90 lines
2.5 KiB
TypeScript
90 lines
2.5 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import {
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createTransformPlan,
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normalizeCrop,
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orientedDimensions,
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} from "../../src/image/geometry";
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import { DEFAULT_RECIPE } from "../../src/image/types";
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describe("image transform geometry", () => {
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it("swaps dimensions for transpose orientations", () => {
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expect(orientedDimensions(400, 300, 6)).toEqual({
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width: 300,
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height: 400,
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});
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expect(orientedDimensions(400, 300, 3)).toEqual({
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width: 400,
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height: 300,
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});
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});
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it("plans orientation-relative crop and quarter turn", () => {
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const plan = createTransformPlan(
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{ orientedWidth: 1000, orientedHeight: 800 },
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{
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...DEFAULT_RECIPE,
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crop: { x: 0.1, y: 0.25, width: 0.5, height: 0.5 },
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rotation: 90,
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},
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);
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expect(plan.crop).toEqual({ x: 100, y: 200, width: 500, height: 400 });
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expect([plan.transformedWidth, plan.transformedHeight]).toEqual([400, 500]);
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});
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it("fits without changing aspect ratio", () => {
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const plan = createTransformPlan(
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{ orientedWidth: 4000, orientedHeight: 3000 },
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{ ...DEFAULT_RECIPE, resize: { mode: "fit", width: 1000, height: 1000 } },
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);
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expect([plan.outputWidth, plan.outputHeight]).toEqual([1000, 750]);
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});
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it("center-crops fill while exact stretches", () => {
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const fill = createTransformPlan(
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{ orientedWidth: 4000, orientedHeight: 3000 },
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{
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...DEFAULT_RECIPE,
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resize: { mode: "fill", width: 1000, height: 1000 },
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},
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);
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expect(fill.resizeSource).toEqual({
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x: 500,
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y: 0,
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width: 3000,
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height: 3000,
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});
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expect([fill.outputWidth, fill.outputHeight]).toEqual([1000, 1000]);
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const exact = createTransformPlan(
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{ orientedWidth: 4000, orientedHeight: 3000 },
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{
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...DEFAULT_RECIPE,
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resize: { mode: "exact", width: 1000, height: 1000 },
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},
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);
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expect(exact.resizeSource).toEqual({
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x: 0,
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y: 0,
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width: 4000,
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height: 3000,
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});
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});
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it("clamps crop rectangles and rejects unsafe output", () => {
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expect(normalizeCrop({ x: -1, y: 0.9, width: 5, height: 0.5 })).toEqual({
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x: 0,
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y: 0.9,
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width: 1,
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height: 0.09999999999999998,
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});
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expect(() =>
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createTransformPlan(
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{ orientedWidth: 10, orientedHeight: 10 },
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{
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...DEFAULT_RECIPE,
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resize: { mode: "exact", width: 100_000, height: 100_000 },
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},
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),
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).toThrow(/may not exceed/u);
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});
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});
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