yippee.fun
Precise DOM morphing
morphing
typescript
dom
More svg tests
joel.drapper.me
+262
+262
test/new/svg.browser.test.ts
+262
test/new/svg.browser.test.ts
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import { describe, expect, test, beforeEach, afterEach } from "vitest"
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import { morph, morphInner } from "../../src/morphlex"
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import { observeMutations } from "./utils"
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describe("SVG morphing", () => {
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let container: HTMLElement
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beforeEach(() => {
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container = document.createElement("div")
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document.body.appendChild(container)
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})
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afterEach(() => {
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document.body.removeChild(container)
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})
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function svg(html: string): SVGElement {
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const tmp = document.createElement("div")
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tmp.innerHTML = html.trim()
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return tmp.firstChild as SVGElement
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}
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test("should morph SVG attributes", () => {
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const from = svg('<svg width="100" height="100" viewBox="0 0 100 100"></svg>')
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container.appendChild(from)
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const to = svg('<svg width="200" height="200" viewBox="0 0 200 200"></svg>')
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morph(from, to)
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expect(from.getAttribute("width")).toBe("200")
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expect(from.getAttribute("height")).toBe("200")
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expect(from.getAttribute("viewBox")).toBe("0 0 200 200")
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})
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test("should add new SVG children", () => {
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const from = svg('<svg><circle cx="50" cy="50" r="40"></circle></svg>')
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container.appendChild(from)
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const to = svg(`
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<svg>
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<circle cx="50" cy="50" r="40"></circle>
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<rect x="10" y="10" width="30" height="30"></rect>
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</svg>
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`)
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const mutations = observeMutations(from, () => morph(from, to))
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expect(from.children.length).toBe(2)
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expect(from.children[0].tagName).toBe("circle")
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expect(from.children[1].tagName).toBe("rect")
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expect(from.children[1].getAttribute("x")).toBe("10")
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expect(from.children[1].getAttribute("y")).toBe("10")
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expect(mutations.elementsAdded).toBe(1)
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})
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test("should remove SVG children", () => {
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const from = svg(`
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<svg>
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<circle cx="25" cy="25" r="20"></circle>
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<circle cx="75" cy="75" r="20"></circle>
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</svg>
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`)
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container.appendChild(from)
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const to = svg('<svg><circle cx="25" cy="25" r="20"></circle></svg>')
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const mutations = observeMutations(from, () => morph(from, to))
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expect(from.children.length).toBe(1)
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expect(from.children[0].getAttribute("cx")).toBe("25")
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expect(mutations.elementsRemoved).toBe(1)
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})
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test("should morph SVG paths", () => {
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const from = svg('<svg><path d="M 10 10 L 90 90" stroke="black"></path></svg>')
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container.appendChild(from)
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const to = svg('<svg><path d="M 10 10 C 20 20, 40 20, 50 10" stroke="red" stroke-width="2"></path></svg>')
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const mutations = observeMutations(from, () => morph(from, to))
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const morphedPath = from.querySelector("path")
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expect(morphedPath?.getAttribute("d")).toBe("M 10 10 C 20 20, 40 20, 50 10")
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expect(morphedPath?.getAttribute("stroke")).toBe("red")
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expect(morphedPath?.getAttribute("stroke-width")).toBe("2")
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expect(mutations.attributeChanges).toBeGreaterThan(0)
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})
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test("should morph nested SVG groups", () => {
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const from = svg(`
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<svg>
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<g transform="translate(10, 10)">
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<circle r="5"></circle>
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</g>
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</svg>
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`)
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container.appendChild(from)
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const to = svg(`
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<svg>
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<g transform="translate(20, 20) rotate(45)">
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<circle r="5"></circle>
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<circle r="10"></circle>
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</g>
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</svg>
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`)
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const mutations = observeMutations(from, () => morph(from, to))
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const morphedG = from.querySelector("g")
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expect(morphedG?.getAttribute("transform")).toBe("translate(20, 20) rotate(45)")
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expect(morphedG?.children.length).toBe(2)
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expect(morphedG?.children[1].getAttribute("r")).toBe("10")
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expect(mutations.elementsAdded).toBe(1)
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})
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test("should morph SVG text elements", () => {
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const from = svg('<svg><text x="10" y="20">Hello</text></svg>')
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container.appendChild(from)
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const to = svg('<svg><text x="30" y="40" font-size="20">World</text></svg>')
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morph(from, to)
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const morphedText = from.querySelector("text")
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expect(morphedText?.getAttribute("x")).toBe("30")
