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Diffstat (limited to 'packages/excalidraw/tests/fitToContent.test.tsx')
| -rw-r--r-- | packages/excalidraw/tests/fitToContent.test.tsx | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/packages/excalidraw/tests/fitToContent.test.tsx b/packages/excalidraw/tests/fitToContent.test.tsx new file mode 100644 index 0000000..a4f0391 --- /dev/null +++ b/packages/excalidraw/tests/fitToContent.test.tsx @@ -0,0 +1,191 @@ +import React from "react"; +import { act, render } from "./test-utils"; +import { API } from "./helpers/api"; + +import { Excalidraw } from "../index"; +import { vi } from "vitest"; + +const { h } = window; + +const waitForNextAnimationFrame = () => { + return act( + () => + new Promise((resolve) => { + requestAnimationFrame(() => { + requestAnimationFrame(resolve); + }); + }), + ); +}; + +describe("fitToContent", () => { + it("should zoom to fit the selected element", async () => { + await render(<Excalidraw />); + + h.state.width = 10; + h.state.height = 10; + + const rectElement = API.createElement({ + width: 50, + height: 100, + x: 50, + y: 100, + }); + + expect(h.state.zoom.value).toBe(1); + + act(() => { + h.app.scrollToContent(rectElement, { fitToContent: true }); + }); + + // element is 10x taller than the viewport size, + // zoom should be at least 1/10 + expect(h.state.zoom.value).toBeLessThanOrEqual(0.1); + }); + + it("should zoom to fit multiple elements", async () => { + await render(<Excalidraw />); + + const topLeft = API.createElement({ + width: 20, + height: 20, + x: 0, + y: 0, + }); + + const bottomRight = API.createElement({ + width: 20, + height: 20, + x: 80, + y: 80, + }); + + h.state.width = 10; + h.state.height = 10; + + expect(h.state.zoom.value).toBe(1); + + act(() => { + h.app.scrollToContent([topLeft, bottomRight], { + fitToContent: true, + }); + }); + + // elements take 100x100, which is 10x bigger than the viewport size, + // zoom should be at least 1/10 + expect(h.state.zoom.value).toBeLessThanOrEqual(0.1); + }); + + it("should scroll the viewport to the selected element", async () => { + await render(<Excalidraw />); + + h.state.width = 10; + h.state.height = 10; + + const rectElement = API.createElement({ + width: 100, + height: 100, + x: 100, + y: 100, + }); + + expect(h.state.zoom.value).toBe(1); + expect(h.state.scrollX).toBe(0); + expect(h.state.scrollY).toBe(0); + + act(() => { + h.app.scrollToContent(rectElement); + }); + + // zoom level should stay the same + expect(h.state.zoom.value).toBe(1); + + // state should reflect some scrolling + expect(h.state.scrollX).not.toBe(0); + expect(h.state.scrollY).not.toBe(0); + }); +}); + +describe("fitToContent animated", () => { + beforeEach(() => { + vi.spyOn(window, "requestAnimationFrame"); + }); + + afterEach(() => { + vi.restoreAllMocks(); + }); + + it("should ease scroll the viewport to the selected element", async () => { + await render(<Excalidraw />); + + h.state.width = 10; + h.state.height = 10; + + const rectElement = API.createElement({ + width: 100, + height: 100, + x: -100, + y: -100, + }); + + act(() => { + h.app.scrollToContent(rectElement, { animate: true }); + }); + + expect(window.requestAnimationFrame).toHaveBeenCalled(); + + // Since this is an animation, we expect values to change through time. + // We'll verify that the scroll values change at 50ms and 100ms + expect(h.state.scrollX).toBe(0); + expect(h.state.scrollY).toBe(0); + + await waitForNextAnimationFrame(); + + const prevScrollX = h.state.scrollX; + const prevScrollY = h.state.scrollY; + + expect(h.state.scrollX).not.toBe(0); + expect(h.state.scrollY).not.toBe(0); + + await waitForNextAnimationFrame(); + + expect(h.state.scrollX).not.toBe(prevScrollX); + expect(h.state.scrollY).not.toBe(prevScrollY); + }); + + it("should animate the scroll but not the zoom", async () => { + await render(<Excalidraw />); + + h.state.width = 50; + h.state.height = 50; + + const rectElement = API.createElement({ + width: 100, + height: 100, + x: 100, + y: 100, + }); + + expect(h.state.scrollX).toBe(0); + expect(h.state.scrollY).toBe(0); + + act(() => { + h.app.scrollToContent(rectElement, { animate: true, fitToContent: true }); + }); + + expect(window.requestAnimationFrame).toHaveBeenCalled(); + + await waitForNextAnimationFrame(); + + const prevScrollX = h.state.scrollX; + const prevScrollY = h.state.scrollY; + + expect(h.state.scrollX).not.toBe(0); + expect(h.state.scrollY).not.toBe(0); + + await waitForNextAnimationFrame(); + + expect(h.state.scrollX).not.toBe(prevScrollX); + expect(h.state.scrollY).not.toBe(prevScrollY); + }); +}); |
