-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathvector_test.go
121 lines (97 loc) · 2.92 KB
/
vector_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
package vector
import (
"math"
"testing"
"github.com/stretchr/testify/assert"
)
func TestNewVector(t *testing.T) {
v1 := NewVector(1, 2)
assert.Equal(t, 2, v1.Dimension())
assert.Equal(t, []float64{1, 2}, v1.ToFloat64Array())
v2 := NewVector(-5, 3, 1, 7)
assert.Equal(t, 4, v2.Dimension())
assert.Equal(t, []float64{-5, 3, 1, 7}, v2.ToFloat64Array())
assert.Panics(t, func() { NewVector(1) })
assert.Panics(t, func() { NewVector() })
}
func TestNewVectorFromFloat64Array(t *testing.T) {
v1 := NewVectorFromFloat64Array([]float64{1, 2})
assert.Equal(t, 2, v1.Dimension())
assert.Equal(t, []float64{1, 2}, v1.ToFloat64Array())
v2 := NewVectorFromFloat64Array([]float64{-5, 3, 1, 7})
assert.Equal(t, 4, v2.Dimension())
assert.Equal(t, []float64{-5, 3, 1, 7}, v2.ToFloat64Array())
assert.Panics(t, func() { NewVectorFromFloat64Array([]float64{1}) })
assert.Panics(t, func() { NewVectorFromFloat64Array(nil) })
}
func TestVector_Dimension(t *testing.T) {
v1 := NewVector(-1, 3)
v2 := NewVector(-5, 4, 7)
v3 := NewVector(-3, 2, 5, 10)
assert.Equal(t, 2, v1.Dimension())
assert.Equal(t, 3, v2.Dimension())
assert.Equal(t, 4, v3.Dimension())
}
func TestVector_ToFloat64Array(t *testing.T) {
v1 := NewVector(-1, 3)
v2 := NewVector(-5, 4, 7)
v3 := NewVector(-3, 2, 5, 10)
assert.Equal(t, []float64{-1, 3}, v1.ToFloat64Array())
assert.Equal(t, []float64{-5, 4, 7}, v2.ToFloat64Array())
assert.Equal(t, []float64{-3, 2, 5, 10}, v3.ToFloat64Array())
}
func TestVector_Length(t *testing.T) {
v1 := NewVector(2, 4)
assert.Equal(t, 4.4721, math.Round(v1.Length()*10000)/10000)
}
func TestVector_Add(t *testing.T) {
v1 := NewVector(1, -5)
v2 := NewVector(8, 4)
assert.Equal(t, NewVector(9, -1), v1.Add(v2))
assert.Panics(t, func() {
v1 := NewVector(1, 2)
v2 := NewVector(3, 4, 5)
v1.Add(v2)
})
}
func TestVector_Subtract(t *testing.T) {
v1 := NewVector(1, -3)
v2 := NewVector(-6, 6)
assert.Equal(t, NewVector(7, -9), v1.Subtract(v2))
assert.Panics(t, func() {
v1 := NewVector(1, 2)
v2 := NewVector(3, 4, 5)
v1.Subtract(v2)
})
}
func TestVector_ScalarMultiply(t *testing.T) {
v1 := NewVector(-1, -3)
v2 := NewVector(-2, 3)
v3 := NewVector(8, 4)
assert.Equal(t, NewVector(-6, -18), v1.ScalarMultiply(6))
assert.Equal(t, NewVector(10, -15), v2.ScalarMultiply(-5))
assert.Equal(t, NewVector(2, 1), v3.ScalarMultiply(0.25))
}
func TestVector_DotProduct(t *testing.T) {
v1 := NewVector(2, 5)
v2 := NewVector(7, 1)
assert.Equal(t, float64(19), v1.DotProduct(v2))
v3 := NewVector(1, 2, 3)
v4 := NewVector(-2, 0, 5)
assert.Equal(t, float64(13), v3.DotProduct(v4))
assert.Panics(t, func() {
v1 := NewVector(1, 2)
v2 := NewVector(3, 4, 5)
v1.DotProduct(v2)
})
}
func TestVector_CrossProduct(t *testing.T) {
v1 := NewVector(1, -7, 1)
v2 := NewVector(5, 2, 4)
assert.Equal(t, NewVector(-30, 1, 37), v1.CrossProduct(v2))
assert.Panics(t, func() {
v1 := NewVector(1, 2)
v2 := NewVector(3, 4)
v1.CrossProduct(v2)
})
}