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1071 lines (1019 loc) · 47.7 KB
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<html lang="en">
<head>
<title>ssexi test suite</title>
<script>
let tests = [];
let currentTest = null;
let passed = 0;
let failed = 0;
let find = (selector) => currentTest.testElt.querySelector(selector);
function test(code){
let currentScript = document.currentScript;
let testElt = currentScript.closest('div');
tests.push(async ()=>{
currentTest.testElt = testElt;
try {
await code();
testElt.classList.add("passed");
testElt.insertAdjacentHTML('beforeend', `<p>Passed</p>`)
passed++;
document.querySelector(".passed-info").querySelector("output").innerText = passed.toString();
} catch (e) {
testElt.classList.add("failed");
testElt.insertAdjacentHTML('beforeend', `<p>ERROR: ${e}</p>`)
failed++;
document.querySelector(".failed-info").querySelector("output").innerText = failed.toString();
} finally {
currentTest = null;
}
})
}
function sleep(ms) {
return new Promise((resolve) => setTimeout(resolve, ms));
}
function assertEq(actual, expected, trim) {
if (expected !== (trim ? actual?.trim() : actual)) {
console.error("Expected", expected, "found", actual);
throw `Expected ${expected} found ${actual}`
}
}
function sseResponse(...messages) {
let body = messages.map(m => {
if (typeof m === 'string') return `data: ${m}\n\n`;
let out = '';
if (m.event) out += `event: ${m.event}\n`;
if (m.id) out += `id: ${m.id}\n`;
if (m.retry) out += `retry: ${m.retry}\n`;
let data = m.data || '';
data.split('\n').forEach(line => out += `data: ${line}\n`);
return out + '\n';
}).join('');
let encoder = new TextEncoder();
let stream = new ReadableStream({
start(controller) {
controller.enqueue(encoder.encode(body));
controller.close();
}
});
return new Response(stream, {headers: {'Content-Type': 'text/event-stream'}});
}
function chunkedSSEResponse(...messages) {
let chunks = messages.map(m => {
if (typeof m === 'string') return `data: ${m}\n\n`;
let out = '';
if (m.event) out += `event: ${m.event}\n`;
if (m.id) out += `id: ${m.id}\n`;
let data = m.data || '';
data.split('\n').forEach(line => out += `data: ${line}\n`);
return out + '\n';
});
let encoder = new TextEncoder();
let i = 0;
let stream = new ReadableStream({
pull(controller) {
if (i < chunks.length) controller.enqueue(encoder.encode(chunks[i++]));
else controller.close();
}
});
return new Response(stream, {headers: {'Content-Type': 'text/event-stream'}});
}
// disable view transitions during tests
document.addEventListener("fx:config", (e) => e.detail.cfg.transition = false);
document.addEventListener('DOMContentLoaded', async () => {
for (let i = 0; i < document.querySelectorAll(".test").length; i++){
const testBlock = document.querySelectorAll(".test")[i];
testBlock.querySelector("h3").insertAdjacentHTML("beforeend", ` - <a id='test${i}' href="test.html?test${i}">run</a>`)
let scriptElt = testBlock.querySelector("script");
scriptElt.insertAdjacentHTML("beforebegin", `<b>Code:</b><pre></pre>`)
scriptElt.previousElementSibling.innerText = scriptElt.innerText.replaceAll(/^ {8}/gm, '') + "\n";
if (location.search.indexOf("?test") === 0) {
let index = parseInt(location.search.substring(5));
if (index !== i) {
testBlock.setAttribute("fx-ignore", 'true');
} else {
testBlock.scrollIntoView()
}
}
}
setTimeout(async ()=>{
for (let i = 0; i < tests.length; i++){
if (location.search.indexOf("?test") === 0) {
let index = parseInt(location.search.substring(5));
if (index !== i) continue;
}
currentTest = tests[i];
await currentTest();
}
})
});
</script>
<script src="https://cdn.jsdelivr.net/gh/bigskysoftware/fixi@0.9.3/fixi.js"></script>
<script src="ssexi.js"></script>
<style>
.test {
padding: 8px;
margin: 8px;
}
.passed {
border: 3px solid green;
}
.failed {
border: 3px solid red;
}
.passed-info {
color: green;
}
.failed-info {
color: red;
}
pre {
padding: 4px;
margin: 12px;
border: 1px solid rgb(128, 128, 128);
background-color: whitesmoke;
}
body.hide-passed .passed {
display: none;
}
</style>
</head>
<body>
<header>
<h1>📡 ssexi test suite</h1>
<div>
<div class="passed-info">Passed: <output></output></div>
<div class="failed-info">Failed: <output></output></div>
<a href="javascript:document.body.classList.toggle('hide-passed')">Toggle Passed</a><br/>
<a href="test.html">Run All</a>
</div>
</header>
<main>
