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animateScroll.test.mjs
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// @ts-check
import { throws } from "node:assert";
import playwright from "playwright";
import revertableGlobals from "revertable-globals";
import TestDirector from "test-director";
import animateScroll from "./animateScroll.mjs";
import assertBundleSize from "./test/assertBundleSize.mjs";
import playwrightBrowserNames from "./test/playwrightBrowserNames.mjs";
import testingPlaywrightPage from "./test/testingPlaywrightPage.mjs";
const packageDirectoryUrl = new URL(".", import.meta.url);
/**
* Adds `animateScroll` tests.
* @param {import("test-director").default} tests Test director.
* @param {URL} packageFilesOriginUrl Package files origin URL.
*/
export default (tests, packageFilesOriginUrl) => {
tests.add("`animateScroll` bundle size.", async () => {
await assertBundleSize(
new URL("./animateScroll.mjs", import.meta.url),
550
);
});
tests.add(
"`animateScroll` with option `container` not a `Element` instance.",
() => {
class Element {}
const revertGlobals = revertableGlobals({ Element });
try {
throws(() => {
animateScroll({
// @ts-expect-error Testing invalid.
container: true,
});
}, new TypeError("Option `container` must be a `Element` instance."));
} finally {
revertGlobals();
}
}
);
for (const playwrightBrowserName of playwrightBrowserNames)
tests.add(
`\`animateScroll\` within a \`${playwrightBrowserName}\` browser environment.`,
async () => {
const browser = await playwright[playwrightBrowserName].launch();
try {
const enableCoverage = playwrightBrowserName === "chromium";
const tests = new TestDirector();
tests.add(
"`animateScroll` with option `container` default, options `targetX` and `targetY` < maximums.",
async () => {
await testingPlaywrightPage(
browser,
packageDirectoryUrl,
packageFilesOriginUrl,
enableCoverage,
async (page) => {
await page.setContent(/* HTML */ `<!DOCTYPE html>
<html>
<head>
<style>
body {
margin: 0;
}
#padding {
padding: 200vh 200vw;
}
</style>
</head>
<body>
<div id="padding"></div>
</body>
</html>`);
await page.evaluate(async (packageFilesOriginHref) => {
/** @type {import("./animateScroll.mjs")} */
const { default: animateScroll, durationDefault } =
await import(
`${packageFilesOriginHref}animateScroll.mjs`
);
const scrollingElement = /** @type {Element} */ (
document.scrollingElement
);
// < the maximum.
const targetX = 50;
// < the maximum.
const targetY = 100;
animateScroll({ targetX, targetY });
await new Promise((resolve) =>
setTimeout(
resolve,
// Half the scroll animation duration.
durationDefault / 2
)
);
if (
!scrollingElement.scrollLeft ||
!scrollingElement.scrollTop
)
throw new Error(
`Should scroll during the scroll animation duration.`
);
await new Promise((resolve) =>
setTimeout(
resolve,
// The remaining scroll animation duration.
durationDefault / 2 +
// Extra time for scroll animation end code to run.
20
)
);
if (scrollingElement.scrollLeft !== targetX)
throw new Error("Incorrect final scroll left position.");
if (scrollingElement.scrollTop !== targetY)
throw new Error("Incorrect final scroll top position.");
}, packageFilesOriginUrl.href);
}
);
}
);
tests.add(
"`animateScroll` with option `container` an element, options `targetX` and `targetY` < maximums.",
async () => {
await testingPlaywrightPage(
browser,
packageDirectoryUrl,
packageFilesOriginUrl,
enableCoverage,
async (page) => {
await page.setContent(/* HTML */ `<!DOCTYPE html>
<html>
<head>
<style>
#scrolling-element {
width: 1000px;
height: 1000px;
overflow: auto;
}
#padding {
width: 200%;
height: 200%;
}
</style>
</head>
<body>
<div id="scrolling-element">
<div id="padding"></div>
</div>
</body>
</html>`);
await page.evaluate(async (packageFilesOriginHref) => {
/** @type {import("./animateScroll.mjs")} */
const { default: animateScroll, durationDefault } =
await import(
`${packageFilesOriginHref}animateScroll.mjs`
);
const scrollingElement = /** @type {HTMLDivElement} */ (
document.getElementById("scrolling-element")
);
// < the maximum.
