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
|
// In SERVER-8951, $indexOfBytes was introduced. In this file, we test the correctness and error
// cases of the expression.
load("jstests/aggregation/extras/utils.js"); // For assertErrorCode and testExpression.
(function() {
"use strict";
function testExpressionBytes(coll, expression, result, shouldTestEquivalence = true) {
testExpression(coll, expression, result);
if (shouldTestEquivalence) {
// If we are specifying a starting or ending index for the search, we should be able to
// achieve equivalent behavior using $substrBytes.
var indexOfSpec = expression["$indexOfBytes"];
var input = indexOfSpec[0];
var token = indexOfSpec[1];
var start = indexOfSpec.length > 2 ? indexOfSpec[2] : 0;
// Use $strLenBytes because JavaScript's length property is based off of UTF-16, not the
// actual number of bytes.
var end = indexOfSpec.length > 3 ? indexOfSpec[3] : {$strLenBytes: input};
var substrExpr = {
$indexOfBytes: [{$substrBytes: [input, start, {$subtract: [end, start]}]}, token]
};
// Since the new expression takes the index with respect to a shortened string, the
// output index will differ from the index with respect to the full length string,
// unless the output is -1.
var substrResult = (result === -1) ? -1 : result - start;
testExpression(coll, substrExpr, substrResult);
}
}
var coll = db.indexofbytes;
coll.drop();
// Insert a dummy document so something flows through the pipeline.
assert.commandWorked(coll.insert({}));
testExpressionBytes(coll, {$indexOfBytes: ["abc", "b"]}, 1);
testExpressionBytes(coll, {$indexOfBytes: ["abcba", "b"]}, 1);
testExpressionBytes(coll, {$indexOfBytes: ["abc", "d"]}, -1);
testExpressionBytes(coll, {$indexOfBytes: ["abcba", "b", 2]}, 3);
testExpressionBytes(coll, {$indexOfBytes: ["abcde", "d", 0, 2]}, -1);
testExpressionBytes(coll, {$indexOfBytes: ["abc", "b", 1]}, 1);
testExpressionBytes(coll, {$indexOfBytes: ["abc", "b", 0, 10]}, 1);
testExpressionBytes(coll, {$indexOfBytes: ["abcbabc", "b", 2, 4]}, 3);
// $strLenBytes does not accept null as an input.
testExpressionBytes(coll, {$indexOfBytes: [null, "b"]}, null, false);
testExpressionBytes(coll, {$indexOfBytes: ["abc", "b", 3]}, -1);
testExpressionBytes(coll, {$indexOfBytes: ["abc", "b", 3, 1]}, -1);
testExpressionBytes(coll, {$indexOfBytes: ["abc", "b", 3, 5]}, -1);
testExpressionBytes(coll, {$indexOfBytes: ["", " "]}, -1);
testExpressionBytes(coll, {$indexOfBytes: [" ", ""]}, 0);
testExpressionBytes(coll, {$indexOfBytes: ["", ""]}, 0);
testExpressionBytes(coll, {$indexOfBytes: ["abc", "", 3]}, 3);
testExpressionBytes(coll, {$indexOfBytes: ["abc", "", 1]}, 1);
// Test with multi-byte tokens.
testExpressionBytes(coll, {$indexOfBytes: ["abcde", "de"]}, 3);
testExpressionBytes(coll, {$indexOfBytes: ["abcde", "def"]}, -1);
// Test with non-ASCII characters. Some tests do not test equivalence using $substrBytes because
// $substrBytes disallows taking a substring that begins or ends in the middle of a UTF-8
// encoding of a character.
testExpressionBytes(coll, {$indexOfBytes: ["a∫∫b", "b"]}, 7);
// $substrBytes would attempt to take the substring from the middle of a UTF-8
// encoding of a character.
testExpressionBytes(coll, {$indexOfBytes: ["a∫∫b", "b", 6]}, 7, false);
testExpressionBytes(coll, {$indexOfBytes: ["abc∫ba", "∫"]}, 3);
testExpressionBytes(coll, {$indexOfBytes: ["∫∫∫", "a"]}, -1);
// $substrBytes would attempt to take the substring from the middle of a UTF-8
// encoding of a character.
testExpressionBytes(coll, {$indexOfBytes: ["ab∫c", "c", 0, 3]}, -1, false);
testExpressionBytes(coll, {$indexOfBytes: ["abc∫b∫", "b∫"]}, 6);
// Test with embedded null bytes.
testExpressionBytes(coll, {$indexOfBytes: ["abc\0d", "d"]}, 4);
testExpressionBytes(coll, {$indexOfBytes: ["abc\0", "\0"]}, 3);
testExpressionBytes(coll, {$indexOfBytes: ["abc\0d\0", "d", 5, 6]}, -1);
// Error cases.
var pipeline = {
$project: {
output: {
$indexOfBytes: [3, "s"],
}
}
};
assertErrorCode(coll, pipeline, 40091);
pipeline = {
$project: {
output: {
$indexOfBytes: ["s", 3],
}
}
};
assertErrorCode(coll, pipeline, 40092);
pipeline = {
$project: {output: {$indexOfBytes: ["abc", "b", "bad"]}}
};
assertErrorCode(coll, pipeline, 40096);
pipeline = {
$project: {output: {$indexOfBytes: ["abc", "b", 0, "bad"]}}
};
assertErrorCode(coll, pipeline, 40096);
pipeline = {
$project: {output: {$indexOfBytes: ["abc", "b", -1]}}
};
assertErrorCode(coll, pipeline, 40097);
pipeline = {
$project: {output: {$indexOfBytes: ["abc", "b", 1, -1]}}
};
assertErrorCode(coll, pipeline, 40097);
}());
|