<section id="headers">
<h2>Accept header</h2>
<div class="test">
<h3>ssexi adds Accept: text/html, text/event-stream by default</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#h1')
let seen = null
btn.addEventListener("fx:before", (e) => seen = e.detail.cfg.headers.Accept)
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(new Response("ok", {headers: {'Content-Type': 'text/html'}}))
})
btn.click()
await sleep(30)
assertEq(seen, "text/html, text/event-stream")
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#h1">go</button>
<div id="h1"></div>
</div>
<div class="test">
<h3>user-supplied Accept (set in fx:config) wins over the ssexi default</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#h2')
let seen = null
// a per-element fx:config listener fires in target phase, before ssexi's
// document-level listener runs in bubble phase
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.headers.Accept = "application/custom"
e.detail.cfg.fetch = () => Promise.resolve(new Response("ok", {headers: {'Content-Type': 'text/html'}}))
})
btn.addEventListener("fx:before", (e) => seen = e.detail.cfg.headers.Accept)
btn.click()
await sleep(30)
assertEq(seen, "application/custom")
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#h2">go</button>
<div id="h2"></div>
</div>
</section>
<section id="basic">
<h2>Basic swap behaviour</h2>
<div class="test">
<h3>innerHTML swap: last message wins</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t1');
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse("hello", "world"));
});
btn.click();
await sleep(60);
assertEq(target.innerHTML, "world");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t1">go</button>
<div id="t1"></div>
</div>
<div class="test">
<h3>beforeend swap: messages appended</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t2');
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse("<p>a</p>", "<p>b</p>"));
});
btn.click();
await sleep(60);
assertEq(target.innerHTML, "<p>a</p><p>b</p>");
})
</script>
<button fx-action="/test" fx-swap="beforeend" fx-target="#t2">go</button>
<div id="t2"></div>
</div>
<div class="test">
<h3>Non-SSE response falls through to normal fixi swap</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t11');
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(new Response("<b>normal</b>", {headers: {'Content-Type': 'text/html'}}));
});
btn.click();
await sleep(60);
assertEq(target.innerHTML, "<b>normal</b>");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t11">go</button>
<div id="t11"></div>
</div>
<div class="test">
<h3>Chunked delivery: all messages received</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t12');
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(chunkedSSEResponse("x", "y", "z"));
});
btn.click();
await sleep(80);
assertEq(target.innerHTML, "xyz");
})
</script>
<button fx-action="/test" fx-swap="beforeend" fx-target="#t12">go</button>
<div id="t12"></div>
</div>
</section>
<section id="parsing">
<h2>SSE message parsing</h2>
<div class="test">
<h3>Multiline data: lines joined by newline</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t9');
let raw = "data: line1\ndata: line2\n\n";
let encoder = new TextEncoder();
let stream = new ReadableStream({ start(c) { c.enqueue(encoder.encode(raw)); c.close() } });
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(new Response(stream, {headers: {'Content-Type': 'text/event-stream'}}));
});
btn.click();
await sleep(60);
assertEq(target.innerHTML, "line1\nline2");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t9">go</button>
<div id="t9"></div>
</div>
<div class="test">
<h3>Comments (`:` prefix lines) are ignored</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t10');
let raw = ": this is a comment\ndata: real\n\n";
let encoder = new TextEncoder();
let stream = new ReadableStream({ start(c) { c.enqueue(encoder.encode(raw)); c.close() } });
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(new Response(stream, {headers: {'Content-Type': 'text/event-stream'}}));
});
btn.click();
await sleep(60);
assertEq(target.innerHTML, "real");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t10">go</button>
<div id="t10"></div>
</div>
</section>
<section id="events">
<h2>Lifecycle events</h2>
<div class="test">
<h3>fx:sse:open fires on target</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t5');
