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
|
/**
* Copyright (C) 2016 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include "mongo/platform/basic.h"
#include <vector>
#include "mongo/bson/bsonelement.h"
#include "mongo/bson/bsonmisc.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/json.h"
#include "mongo/db/pipeline/aggregation_context_fixture.h"
#include "mongo/db/pipeline/dependencies.h"
#include "mongo/db/pipeline/document_source.h"
#include "mongo/db/pipeline/value.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
namespace {
using boost::intrusive_ptr;
using std::vector;
//
// DocumentSourceProject delegates much of its responsibilities to the ParsedAggregationProjection.
// Most of the functional tests are testing ParsedAggregationProjection directly. These are meant as
// simpler integration tests.
//
// This provides access to getExpCtx(), but we'll use a different name for this test suite.
using ProjectStageTest = AggregationContextFixture;
TEST_F(ProjectStageTest, InclusionProjectionShouldRemoveUnspecifiedFields) {
auto project =
DocumentSourceProject::create(BSON("a" << true << "c" << BSON("d" << true)), getExpCtx());
auto source = DocumentSourceMock::create("{_id: 0, a: 1, b: 1, c: {d: 1}}");
project->setSource(source.get());
// The first result exists and is as expected.
auto next = project->getNext();
ASSERT_TRUE(next.isAdvanced());
ASSERT_EQUALS(1, next.getDocument().getField("a").getInt());
ASSERT(next.getDocument().getField("b").missing());
// The _id field is included by default in the root document.
ASSERT_EQUALS(0, next.getDocument().getField("_id").getInt());
// The nested c.d inclusion.
ASSERT_EQUALS(1, next.getDocument()["c"]["d"].getInt());
}
TEST_F(ProjectStageTest, ShouldOptimizeInnerExpressions) {
auto project = DocumentSourceProject::create(
BSON("a" << BSON("$and" << BSON_ARRAY(BSON("$const" << true)))), getExpCtx());
project->optimize();
// The $and should have been replaced with its only argument.
vector<Value> serializedArray;
project->serializeToArray(serializedArray);
ASSERT_BSONOBJ_EQ(serializedArray[0].getDocument().toBson(),
fromjson("{$project: {_id: true, a: {$const: true}}}"));
}
TEST_F(ProjectStageTest, ShouldErrorOnNonObjectSpec) {
BSONObj spec = BSON("$project"
<< "foo");
BSONElement specElement = spec.firstElement();
ASSERT_THROWS(DocumentSourceProject::createFromBson(specElement, getExpCtx()), UserException);
}
/**
* Basic sanity check that two documents can be projected correctly with a simple inclusion
* projection.
*/
TEST_F(ProjectStageTest, InclusionShouldBeAbleToProcessMultipleDocuments) {
auto project = DocumentSourceProject::create(BSON("a" << true), getExpCtx());
auto source = DocumentSourceMock::create({"{a: 1, b: 2}", "{a: 3, b: 4}"});
project->setSource(source.get());
auto next = project->getNext();
ASSERT(next.isAdvanced());
ASSERT_EQUALS(1, next.getDocument().getField("a").getInt());
ASSERT(next.getDocument().getField("b").missing());
next = project->getNext();
ASSERT(next.isAdvanced());
ASSERT_EQUALS(3, next.getDocument().getField("a").getInt());
ASSERT(next.getDocument().getField("b").missing());
ASSERT(project->getNext().isEOF());
ASSERT(project->getNext().isEOF());
ASSERT(project->getNext().isEOF());
}
/**
* Basic sanity check that two documents can be projected correctly with a simple inclusion
* projection.
*/
TEST_F(ProjectStageTest, ExclusionShouldBeAbleToProcessMultipleDocuments) {
auto project = DocumentSourceProject::create(BSON("a" << false), getExpCtx());
auto source = DocumentSourceMock::create({"{a: 1, b: 2}", "{a: 3, b: 4}"});
project->setSource(source.get());
auto next = project->getNext();
ASSERT(next.isAdvanced());
ASSERT(next.getDocument().getField("a").missing());
ASSERT_EQUALS(2, next.getDocument().getField("b").getInt());
next = project->getNext();
ASSERT(next.isAdvanced());
ASSERT(next.getDocument().getField("a").missing());
ASSERT_EQUALS(4, next.getDocument().getField("b").getInt());
ASSERT(project->getNext().isEOF());
ASSERT(project->getNext().isEOF());
ASSERT(project->getNext().isEOF());
}
TEST_F(ProjectStageTest, InclusionShouldAddDependenciesOfIncludedAndComputedFields) {
auto project = DocumentSourceProject::create(
fromjson("{a: true, x: '$b', y: {$and: ['$c','$d']}, z: {$meta: 'textScore'}}"),
getExpCtx());
DepsTracker dependencies(DepsTracker::MetadataAvailable::kTextScore);
ASSERT_EQUALS(DocumentSource::EXHAUSTIVE_FIELDS, project->getDependencies(&dependencies));
ASSERT_EQUALS(5U, dependencies.fields.size());
// Implicit _id dependency.
ASSERT_EQUALS(1U, dependencies.fields.count("_id"));
// Inclusion dependency.
ASSERT_EQUALS(1U, dependencies.fields.count("a"));
// Field path expression dependency.
ASSERT_EQUALS(1U, dependencies.fields.count("b"));
// Nested expression dependencies.
ASSERT_EQUALS(1U, dependencies.fields.count("c"));
ASSERT_EQUALS(1U, dependencies.fields.count("d"));
ASSERT_EQUALS(false, dependencies.needWholeDocument);
ASSERT_EQUALS(true, dependencies.getNeedTextScore());
}
TEST_F(ProjectStageTest, ExclusionShouldNotAddDependencies) {
auto project = DocumentSourceProject::create(fromjson("{a: false, 'b.c': false}"), getExpCtx());
DepsTracker dependencies;
ASSERT_EQUALS(DocumentSource::SEE_NEXT, project->getDependencies(&dependencies));
ASSERT_EQUALS(0U, dependencies.fields.size());
ASSERT_EQUALS(false, dependencies.needWholeDocument);
ASSERT_EQUALS(false, dependencies.getNeedTextScore());
}
} // namespace
} // namespace mongo
|