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expect(morphedText?.getAttribute("y")).toBe("40")
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expect(morphedText?.getAttribute("font-size")).toBe("20")
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expect(morphedText?.textContent).toBe("World")
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})
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test("should reorder SVG elements with IDs", () => {
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const from = svg(`
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<svg>
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<circle id="circle-1" cx="25"></circle>
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<circle id="circle-2" cx="50"></circle>
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<circle id="circle-3" cx="75"></circle>
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</svg>
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`)
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container.appendChild(from)
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const to = svg(`
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<svg>
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<circle id="circle-3" cx="75"></circle>
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<circle id="circle-1" cx="25"></circle>
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<circle id="circle-2" cx="50"></circle>
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</svg>
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`)
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morph(from, to)
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expect(from.children[0].id).toBe("circle-3")
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expect(from.children[1].id).toBe("circle-1")
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expect(from.children[2].id).toBe("circle-2")
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})
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test("should morph SVG polygons and polylines", () => {
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const from = svg('<svg><polygon points="10,10 20,10 15,20"></polygon></svg>')
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container.appendChild(from)
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const to = svg('<svg><polyline points="10,10 20,20 30,10 40,20" fill="none" stroke="blue"></polyline></svg>')
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morph(from, to)
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expect(from.children[0].tagName).toBe("polyline")
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expect(from.children[0].getAttribute("points")).toBe("10,10 20,20 30,10 40,20")
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expect(from.children[0].getAttribute("stroke")).toBe("blue")
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})
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test("should morph SVG with multiple shape types", () => {
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const from = svg(`
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<svg>
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<rect x="0"></rect>
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<ellipse cx="50"></ellipse>
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</svg>
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`)
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container.appendChild(from)
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const to = svg(`
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<svg>
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<circle cx="25"></circle>
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<line x1="0" y1="0" x2="100" y2="100"></line>
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<rect x="10"></rect>
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</svg>
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`)
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morph(from, to)
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expect(from.children.length).toBe(3)
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expect(from.children[0].tagName).toBe("circle")
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expect(from.children[1].tagName).toBe("line")
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expect(from.children[2].tagName).toBe("rect")
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})
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test("should preserve SVG namespace when creating new elements", () => {
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const from = svg("<svg></svg>")
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container.appendChild(from)
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const to = svg('<svg><circle r="50"></circle></svg>')
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morph(from, to)
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const morphedCircle = from.children[0]
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expect(morphedCircle.namespaceURI).toBe("http://www.w3.org/2000/svg")
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expect(morphedCircle.tagName).toBe("circle")
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})
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test("should morph SVG defs and use elements", () => {
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const from = svg(`
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<svg>
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<defs>
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<circle id="myCircle" r="10"></circle>
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</defs>
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</svg>
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`)
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container.appendChild(from)
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const to = svg(`
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<svg>
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<defs>
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<circle id="myCircle" r="20"></circle>
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</defs>
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<use href="#myCircle"></use>
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</svg>
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`)
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const mutations = observeMutations(from, () => morph(from, to))
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expect(from.children.length).toBe(2)
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expect(from.children[0].tagName).toBe("defs")
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expect(from.children[1].tagName).toBe("use")
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const defsCircle = from.children[0].children[0]
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expect(defsCircle.getAttribute("r")).toBe("20")
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expect(mutations.elementsAdded).toBe(1)
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})
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test("should morph SVG with class attributes", () => {
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const from = svg('<svg><circle class="small red"></circle></svg>')
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container.appendChild(from)
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const to = svg('<svg><circle class="large blue"></circle></svg>')
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morph(from, to)
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const morphedCircle = from.querySelector("circle")
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expect(morphedCircle?.getAttribute("class")).toBe("large blue")
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})
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test("should morph inner content of SVG element", () => {
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const from = svg('<svg><circle r="10"></circle></svg>')
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container.appendChild(from)
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const to = svg('<svg><rect width="20" height="20"></rect></svg>')
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morphInner(from, to)
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expect(from.children.length).toBe(1)
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expect(from.children[0].tagName).toBe("rect")
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expect(from.children[0].getAttribute("width")).toBe("20")
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})
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})