const targetX = 400;
// < the maximum.
const targetY = 600;
animateScroll({
container: scrollingElement,
targetX,
targetY,
});
await new Promise((resolve) =>
setTimeout(
resolve,
// Half the scroll animation duration.
durationDefault / 2
)
);
if (
!scrollingElement.scrollLeft ||
!scrollingElement.scrollTop
)
throw new Error(
`Should scroll during the scroll animation duration.`
);
await new Promise((resolve) =>
setTimeout(
resolve,
// The remaining scroll animation duration.
durationDefault / 2 +
// Extra time for scroll animation end code to run.
20
)
);
if (scrollingElement.scrollLeft !== targetX)
throw new Error("Incorrect final scroll left position.");
if (scrollingElement.scrollTop !== targetY)
throw new Error("Incorrect final scroll top position.");
}, packageFilesOriginUrl.href);
}
);
}
);
tests.add(
"`animateScroll` with option `container` an element, option `targetX` < maximum.",
async () => {
await testingPlaywrightPage(
browser,
packageDirectoryUrl,
packageFilesOriginUrl,
enableCoverage,
async (page) => {
await page.setContent(/* HTML */ `<!DOCTYPE html>
<html>
<head>
<style>
#scrolling-element {
width: 1000px;
height: 1000px;
overflow: auto;
}
#padding {
width: 200%;
height: 200%;
}
</style>
</head>
<body>
<div id="scrolling-element">
<div id="padding"></div>
</div>
</body>
</html>`);
await page.evaluate(async (packageFilesOriginHref) => {
/** @type {import("./animateScroll.mjs")} */
const { default: animateScroll, durationDefault } =
await import(
`${packageFilesOriginHref}animateScroll.mjs`
);
const scrollingElement = /** @type {HTMLDivElement} */ (
document.getElementById("scrolling-element")
);
// Arbitrary.
const scrollTop = 20;
scrollingElement.scrollTop = scrollTop;
// < the maximum.
const targetX = 100;
animateScroll({
container: scrollingElement,
targetX,
});
await new Promise((resolve) =>
setTimeout(
resolve,
// Half the scroll animation duration.
durationDefault / 2
)
);
if (!scrollingElement.scrollLeft)
throw new Error(
`Should scroll during the scroll animation duration.`
);
await new Promise((resolve) =>
setTimeout(
resolve,
// The remaining scroll animation duration.
durationDefault / 2 +
// Extra time for scroll animation end code to run.
20
)
);
if (scrollingElement.scrollLeft !== targetX)
throw new Error("Incorrect final scroll left position.");
if (scrollingElement.scrollTop !== scrollTop)
throw new Error("Shouldn’t have scrolled vertically.");
}, packageFilesOriginUrl.href);
}
);
}
);
tests.add(
"`animateScroll` with option `container` an element, option `targetX` > maximum.",
async () => {
await testingPlaywrightPage(
browser,
packageDirectoryUrl,
packageFilesOriginUrl,
enableCoverage,
async (page) => {
await page.setContent(/* HTML */ `<!DOCTYPE html>
<html>
<head>
<style>
#scrolling-element {
width: 1000px;
height: 1000px;
overflow: auto;
}
#padding {
width: 200%;
height: 200%;
}
</style>
</head>
<body>
<div id="scrolling-element">
<div id="padding"></div>
</div>
</body>
</html>`);
await page.evaluate(async (packageFilesOriginHref) => {
/** @type {import("./animateScroll.mjs")} */
const { default: animateScroll, durationDefault } =
await import(
`${packageFilesOriginHref}animateScroll.mjs`
);
const scrollingElement = /** @type {HTMLDivElement} */ (
document.getElementById("scrolling-element")
);
// Arbitrary.
const scrollTop = 20;
scrollingElement.scrollTop = scrollTop;
// > the maximum.
const targetX = 3000;
animateScroll({
container: scrollingElement,
targetX,
});
await new Promise((resolve) =>
setTimeout(
resolve,
// Half the scroll animation duration.
durationDefault / 2
)
);
if (!scrollingElement.scrollLeft)
throw new Error(
`Should scroll during the scroll animation duration.`
);
await new Promise((resolve) =>
setTimeout(
resolve,
// The remaining scroll animation duration.
durationDefault / 2 +
// Extra time for scroll animation end code to run.
