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
| import { mapKonvaBrightness } from "../image";
|
| describe("mapKonvaBrightness", () => {
| describe("linear range (0% - 100%)", () => {
| it.each([
| [0, -1],
| [25, -0.75],
| [50, -0.5],
| [75, -0.25],
| [100, 0],
| ])("maps %d%% brightness to %f", (input, expected) => {
| expect(mapKonvaBrightness(input)).toBeCloseTo(expected, 4);
| });
| });
|
| describe("non-linear range (100% - 400%)", () => {
| it.each([
| [150, Math.sqrt(50 / 300) * 0.8],
| [200, Math.sqrt(100 / 300) * 0.8],
| [250, Math.sqrt(150 / 300) * 0.8],
| [300, Math.sqrt(200 / 300) * 0.8],
| [350, Math.sqrt(250 / 300) * 0.8],
| [400, Math.sqrt(300 / 300) * 0.8], // = 0.8
| ])("maps %d%% brightness correctly", (input, expected) => {
| expect(mapKonvaBrightness(input)).toBeCloseTo(expected, 4);
| });
| });
|
| describe("general characteristics", () => {
| it("returns a finite number for a wide range of inputs", () => {
| for (let i = 0; i <= 400; i += 10) {
| const result = mapKonvaBrightness(i);
| expect(typeof result).toBe("number");
| expect(Number.isFinite(result)).toBe(true);
| }
| });
|
| it("returns 0 at exactly 100%", () => {
| expect(mapKonvaBrightness(100)).toBe(0);
| });
|
| it("returns maximum value 0.8 at 400%", () => {
| expect(mapKonvaBrightness(400)).toBeCloseTo(0.8, 4);
| });
| });
| });
|
|