let opened = false;
target.addEventListener("fx:sse:open", () => opened = true);
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse("hi"));
});
btn.click();
await sleep(60);
assertEq(opened, true);
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t5">go</button>
<div id="t5"></div>
</div>
<div class="test">
<h3>fx:sse:close fires on target</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t6');
let closed = false;
target.addEventListener("fx:sse:close", () => closed = true);
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse("bye"));
});
btn.click();
await sleep(60);
assertEq(closed, true);
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t6">go</button>
<div id="t6"></div>
</div>
<div class="test">
<h3>fx:sse:swapped fires after each swap with the new content visible</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t6b');
let observed = [];
target.addEventListener("fx:sse:swapped", () => observed.push(target.innerHTML));
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse("a", "b", "c"));
});
btn.click();
await sleep(60);
// each fx:sse:swapped event should already see the appended content
assertEq(observed.length, 3);
assertEq(observed[0], "a");
assertEq(observed[1], "ab");
assertEq(observed[2], "abc");
})
</script>
<button fx-action="/test" fx-swap="beforeend" fx-target="#t6b">go</button>
<div id="t6b"></div>
</div>
<div class="test">
<h3>Cancelling fx:sse:open stops the swap</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t7');
target.addEventListener("fx:sse:open", (e) => e.preventDefault());
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse("nope"));
});
btn.click();
await sleep(60);
assertEq(target.innerHTML, "");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t7">go</button>
<div id="t7"></div>
</div>
<div class="test">
<h3>Cancelling fx:sse:message stops subsequent messages</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t8');
let count = 0;
target.addEventListener("fx:sse:message", (e) => {
count++;
if (count >= 2) e.preventDefault();
});
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse("a", "b", "c"));
});
btn.click();
await sleep(60);
assertEq(target.innerHTML, "a");
})
</script>
<button fx-action="/test" fx-swap="beforeend" fx-target="#t8">go</button>
<div id="t8"></div>
</div>
</section>
<section id="named-events">
<h2>Named events</h2>
<div class="test">
<h3>Named event dispatches fx:sse:<name> and is not swapped</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t3');
let eventData = null;
target.addEventListener("fx:sse:status", (e) => { eventData = e.detail.message.data });
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse({event: "status", data: "ok"}));
});
btn.click();
await sleep(60);
assertEq(eventData, "ok");
assertEq(target.innerHTML, "");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t3">go</button>
<div id="t3"></div>
</div>
<div class="test">
<h3>Mixed named + unnamed: only unnamed swapped</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t4');
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse(
"<p>1</p>",
{event: "ping", data: "skip"},
"<p>2</p>"
));
});
btn.click();
await sleep(60);
assertEq(target.innerHTML, "<p>1</p><p>2</p>");
})
</script>
<button fx-action="/test" fx-swap="beforeend" fx-target="#t4">go</button>
<div id="t4"></div>
</div>
<div class="test">
<h3>Regular named events dispatch with full data</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t24');
let eventData = null;
target.addEventListener("fx:sse:notify", (e) => eventData = e.detail.message.data);
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse({event: "notify", data: "hello"}));
});
btn.click();
await sleep(60);
assertEq(eventData, "hello");
assertEq(target.innerHTML, "");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t24">go</button>
<div id="t24"></div>
</div>
</section>
<section id="state">
<h2>Message state tracking</h2>
<div class="test">
<h3>message.id passed to fx:sse:message event</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t14');
let lastId = null;
target.addEventListener("fx:sse:message", (e) => lastId = e.detail.message.id);
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse({data: "hi", id: "42"}));
});
btn.click();
await sleep(60);
assertEq(lastId, "42");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t14">go</button>