20
)
);
if (scrollingElement.scrollLeft !== 1000)
throw new Error(
"Container should’ve scrolled all the way horizontally."
);
if (scrollingElement.scrollTop !== scrollTop)
throw new Error("Shouldn’t have scrolled vertically.");
}, packageFilesOriginUrl.href);
}
);
}
);
tests.add(
"`animateScroll` with option `container` an element, option `targetY` < maximum.",
async () => {
await testingPlaywrightPage(
browser,
packageDirectoryUrl,
packageFilesOriginUrl,
enableCoverage,
async (page) => {
await page.setContent(/* HTML */ `<!DOCTYPE html>
<html>
<head>
<style>
#scrolling-element {
width: 1000px;
height: 1000px;
overflow: auto;
}
#padding {
width: 200%;
height: 200%;
}
</style>
</head>
<body>
<div id="scrolling-element">
<div id="padding"></div>
</div>
</body>
</html>`);
await page.evaluate(async (packageFilesOriginHref) => {
/** @type {import("./animateScroll.mjs")} */
const { default: animateScroll, durationDefault } =
await import(
`${packageFilesOriginHref}animateScroll.mjs`
);
const scrollingElement = /** @type {HTMLDivElement} */ (
document.getElementById("scrolling-element")
);
// Arbitrary.
const scrollLeft = 20;
scrollingElement.scrollLeft = scrollLeft;
// < the maximum.
const targetY = 100;
animateScroll({
container: scrollingElement,
targetY,
});
await new Promise((resolve) =>
setTimeout(
resolve,
// Half the scroll animation duration.
durationDefault / 2
)
);
if (!scrollingElement.scrollTop)
throw new Error(
`Should scroll during the scroll animation duration.`
);
await new Promise((resolve) =>
setTimeout(
resolve,
// The remaining scroll animation duration.
durationDefault / 2 +
// Extra time for scroll animation end code to run.
20
)
);
if (scrollingElement.scrollLeft !== scrollLeft)
throw new Error("Shouldn’t have scrolled horizontally.");
if (scrollingElement.scrollTop !== targetY)
throw new Error("Incorrect final scroll top position.");
}, packageFilesOriginUrl.href);
}
);
}
);
tests.add(
"`animateScroll` with option `container` an element, option `targetY` > maximum.",
async () => {
await testingPlaywrightPage(
browser,
packageDirectoryUrl,
packageFilesOriginUrl,
enableCoverage,
async (page) => {
await page.setContent(/* HTML */ `<!DOCTYPE html>
<html>
<head>
<style>
#scrolling-element {
width: 1000px;
height: 1000px;
overflow: auto;
}
#padding {
width: 200%;
height: 200%;
}
</style>
</head>
<body>
<div id="scrolling-element">
<div id="padding"></div>
</div>
</body>
</html>`);
await page.evaluate(async (packageFilesOriginHref) => {
/** @type {import("./animateScroll.mjs")} */
const { default: animateScroll, durationDefault } =
await import(
`${packageFilesOriginHref}animateScroll.mjs`
);
const scrollingElement = /** @type {HTMLDivElement} */ (
document.getElementById("scrolling-element")
);
// Arbitrary.
const scrollLeft = 20;
scrollingElement.scrollLeft = scrollLeft;
// > the maximum.
const targetY = 3000;
animateScroll({
container: scrollingElement,
targetY,
});
await new Promise((resolve) =>
setTimeout(
resolve,
// Half the scroll animation duration.
durationDefault / 2
)
);
if (!scrollingElement.scrollTop)
throw new Error(
`Should scroll during the scroll animation duration.`
);
await new Promise((resolve) =>
setTimeout(
resolve,
// The remaining scroll animation duration.
durationDefault / 2 +
// Extra time for scroll animation end code to run.
20
)
);
if (scrollingElement.scrollLeft !== scrollLeft)
throw new Error("Shouldn’t have scrolled horizontally.");
if (scrollingElement.scrollTop !== 1000)
throw new Error(
"Container should’ve scrolled to the end vertically."
