1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* 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.
==============================================================================*/
#include "tensorflow/cc/ops/while_loop.h"
#include "tensorflow/cc/client/client_session.h"
#include "tensorflow/cc/ops/standard_ops.h"
#include "tensorflow/core/framework/tensor_testutil.h"
#include "tensorflow/core/graph/while_context.h"
#include "tensorflow/core/lib/core/status_test_util.h"
#include "tensorflow/core/platform/test.h"
namespace tensorflow {
namespace {
class WhileLoopTest : public ::testing::Test {
protected:
WhileLoopTest() : scope_(Scope::NewRootScope()) {}
void Init(int num_inputs, DataType dtype = DT_INT32) {
for (int i = 0; i < num_inputs; ++i) {
inputs_.push_back(ops::Placeholder(scope_, dtype));
}
}
void CreateLoop(const ops::CondGraphBuilderFn& cond,
const ops::BodyGraphBuilderFn& body,
error::Code error_code = error::OK,
const string& error_msg = "") {
Status s =
ops::BuildWhileLoop(scope_, inputs_, cond, body, kFrameName, &outputs_);
EXPECT_EQ(s.code(), error_code);
EXPECT_EQ(s.error_message(), error_msg);
}
template <typename T>
void Run(const std::vector<Input::Initializer>& input_values,
const std::vector<T>& expected_output_values) {
ClientSession session(scope_);
DCHECK_EQ(input_values.size(), inputs_.size());
ClientSession::FeedType feeds;
for (int i = 0; i < inputs_.size(); ++i) {
feeds.emplace(inputs_[i], input_values[i]);
}
std::vector<Tensor> out_tensors;
TF_ASSERT_OK(session.Run(feeds, outputs_, &out_tensors));
ASSERT_EQ(out_tensors.size(), outputs_.size());
DCHECK_EQ(expected_output_values.size(), out_tensors.size());
for (int i = 0; i < out_tensors.size(); ++i) {
test::ExpectTensorEqual<T>(
out_tensors[i], test::AsTensor<T>({expected_output_values[i]}, {}));
}
}
Scope scope_;
std::vector<Output> inputs_;
std::vector<Output> outputs_;
static const char* const kFrameName;
};
const char* const WhileLoopTest::kFrameName = "test_loop";
Status LessThanTenCond(const Scope& s, const std::vector<Output>& inputs,
Output* output) {
*output = ops::Less(s, inputs[0], 10);
return s.status();
}
Status AddOneBody(const Scope& s, const std::vector<Output>& inputs,
std::vector<Output>* outputs) {
outputs->push_back(ops::Add(s, inputs[0], 1));
return s.status();
}
TEST_F(WhileLoopTest, Basic) {
// Create loop: while (i < 10) i += 1
Init(1);
CreateLoop(LessThanTenCond, AddOneBody);
// Verify some output invariants
WhileContext* while_ctx;
for (int i = 0; i < outputs_.size(); ++i) {
Node* node = outputs_[i].node();
ASSERT_TRUE(node->IsExit()) << "Output node " << i << ":\n"
<< node->DebugString();
ASSERT_TRUE(node->while_ctx() != nullptr) << i;
if (i == 0) {
while_ctx = node->while_ctx();
EXPECT_EQ(while_ctx->frame_name(), kFrameName);
} else {
EXPECT_EQ(node->while_ctx(), while_ctx) << i;
}
}
// Run the loop and test we get the expected results
Run<int>({1}, {10});
Run<int>({11}, {11});
}
TEST_F(WhileLoopTest, WrongCondOutputType) {
Init(1);
CreateLoop(
[](const Scope& s, const std::vector<Output>& inputs, Output* output) {
*output = ops::Placeholder(s, DT_FLOAT);
return s.status();
},
AddOneBody, error::INVALID_ARGUMENT,
"BuildWhileLoop: 'cond' argument must return a boolean output, got "
"float");
}
// TODO(skyewm): test bad cond output shape
TEST_F(WhileLoopTest, NullCondOutputNode) {
Init(1);
// TODO(skyewm): improve error message
CreateLoop(
[](const Scope& s, const std::vector<Output>& inputs, Output* output) {
*output = {nullptr, 0};
return s.status();
},
AddOneBody, error::INVALID_ARGUMENT, "Node is null");
}
TEST_F(WhileLoopTest, InvalidCondOutputIndex) {
Init(1);
CreateLoop(
[](const Scope& s, const std::vector<Output>& inputs, Output* output) {
auto less = ops::Less(s, inputs[0], 10);
*output = {less.node(), 100};
return s.status();
},
AddOneBody, error::OUT_OF_RANGE,
"Node 'cond/Less' (type: 'Less', num of outputs: 1) does not have output "
"100");
}
TEST_F(WhileLoopTest, UnsetCondOutput) {
Init(1);
CreateLoop([](const Scope& s, const std::vector<Output>& inputs,
Output* output) { return s.status(); },
AddOneBody, error::INVALID_ARGUMENT, "Node is null");
}
// TODO(skyewm): test bad body output type
// TODO(skyewm): test bad body output shape
TEST_F(WhileLoopTest, NullBodyOutputNode) {
Init(1);
// TODO(skyewm): improve error message
CreateLoop(LessThanTenCond,
[](const Scope& s, const std::vector<Output>& inputs,
std::vector<Output>* outputs) {
outputs->push_back({nullptr, 0});
return s.status();
},
error::INVALID_ARGUMENT, "Node is null");
}
TEST_F(WhileLoopTest, InvalidBodyOutputIndex) {
Init(1);
CreateLoop(LessThanTenCond,
[](const Scope& s, const std::vector<Output>& inputs,
std::vector<Output>* outputs) {
auto add = ops::Add(s, inputs[0], 1);
outputs->emplace_back(add.node(), 100);
return s.status();
},
error::OUT_OF_RANGE,
"Node 'body/Add' (type: 'Add', num of outputs: 1) does not have "
"output 100");
}
TEST_F(WhileLoopTest, UnsetBodyOutputs) {
Init(1);
CreateLoop(
LessThanTenCond,
[](const Scope& s, const std::vector<Output>& inputs,
std::vector<Output>* outputs) { return s.status(); },
error::INVALID_ARGUMENT,
"BuildWhileLoop: 'body' argument expected to return 1 output(s), got 0");
}
} // namespace
} // namespace tensorflow
|
