ref_enter = gen_control_flow_ops.ref_enter(test_ops.ref_output(),
frame_name="name").op
self.assertTrue(control_flow_util.IsLoopEnter(ref_enter))
self.assertFalse(control_flow_util.IsLoopConstantEnter(ref_enter))
const_enter = gen_control_flow_ops.enter(1, frame_name="name",
is_constant=True).op
self.assertTrue(control_flow_util.IsLoopEnter(const_enter))
self.assertTrue(control_flow_util.IsLoopConstantEnter(const_enter))
self.assertFalse(control_flow_util.IsLoopEnter(test_ops.int_output().op))
def testIsLoopExit(self):
exit_op = control_flow_ops.exit(1).op
self.assertTrue(control_flow_util.IsLoopExit(exit_op))
ref_exit = control_flow_ops.exit(test_ops.ref_output()).op
self.assertTrue(control_flow_util.IsLoopExit(ref_exit))
self.assertFalse(control_flow_util.IsLoopExit(test_ops.int_output().op))
def build_test_graph(self):
g = ops.Graph()
with g.as_default():
def while_loop(x):
def b(x):
with ops.name_scope("NestedCond"):
return control_flow_ops.cond(
math_ops.less(x, 100), lambda: math_ops.add(x, 1),
lambda: math_ops.add(x, 2))
c = lambda x: math_ops.less(x, 10000)
with ops.name_scope("OuterWhile"):
return control_flow_ops.while_loop(c, b, [x])
x = array_ops.placeholder(dtypes.int32)
with ops.name_scope("OuterCond"):
control_flow_ops.cond(
math_ops.less(x, 1000), lambda: while_loop(x),
lambda: math_ops.add(x, 2))
return g
def testIsCondSwitch(self):
g = self.build_test_graph()
cond_switch = [
"OuterCond/cond/Switch",
"OuterCond/cond/OuterWhile/while/Switch",
"OuterCond/cond/OuterWhile/while/NestedCond/cond/Switch",
"OuterCond/cond/OuterWhile/while/NestedCond/cond/Add/Switch",
"OuterCond/cond/OuterWhile/while/NestedCond/cond/Add_1/Switch",
"OuterCond/cond/Add/Switch",
]
for n in g.get_operations():
if control_flow_util.IsSwitch(n):
self.assertTrue(
control_flow_util.IsCondSwitch(n) != control_flow_util.IsLoopSwitch(
n))
if n.name in cond_switch:
self.assertTrue(control_flow_util.IsSwitch(n))
self.assertTrue(
control_flow_util.IsCondSwitch(n),
msg="Mismatch for {}".format(n.name))
self.assertFalse(
control_flow_util.IsLoopSwitch(n),
msg="Mismatch for {}".format(n.name))
else:
self.assertFalse(
control_flow_util.IsCondSwitch(n),
msg="Mismatch for {}".format(n.name))
def testIsLoopSwitch(self):
g = self.build_test_graph()
loop_switch = ["OuterCond/cond/OuterWhile/while/Switch_1"]
for n in g.get_operations():
if control_flow_util.IsSwitch(n):
self.assertTrue(
control_flow_util.IsCondSwitch(n) != control_flow_util.IsLoopSwitch(
n))
if n.name in loop_switch:
self.assertTrue(control_flow_util.IsSwitch(n))
self.assertFalse(
control_flow_util.IsCondSwitch(n),
msg="Mismatch for {}".format(n.name))
self.assertTrue(
control_flow_util.IsLoopSwitch(n),
msg="Mismatch for {}".format(n.name))
else:
self.assertFalse(
control_flow_util.IsLoopSwitch(n),
msg="Mismatch for {}".format(n.name))
def testIsCondMerge(self):
g = self.build_test_graph()
cond_merges = [
"OuterCond/cond/OuterWhile/while/NestedCond/cond/Merge",
"OuterCond/cond/Merge"
]
for n in g.get_operations():
if n.name in cond_merges:
self.assertTrue(control_flow_util.IsMerge(n))
self.assertTrue(control_flow_util.IsCondMerge(n))
self.assertFalse(control_flow_util.IsLoopMerge(n))
else:
self.assertFalse(control_flow_util.IsCondMerge(n))
self.assertTrue(not control_flow_util.IsMerge(n) or
control_flow_util.IsLoopMerge(n))
def testIsLoopMerge(self):
g = self.build_test_graph()
loop_merges = [
"OuterCond/cond/OuterWhile/while/Merge",
]
for n in g.get_operations():
if n.name in loop_merges:
self.assertTrue(control_flow_util.IsMerge(n))
self.assertFalse(control_flow_util.IsCondMerge(n))
self.assertTrue(control_flow_util.IsLoopMerge(n))
else:
self.assertFalse(control_flow_util.IsLoopMerge(n))
self.assertTrue(not control_flow_util.IsMerge(n) or
control_flow_util.IsCondMerge(n))
if __name__ == "__main__":
test.main()
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