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
|
// Copyright (c) 2017 Couchbase, Inc.
//
// 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.
package geo
import (
"fmt"
"math"
"reflect"
"strconv"
"testing"
)
func TestParseDistance(t *testing.T) {
tests := []struct {
dist string
want float64
wantErr error
}{
{"5mi", 5 * 1609.344, nil},
{"3", 3, nil},
{"3m", 3, nil},
{"5km", 5000, nil},
{"km", 0, &strconv.NumError{Func: "ParseFloat", Num: "", Err: strconv.ErrSyntax}},
{"", 0, &strconv.NumError{Func: "ParseFloat", Num: "", Err: strconv.ErrSyntax}},
}
for _, test := range tests {
got, err := ParseDistance(test.dist)
if !reflect.DeepEqual(err, test.wantErr) {
t.Errorf("expected err: %v, got %v for %s", test.wantErr, err, test.dist)
}
if got != test.want {
t.Errorf("expected distance %f got %f for %s", test.want, got, test.dist)
}
}
}
func TestParseDistanceUnit(t *testing.T) {
tests := []struct {
dist string
want float64
wantErr error
}{
{"mi", 1609.344, nil},
{"m", 1, nil},
{"km", 1000, nil},
{"", 0, fmt.Errorf("unknown distance unit: ")},
{"kam", 0, fmt.Errorf("unknown distance unit: kam")},
}
for _, test := range tests {
got, err := ParseDistanceUnit(test.dist)
if !reflect.DeepEqual(err, test.wantErr) {
t.Errorf("expected err: %v, got %v for %s", test.wantErr, err, test.dist)
}
if got != test.want {
t.Errorf("expected distance %f got %f for %s", test.want, got, test.dist)
}
}
}
func TestHaversinDistance(t *testing.T) {
earthRadiusKMs := 6378.137
halfCircle := earthRadiusKMs * math.Pi
tests := []struct {
lon1 float64
lat1 float64
lon2 float64
lat2 float64
want float64
}{
{1, 1, math.NaN(), 1, math.NaN()},
{1, 1, 1, math.NaN(), math.NaN()},
{1, math.NaN(), 1, 1, math.NaN()},
{math.NaN(), 1, 1, 1, math.NaN()},
{0, 0, 0, 0, 0},
{-180, 0, -180, 0, 0},
{-180, 0, 180, 0, 0},
{180, 0, 180, 0, 0},
{0, 90, 0, 90, 0},
{-180, 90, -180, 90, 0},
{-180, 90, 180, 90, 0},
{180, 90, 180, 90, 0},
{0, 0, 180, 0, halfCircle},
{-74.0059731, 40.7143528, -74.0059731, 40.7143528, 0},
{-74.0059731, 40.7143528, -73.9844722, 40.759011, 5.286},
{-74.0059731, 40.7143528, -74.007819, 40.718266, 0.4621},
{-74.0059731, 40.7143528, -74.0088305, 40.7051157, 1.055},
{-74.0059731, 40.7143528, -74, 40.7247222, 1.258},
{-74.0059731, 40.7143528, -73.9962255, 40.731033, 2.029},
{-74.0059731, 40.7143528, -73.95, 40.65, 8.572},
}
for _, test := range tests {
got := Haversin(test.lon1, test.lat1, test.lon2, test.lat2)
if math.IsNaN(test.want) && !math.IsNaN(got) {
t.Errorf("expected NaN, got %f", got)
}
if !math.IsNaN(test.want) && math.Abs(got-test.want) > 1E-2 {
t.Errorf("expected %f got %f", test.want, got)
}
}
}
|