<div id="t14"></div>
</div>
<div class="test">
<h3>cfg.sse.lastEventId tracks last seen id</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t15');
let sseState = null;
target.addEventListener("fx:sse:close", (e) => sseState = e.detail.cfg.sse);
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse(
{data: "a", id: "1"},
{data: "b", id: "2"},
{data: "c", id: "3"}
));
});
btn.click();
await sleep(60);
assertEq(sseState?.lastEventId, "3");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t15">go</button>
<div id="t15"></div>
</div>
<div class="test">
<h3>cfg.sse.retry tracks server retry hint</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t16');
let sseState = null;
target.addEventListener("fx:sse:close", (e) => sseState = e.detail.cfg.sse);
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse({data: "hi", retry: 3000}));
});
btn.click();
await sleep(60);
assertEq(sseState?.retry, 3000);
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t16">go</button>
<div id="t16"></div>
</div>
<div class="test">
<h3>Standalone retry: tracked on cfg.sse, data still swapped</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t19');
let sseState = null;
target.addEventListener("fx:sse:close", (e) => sseState = e.detail.cfg.sse);
let raw = "retry: 5000\n\ndata: hello\n\n";
let encoder = new TextEncoder();
let stream = new ReadableStream({ start(c) { c.enqueue(encoder.encode(raw)); c.close() } });
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(new Response(stream, {headers: {'Content-Type': 'text/event-stream'}}));
});
btn.click();
await sleep(60);
assertEq(sseState?.retry, 5000);
assertEq(target.innerHTML, "hello");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t19">go</button>
<div id="t19"></div>
</div>
<div class="test">
<h3>Standalone id: tracked on cfg.sse, no spurious swap</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t20');
let sseState = null;
target.addEventListener("fx:sse:close", (e) => sseState = e.detail.cfg.sse);
let raw = "id: seed-99\n\ndata: content\n\n";
let encoder = new TextEncoder();
let stream = new ReadableStream({ start(c) { c.enqueue(encoder.encode(raw)); c.close() } });
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(new Response(stream, {headers: {'Content-Type': 'text/event-stream'}}));
});
btn.click();
await sleep(60);
assertEq(sseState?.lastEventId, "seed-99");
assertEq(target.innerHTML, "content");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t20">go</button>
<div id="t20"></div>
</div>
<div class="test">
<h3>cfg.sse.reader is exposed and supports cancellation</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t17');
let readerRef = null;
currentTest.testElt.addEventListener("fx:sse:open", (e) => {
readerRef = e.detail.cfg.sse.reader;
}, {once: true});
let encoder = new TextEncoder();
let i = 0;
let chunks = ["data: a\n\n", "data: b\n\n", "data: c\n\n"];
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => {
let stream = new ReadableStream({
async pull(controller) {
await new Promise(r => setTimeout(r, 20));
if (i < chunks.length) controller.enqueue(encoder.encode(chunks[i++]));
else controller.close();
}
});
return Promise.resolve(new Response(stream, {headers: {'Content-Type': 'text/event-stream'}}));
};
});
btn.click();
await sleep(30);
if (readerRef == null) throw "cfg.sse.reader was not exposed";
readerRef.cancel();
await sleep(120);
if (target.innerHTML.length >= 3) throw `expected partial content, got "${target.innerHTML}"`;
})
</script>
<button fx-action="/test" fx-swap="beforeend" fx-target="#t17">go</button>
<div id="t17"></div>
</div>
</section>
<section id="outer-html">
<h2>outerHTML streaming</h2>
<div class="test">
<h3>outerHTML: first message replaces, rest append after</h3>
<script>
test(async () => {
let btn = find('button');
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse("<b>first</b>", "<i>second</i>", "<u>third</u>"));
});
btn.click();
await sleep(60);
if (find('#t13')) throw "#t13 should have been replaced";
let html = currentTest.testElt.innerHTML;
if (!html.includes("<b>first</b><i>second</i><u>third</u>")) {
throw `expected replacement + appended content, got "${html}"`;
}
})
</script>
<button fx-action="/test" fx-swap="outerHTML" fx-target="#t13">go</button>
<div id="t13">original</div>
</div>
<div class="test">
<h3>outerHTML: single message just replaces</h3>
<script>
