scale_test.go RawHistoryFolder

1package core
2
3import (
4	"reflect"
5	"testing"
6)
7
8func TestCleanScales(t *testing.T) {
9	for _, tc := range []struct {
10		w, h int
11		want []float64
12	}{
13		{5120, 2160, []float64{1, 1.25, 4.0 / 3, 1.6, 5.0 / 3, 2, 2.5, 8.0 / 3}},
14		{3840, 2160, []float64{1, 1.2, 1.25, 4.0 / 3, 1.5, 1.6, 5.0 / 3, 1.875, 2, 2.4, 2.5, 8.0 / 3, 3}},
15	} {
16		if got := CleanScales(tc.w, tc.h); !reflect.DeepEqual(got, tc.want) {
17			t.Errorf("%dx%d: %v", tc.w, tc.h, got)
18		}
19	}
20}
21
22func TestStepScale(t *testing.T) {
23	if s := StepScale(5120, 2160, 1, 1); s != 1.25 {
24		t.Fatal(s)
25	}
26	// 1.5 is not clean on 5K: up goes to 1.6, down to 4/3.
27	if s := StepScale(5120, 2160, 1.5, 1); s != 1.6 {
28		t.Fatal(s)
29	}
30	if s := StepScale(5120, 2160, 1.5, -1); s != 4.0/3 {
31		t.Fatal(s)
32	}
33	if s := StepScale(5120, 2160, 1, -1); s != 1 {
34		t.Fatal(s)
35	}
36	if s := StepScale(1920, 1080, 3, 1); s != 3 {
37		t.Fatal(s)
38	}
39}
40
41func TestSnapScale(t *testing.T) {
42	for in, want := range map[float64]float64{0: 1, -2: 1, 1.5: 1.5, 1.3333: 160.0 / 120, 9: 4} {
43		if got := SnapScale(in); got != want {
44			t.Errorf("%v: %v", in, got)
45		}
46	}
47}