);
}, packageFilesOriginUrl.href);
}
);
}
);
tests.add(
"`animateScroll` with option `container` an element, option `targetX` < maximum, option `offsetX` negative.",
async () => {
await testingPlaywrightPage(
browser,
packageDirectoryUrl,
packageFilesOriginUrl,
enableCoverage,
async (page) => {
await page.setContent(/* HTML */ `<!DOCTYPE html>
<html>
<head>
<style>
#scrolling-element {
width: 1000px;
height: 1000px;
overflow: auto;
}
#padding {
width: 200%;
height: 200%;
}
</style>
</head>
<body>
<div id="scrolling-element">
<div id="padding"></div>
</div>
</body>
</html>`);
await page.evaluate(async (packageFilesOriginHref) => {
/** @type {import("./animateScroll.mjs")} */
const { default: animateScroll, durationDefault } =
await import(
`${packageFilesOriginHref}animateScroll.mjs`
);
const scrollingElement = /** @type {HTMLDivElement} */ (
document.getElementById("scrolling-element")
);
// Arbitrary.
const scrollTop = 20;
scrollingElement.scrollTop = scrollTop;
// < the maximum.
const targetX = 100;
// Negative.
const offsetX = -10;
animateScroll({
container: scrollingElement,
targetX,
offsetX,
});
await new Promise((resolve) =>
setTimeout(
resolve,
// Half the scroll animation duration.
durationDefault / 2
)
);
if (!scrollingElement.scrollLeft)
throw new Error(
`Should scroll during the scroll animation duration.`
);
await new Promise((resolve) =>
setTimeout(
resolve,
// The remaining scroll animation duration.
durationDefault / 2 +
// Extra time for scroll animation end code to run.
20
)
);
if (scrollingElement.scrollLeft !== targetX + offsetX)
throw new Error("Incorrect final scroll left position.");
if (scrollingElement.scrollTop !== scrollTop)
throw new Error("Shouldn’t have scrolled vertically.");
}, packageFilesOriginUrl.href);
}
);
}
);
tests.add(
"`animateScroll` with option `container` an element, option `targetX` < maximum, option `offsetX` positive.",
async () => {
await testingPlaywrightPage(
browser,
packageDirectoryUrl,
packageFilesOriginUrl,
enableCoverage,
async (page) => {
await page.setContent(/* HTML */ `<!DOCTYPE html>
<html>
<head>
<style>
#scrolling-element {
width: 1000px;
height: 1000px;
overflow: auto;
}
#padding {
width: 200%;
height: 200%;
}
</style>
</head>
<body>
<div id="scrolling-element">
<div id="padding"></div>
</div>
</body>
</html>`);
await page.evaluate(async (packageFilesOriginHref) => {
/** @type {import("./animateScroll.mjs")} */
const { default: animateScroll, durationDefault } =
await import(
`${packageFilesOriginHref}animateScroll.mjs`
);
const scrollingElement = /** @type {HTMLDivElement} */ (
document.getElementById("scrolling-element")
);
// Arbitrary.
const scrollTop = 20;
scrollingElement.scrollTop = scrollTop;
// < the maximum, when the offset is added.
const targetX = 100;
// Positive.
const offsetX = 10;
animateScroll({
container: scrollingElement,
targetX,
offsetX,
});
await new Promise((resolve) =>
setTimeout(
resolve,
// Half the scroll animation duration.
durationDefault / 2
)
);
if (!scrollingElement.scrollLeft)
throw new Error(
`Should scroll during the scroll animation duration.`
);
await new Promise((resolve) =>
setTimeout(
resolve,
// The remaining scroll animation duration.
durationDefault / 2 +
// Extra time for scroll animation end code to run.
