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
|
package com.fasterxml.jackson.databind.node;
import java.io.ByteArrayInputStream;
import java.io.StringReader;
import java.nio.charset.StandardCharsets;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.TreeNode;
import com.fasterxml.jackson.databind.*;
/**
* Tests to verify handling of empty content with "readTree()"
*/
public class EmptyContentAsTreeTest extends BaseMapTest
{
private final ObjectMapper MAPPER = objectMapper();
private final String EMPTY0 = "";
private final byte[] EMPTY0_BYTES = EMPTY0.getBytes(StandardCharsets.UTF_8);
private final String EMPTY1 = " \n\t ";
private final byte[] EMPTY1_BYTES = EMPTY1.getBytes(StandardCharsets.UTF_8);
// [databind#1406]: when passing `JsonParser`, indicate lack of content
// by returning `null`
public void testNullFromEOFWithParserAndMapper() throws Exception
{
try (JsonParser p = MAPPER.createParser(EMPTY0)) {
_assertNullTree(MAPPER.readTree(p));
}
try (JsonParser p = MAPPER.createParser(EMPTY1)) {
_assertNullTree(MAPPER.readTree(p));
}
try (JsonParser p = MAPPER.createParser(new StringReader(EMPTY0))) {
_assertNullTree(MAPPER.readTree(p));
}
try (JsonParser p = MAPPER.createParser(new StringReader(EMPTY1))) {
_assertNullTree(MAPPER.readTree(p));
}
try (JsonParser p = MAPPER.createParser(EMPTY0_BYTES)) {
_assertNullTree(MAPPER.readTree(p));
}
try (JsonParser p = MAPPER.createParser(EMPTY1_BYTES)) {
_assertNullTree(MAPPER.readTree(p));
}
try (JsonParser p = MAPPER.createParser(EMPTY1_BYTES, 0, EMPTY1_BYTES.length)) {
_assertNullTree(MAPPER.readTree(p));
}
try (JsonParser p = MAPPER.createParser(new ByteArrayInputStream(EMPTY0_BYTES))) {
_assertNullTree(MAPPER.readTree(p));
}
try (JsonParser p = MAPPER.createParser(new ByteArrayInputStream(EMPTY1_BYTES))) {
_assertNullTree(MAPPER.readTree(p));
}
}
// [databind#1406]
public void testNullFromEOFWithParserAndReader() throws Exception
{
try (JsonParser p = MAPPER.createParser(EMPTY0)) {
_assertNullTree(MAPPER.reader().readTree(p));
}
try (JsonParser p = MAPPER.createParser(EMPTY1)) {
_assertNullTree(MAPPER.reader().readTree(p));
}
try (JsonParser p = MAPPER.createParser(new StringReader(EMPTY0))) {
_assertNullTree(MAPPER.reader().readTree(p));
}
try (JsonParser p = MAPPER.createParser(new StringReader(EMPTY1))) {
_assertNullTree(MAPPER.reader().readTree(p));
}
try (JsonParser p = MAPPER.createParser(EMPTY0_BYTES)) {
_assertNullTree(MAPPER.reader().readTree(p));
}
try (JsonParser p = MAPPER.createParser(EMPTY1_BYTES)) {
_assertNullTree(MAPPER.reader().readTree(p));
}
try (JsonParser p = MAPPER.createParser(EMPTY1_BYTES, 0, EMPTY1_BYTES.length)) {
_assertNullTree(MAPPER.reader().readTree(p));
}
try (JsonParser p = MAPPER.createParser(new ByteArrayInputStream(EMPTY0_BYTES))) {
_assertNullTree(MAPPER.reader().readTree(p));
}
try (JsonParser p = MAPPER.createParser(new ByteArrayInputStream(EMPTY1_BYTES))) {
_assertNullTree(MAPPER.reader().readTree(p));
}
}
// [databind#2211]: when passing content sources OTHER than `JsonParser`,
// return "missing node" instead of alternate (return `null`, throw exception).
public void testMissingNodeForEOFOtherMapper() throws Exception
{
_assertMissing(MAPPER.readTree(EMPTY0));
_assertMissing(MAPPER.readTree(EMPTY1));
_assertMissing(MAPPER.readTree(new StringReader(EMPTY0)));
_assertMissing(MAPPER.readTree(new StringReader(EMPTY1)));
_assertMissing(MAPPER.readTree(EMPTY0_BYTES));
_assertMissing(MAPPER.readTree(EMPTY0_BYTES, 0, EMPTY0_BYTES.length));
_assertMissing(MAPPER.readTree(new ByteArrayInputStream(EMPTY0_BYTES)));
_assertMissing(MAPPER.readTree(EMPTY1_BYTES));
_assertMissing(MAPPER.readTree(EMPTY1_BYTES, 0, EMPTY1_BYTES.length));
_assertMissing(MAPPER.readTree(new ByteArrayInputStream(EMPTY1_BYTES)));
// Assume File, URL, etc are fine. Note: `DataInput` probably can't be made to
// work since it can not easily/gracefully handle unexpected end-of-input
}
public void testMissingNodeViaObjectReader() throws Exception
{
_assertMissing(MAPPER.reader().readTree(EMPTY0));
_assertMissing(MAPPER.reader().readTree(EMPTY1));
_assertMissing(MAPPER.reader().readTree(new StringReader(EMPTY0)));
_assertMissing(MAPPER.reader().readTree(new StringReader(EMPTY1)));
_assertMissing(MAPPER.reader().readTree(EMPTY0_BYTES));
_assertMissing(MAPPER.reader().readTree(EMPTY0_BYTES, 0, EMPTY0_BYTES.length));
_assertMissing(MAPPER.reader().readTree(new ByteArrayInputStream(EMPTY0_BYTES)));
_assertMissing(MAPPER.reader().readTree(EMPTY1_BYTES));
_assertMissing(MAPPER.reader().readTree(EMPTY1_BYTES, 0, EMPTY1_BYTES.length));
_assertMissing(MAPPER.reader().readTree(new ByteArrayInputStream(EMPTY1_BYTES)));
}
private void _assertNullTree(TreeNode n) {
if (n != null) {
fail("Should get `null` for reads with `JsonParser`, instead got: "+n.getClass().getName());
}
}
private void _assertMissing(JsonNode n) {
assertNotNull("Should not get `null` but `MissingNode`", n);
if (!n.isMissingNode()) {
fail("Should get `MissingNode` but got: "+n.getClass().getName());
}
}
}
|
