This repository has been archived by the owner on Jan 20, 2023. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 11
/
serde_test.go
297 lines (292 loc) · 7.32 KB
/
serde_test.go
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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
package tdigest
import (
"errors"
"io"
"reflect"
"testing"
)
func TestMarshalRoundTrip(t *testing.T) {
testcase := func(in *TDigest) func(*testing.T) {
return func(t *testing.T) {
b, err := in.MarshalBinary()
if err != nil {
t.Fatalf("MarshalBinary err: %v", err)
}
out := new(TDigest)
err = out.UnmarshalBinary(b)
if err != nil {
t.Fatalf("UnmarshalBinary err: %v", err)
}
if !reflect.DeepEqual(in, out) {
t.Errorf("marshaling round trip resulted in changes")
t.Logf("in: %+v", in)
t.Logf("out: %+v", out)
}
}
}
t.Run("empty", testcase(New()))
t.Run("1 value", testcase(simpleTDigest(1)))
t.Run("1000 values", testcase(simpleTDigest(1000)))
d := New()
d.Add(1, 1)
d.Add(1, 1)
d.Add(0, 1)
t.Run("1, 1, 0 input", testcase(d))
}
func TestUnmarshalErrors(t *testing.T) {
testcase := func(in []byte, wantErr error) func(*testing.T) {
return func(t *testing.T) {
have := new(TDigest)
err := unmarshalBinary(have, in)
if err != nil {
if wantErr == nil {
t.Fatalf("unexpected unmarshal err: %v", err)
}
if err.Error() != wantErr.Error() {
t.Fatalf("wrong error, want=%q, have=%q", wantErr.Error(), err.Error())
} else {
return
}
} else if wantErr != nil {
t.Fatalf("expected err=%q, got nil", wantErr.Error())
}
}
}
t.Run("nil", testcase(
nil,
io.ErrUnexpectedEOF,
))
t.Run("bad magic", testcase(
[]byte{
0x80, 0x0d,
},
errors.New("data corruption detected: invalid header magic value 0x0d80"),
))
t.Run("incomplete encoding", testcase(
[]byte{
0x80, 0x0c,
0x00,
},
io.ErrUnexpectedEOF,
))
t.Run("bad encoding", testcase(
[]byte{
0x80, 0x0c,
0xFF, 0xFF, 0xFF, 0xFF,
},
errors.New("data corruption detected: invalid encoding version -1"),
))
t.Run("incomplete compression", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00,
},
io.ErrUnexpectedEOF,
))
t.Run("incomplete n", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x00,
},
io.ErrUnexpectedEOF,
))
t.Run("negative n", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0xFF, 0xFF, 0xFF, 0xFF,
},
errors.New("data corruption detected: number of centroids cannot be negative, have -1"),
))
t.Run("huge n", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0xFF, 0xFF, 0xFF, 0x7F,
},
errors.New("invalid n, cannot be greater than 2^20: 2147483647"),
))
t.Run("missing centroids", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x01, 0x00, 0x00, 0x00,
},
io.ErrUnexpectedEOF,
))
t.Run("partial centroid", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x01, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00,
},
io.ErrUnexpectedEOF,
))
t.Run("negative count", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x01, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x3F,
},
errors.New("data corruption detected: negative count: -1"),
))
t.Run("decreasing means", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x02, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x3F,
},
errors.New("data corruption detected: centroid 1 has lower mean (1) than preceding centroid 0 (2)"),
))
t.Run("nan mean", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x01, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
},
errors.New("data corruption detected: NaN mean not permitted"),
))
t.Run("+inf mean", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x01, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x7F,
},
errors.New("data corruption detected: Inf mean not permitted"),
))
t.Run("-inf mean", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x01, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0xFF,
},
errors.New("data corruption detected: Inf mean not permitted"),
))
t.Run("total size overflow", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x02, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x3F,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40,
},
errors.New("data corruption detected: centroid total size overflow"),
))
t.Run("trailing bytes", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x02, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x3F,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40,
0x00,
},
errors.New("found 1 unexpected bytes trailing the tdigest"),
))
}
func TestUnmarshal(t *testing.T) {
testcase := func(in []byte, want *TDigest) func(*testing.T) {
return func(t *testing.T) {
have := new(TDigest)
err := unmarshalBinary(have, in)
if err != nil {
t.Fatalf("unexpected unmarshal err: %v", err)
}
if !reflect.DeepEqual(have, want) {
t.Error("unmarshal did not produce expected digest")
t.Logf("want=%s", want.debugStr())
t.Logf("have=%s", have.debugStr())
}
}
}
t.Run("no centroids", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x00, 0x00, 0x00, 0x00,
},
&TDigest{
centroids: make([]*centroid, 0),
compression: 100,
countTotal: 0,
},
))
t.Run("one centroid", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x01, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x3F,
},
&TDigest{
centroids: []*centroid{
¢roid{
count: 1,
mean: 1,
},
},
compression: 100,
countTotal: 1,
},
))
t.Run("two centroids", testcase(
[]byte{
0x80, 0x0c,
0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,
0x02, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x3F,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40,
},
&TDigest{
centroids: []*centroid{
¢roid{
count: 1,
mean: 1,
},
¢roid{
count: 1,
mean: 2,
},
},
compression: 100,
countTotal: 2,
},
))
}