20
)
);
if (scrollingElement.scrollLeft !== targetX + offsetX)
throw new Error("Incorrect final scroll left position.");
if (scrollingElement.scrollTop !== scrollTop)
throw new Error("Shouldn’t have scrolled vertically.");
}, packageFilesOriginUrl.href);
}
);
}
);
tests.add(
"`animateScroll` with option `container` an element, option `targetX` > maximum, option `offsetX` negative.",
async () => {
await testingPlaywrightPage(
browser,
packageDirectoryUrl,
packageFilesOriginUrl,
enableCoverage,
async (page) => {
await page.setContent(/* HTML */ `<!DOCTYPE html>
<html>
<head>
<style>
#scrolling-element {
width: 1000px;
height: 1000px;
overflow: auto;
}
#padding {
width: 200%;
height: 200%;
}
</style>
</head>
<body>
<div id="scrolling-element">
<div id="padding"></div>
</div>
</body>
</html>`);
await page.evaluate(async (packageFilesOriginHref) => {
/** @type {import("./animateScroll.mjs")} */
const { default: animateScroll, durationDefault } =
await import(
`${packageFilesOriginHref}animateScroll.mjs`
);
const scrollingElement = /** @type {HTMLDivElement} */ (
document.getElementById("scrolling-element")
);
// Arbitrary.
const scrollTop = 20;
scrollingElement.scrollTop = scrollTop;
// > the maximum.
const targetX = 1100;
// Negative enough for the final scroll position to be > 0
// but < the maximum.
const offsetX = -200;
animateScroll({
container: scrollingElement,
targetX,
offsetX,
});
await new Promise((resolve) =>
setTimeout(
resolve,
// Half the scroll animation duration.
durationDefault / 2
)
);
if (!scrollingElement.scrollLeft)
throw new Error(
`Should scroll during the scroll animation duration.`
);
await new Promise((resolve) =>
setTimeout(
resolve,
// The remaining scroll animation duration.
durationDefault / 2 +
// Extra time for scroll animation end code to run.
20
)
);
if (scrollingElement.scrollLeft !== targetX + offsetX)
throw new Error("Incorrect final scroll left position.");
if (scrollingElement.scrollTop !== scrollTop)
throw new Error("Shouldn’t have scrolled vertically.");
}, packageFilesOriginUrl.href);
}
);
}
);
tests.add(
"`animateScroll` with option `container` an element, option `targetY` < maximum, option `offsetY` negative.",
async () => {
await testingPlaywrightPage(
browser,
packageDirectoryUrl,
packageFilesOriginUrl,
enableCoverage,
async (page) => {
await page.setContent(/* HTML */ `<!DOCTYPE html>
<html>
<head>
<style>
#scrolling-element {
width: 1000px;
height: 1000px;
overflow: auto;
}
#padding {
width: 200%;
height: 200%;
}
</style>
</head>
<body>
<div id="scrolling-element">
<div id="padding"></div>
</div>
</body>
</html>`);
await page.evaluate(async (packageFilesOriginHref) => {
/** @type {import("./animateScroll.mjs")} */
const { default: animateScroll, durationDefault } =
await import(
`${packageFilesOriginHref}animateScroll.mjs`
);
const scrollingElement = /** @type {HTMLDivElement} */ (
document.getElementById("scrolling-element")
);
// Arbitrary.
const scrollLeft = 20;
scrollingElement.scrollLeft = scrollLeft;
// < the maximum.
const targetY = 100;
// Negative.
const offsetY = -10;
animateScroll({
container: scrollingElement,
targetY,
offsetY,
});
await new Promise((resolve) =>
setTimeout(
resolve,
// Half the scroll animation duration.
durationDefault / 2
)
);
if (!scrollingElement.scrollTop)
throw new Error(
`Should scroll during the scroll animation duration.`
);
await new Promise((resolve) =>
setTimeout(
resolve,
// The remaining scroll animation duration.
durationDefault / 2 +
// Extra time for scroll animation end code to run.
20
)
);
if (scrollingElement.scrollLeft !== scrollLeft)
throw new Error(
"Container shouldn’t have scrolled horizontally."
);
if (scrollingElement.scrollTop !== targetY + offsetY)
throw new Error("Incorrect final scroll top position.");
}, packageFilesOriginUrl.href);
}
);
}
);
tests.add(
"`animateScroll` with option `container` an element, option `targetY` < maximum, option `offsetY` positive.",
async () => {
await testingPlaywrightPage(
browser,
packageDirectoryUrl,
packageFilesOriginUrl,
enableCoverage,
async (page) => {
await page.setContent(/* HTML */ `<!DOCTYPE html>
<html>
<head>
<style>
#scrolling-element {
width: 1000px;
height: 1000px;
overflow: auto;
}
#padding {
width: 200%;
height: 200%;
}
</style>