57 lines
1.5 KiB
TypeScript
57 lines
1.5 KiB
TypeScript
import { describe, expect, it } from "vitest";
|
|
import {
|
|
correctedDimensions,
|
|
isValidQuad,
|
|
moveQuadPoint,
|
|
polygonArea,
|
|
squareToQuad,
|
|
} from "../../src/scan/geometry";
|
|
import { DEFAULT_QUAD, type Quad } from "../../src/scan/types";
|
|
|
|
describe("document geometry", () => {
|
|
it("validates ordered convex quadrilaterals", () => {
|
|
expect(isValidQuad(DEFAULT_QUAD)).toBe(true);
|
|
expect(polygonArea(DEFAULT_QUAD)).toBe(1);
|
|
expect(
|
|
isValidQuad([
|
|
{ x: 0, y: 0 },
|
|
{ x: 1, y: 1 },
|
|
{ x: 1, y: 0 },
|
|
{ x: 0, y: 1 },
|
|
]),
|
|
).toBe(false);
|
|
});
|
|
|
|
it("rejects a dragged corner that would invert the page", () => {
|
|
expect(moveQuadPoint(DEFAULT_QUAD, 0, { x: 0.9, y: 0.9 })).toEqual(
|
|
DEFAULT_QUAD,
|
|
);
|
|
expect(moveQuadPoint(DEFAULT_QUAD, 0, { x: 0.1, y: 0.1 })[0]).toEqual({
|
|
x: 0.1,
|
|
y: 0.1,
|
|
});
|
|
});
|
|
|
|
it("maps every destination corner onto the selected source corner", () => {
|
|
const quad: Quad = [
|
|
{ x: 0.12, y: 0.08 },
|
|
{ x: 0.9, y: 0.16 },
|
|
{ x: 0.82, y: 0.94 },
|
|
{ x: 0.05, y: 0.8 },
|
|
];
|
|
const map = squareToQuad(quad);
|
|
expect(map(0, 0)).toEqual(quad[0]);
|
|
expect(map(1, 0).x).toBeCloseTo(quad[1].x);
|
|
expect(map(1, 1).y).toBeCloseTo(quad[2].y);
|
|
expect(map(0, 1).x).toBeCloseTo(quad[3].x);
|
|
});
|
|
|
|
it("preserves aspect and obeys the pixel budget", () => {
|
|
expect(correctedDimensions(DEFAULT_QUAD, 4000, 3000, 1_000_000)).toEqual({
|
|
width: 1154,
|
|
height: 866,
|
|
scale: expect.closeTo(Math.sqrt(1 / 12), 8),
|
|
});
|
|
});
|
|
});
|