func TestLinear(t *testing.T) {
l := Linear{Min: -10, Max: 10}
mathtest.WantFunc(t, fmt.Sprintf("%v.Map", l), l.Map,
map[float64]float64{
-20: -0.5,
-10: 0,
0: 0.5,
10: 1,
20: 1.5,
})
mathtest.WantFunc(t, fmt.Sprintf("%v.Unmap", l), l.Unmap,
map[float64]float64{
-0.5: -20,
0: -10,
0.5: 0,
1: 10,
1.5: 20,
})
l.SetClamp(true)
mathtest.WantFunc(t, fmt.Sprintf("%v.Map", l), l.Map,
map[float64]float64{
-20: 0,
-10: 0,
0: 0.5,
10: 1,
20: 1,
})
mathtest.WantFunc(t, fmt.Sprintf("%v.Unmap", l), l.Unmap,
map[float64]float64{
0: -10,
0.5: 0,
1: 10,
})
l = Linear{Min: 5, Max: 5}
mathtest.WantFunc(t, fmt.Sprintf("%v.Map", l), l.Map,
map[float64]float64{
-10: 0.5,
0: 0.5,
10: 0.5,
})
mathtest.WantFunc(t, fmt.Sprintf("%v.Unmap", l), l.Unmap,
map[float64]float64{
0: 5,
0.5: 5,
1: 5,
})
}
func TestLog(t *testing.T) {
l, err := NewLog(0, 10, 10)
if _, ok := err.(RangeErr); !ok {
t.Errorf("want RangeErr; got %v", err)
}
l, err = NewLog(-10, 0, 10)
if _, ok := err.(RangeErr); !ok {
t.Errorf("want RangeErr; got %v", err)
}
l, err = NewLog(-10, 10, 10)
if _, ok := err.(RangeErr); !ok {
t.Errorf("want RangeErr; got %v", err)
}
l, err = NewLog(10, 20, 0)
if _, ok := err.(RangeErr); !ok {
t.Errorf("want RangeErr; got %v", err)
}
l, _ = NewLog(1, 10, 10)
mathtest.WantFunc(t, fmt.Sprintf("%v.Map", l), l.Map,
map[float64]float64{
-1: math.NaN(),
0: math.NaN(),
0.1: -1,
1: 0,
math.Pow(10, 0.5): 0.5,
10: 1,
100: 2,
})
mathtest.WantFunc(t, fmt.Sprintf("%v.Unmap", l), l.Unmap,
map[float64]float64{
-1: 0.1,
0: 1,
0.5: math.Pow(10, 0.5),
1: 10,
2: 100,
})
l.SetClamp(true)
mathtest.WantFunc(t, fmt.Sprintf("%v.Map", l), l.Map,
map[float64]float64{
-1: math.NaN(),
0: math.NaN(),
0.1: 0,
1: 0,
math.Pow(10, 0.5): 0.5,
10: 1,
100: 1,
})
mathtest.WantFunc(t, fmt.Sprintf("%v.Unmap", l), l.Unmap,
map[float64]float64{
0: 1,
0.5: math.Pow(10, 0.5),
1: 10,
})
l, _ = NewLog(-1, -10, 10)
mathtest.WantFunc(t, fmt.Sprintf("%v.Map", l), l.Map,
map[float64]float64{
1: math.NaN(),
0: math.NaN(),
-0.1: 2,
-1: 1,
-math.Pow(10, 0.5): 0.5,
-10: 0,
-100: -1,
})
mathtest.WantFunc(t, fmt.Sprintf("%v.Unmap", l), l.Unmap,
map[float64]float64{
2: -0.1,
1: -1,
0.5: -math.Pow(10, 0.5),
0: -10,
-1: -100,
})
l, _ = NewLog(5, 5, 10)
mathtest.WantFunc(t, fmt.Sprintf("%v.Map", l), l.Map,
map[float64]float64{
-1: math.NaN(),
0: math.NaN(),
1: 0.5,
10: 0.5,
})
mathtest.WantFunc(t, fmt.Sprintf("%v.Unmap", l), l.Unmap,
map[float64]float64{
0: 5,
0.5: 5,
1: 5,
})
}