test(async () => {
let btn = find('button');
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse("<span>replaced</span>"));
});
btn.click();
await sleep(60);
if (find('#t13b')) throw "#t13b should have been replaced";
if (!currentTest.testElt.innerHTML.includes("<span>replaced</span>")) {
throw `expected replacement content, got "${currentTest.testElt.innerHTML}"`;
}
})
</script>
<button fx-action="/test" fx-swap="outerHTML" fx-target="#t13b">go</button>
<div id="t13b">original</div>
</div>
<div class="test">
<h3>outerHTML: message and close events bubble to ancestors</h3>
<script>
test(async () => {
let btn = find('button');
let msgCount = 0, closeFired = false;
currentTest.testElt.addEventListener("fx:sse:message", () => msgCount++);
currentTest.testElt.addEventListener("fx:sse:close", () => closeFired = true, {once: true});
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse("<b>a</b>", "<b>b</b>"));
});
btn.click();
await sleep(60);
if (msgCount < 2) throw `expected >=2 message events, got ${msgCount}`;
assertEq(closeFired, true);
})
</script>
<button fx-action="/test" fx-swap="outerHTML" fx-target="#t18">go</button>
<div id="t18">original</div>
</div>
</section>
<section id="json-events">
<h2>JSON-encoded event names</h2>
<div class="test">
<h3>JSON event with target: swaps into specified element</h3>
<script>
test(async () => {
let btn = find('button'), main = find('#t21'), other = find('#t21-other');
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse({event: '{"target":"#t21-other"}', data: "routed"}, "default"));
});
btn.click();
await sleep(60);
assertEq(other.innerHTML, "routed");
assertEq(main.innerHTML, "default");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t21">go</button>
<div id="t21"></div>
<div id="t21-other"></div>
</div>
<div class="test">
<h3>JSON event with target + swap: uses custom swap mode</h3>
<script>
test(async () => {
let btn = find('button'), main = find('#t22'), side = find('#t22-side');
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse({event: '{"target":"#t22-side","swap":"beforeend"}', data: "+more"}, "main"));
});
btn.click();
await sleep(60);
assertEq(side.innerHTML, "existing+more");
assertEq(main.innerHTML, "main");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t22">go</button>
<div id="t22"></div>
<div id="t22-side">existing</div>
</div>
<div class="test">
<h3>JSON event: does not dispatch a named fx:sse:<json> event</h3>
<script>
test(async () => {
let btn = find('button');
let namedFired = false;
currentTest.testElt.addEventListener("fx:sse:{", () => namedFired = true, {once: true});
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse({event: '{"target":"#t23-dest"}', data: "hi"}));
});
btn.click();
await sleep(60);
assertEq(find('#t23-dest').innerHTML, "hi");
assertEq(namedFired, false);
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t23">go</button>
<div id="t23"></div>
<div id="t23-dest"></div>
</div>
<div class="test">
<h3>JSON event: fx:sse:swapped fires on the routed target, not the original</h3>
<script>
test(async () => {
let btn = find('button'), main = find('#t24'), dest = find('#t24-dest');
let dispatchedOn = [];
main.addEventListener("fx:sse:swapped", (e) => dispatchedOn.push("main:" + e.target.id));
dest.addEventListener("fx:sse:swapped", (e) => dispatchedOn.push("dest:" + e.target.id));
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse({event: '{"target":"#t24-dest"}', data: "x"}));
});
btn.click();
await sleep(60);
// event must fire on #t24-dest (the routed target) so a listener attached
// there sees it directly. Bubbling through #t24 (the original cfg.target)
// would be wrong because they're not ancestors.
assertEq(dispatchedOn.length, 1);
assertEq(dispatchedOn[0], "dest:t24-dest");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t24">go</button>
<div id="t24"></div>
<div id="t24-dest"></div>
</div>
<div class="test">
<h3>JSON events fan one stream out to multiple targets with per-message swap modes</h3>
<script>
test(async () => {
let btn = find('button');
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse(
{event: '{"target":"#t25-clock"}', data: "12:00:00"},
{event: '{"target":"#t25-log","swap":"beforeend"}', data: "<i>a</i>"},
{event: '{"target":"#t25-clock"}', data: "12:00:01"},
{event: '{"target":"#t25-log","swap":"beforeend"}', data: "<i>b</i>"},
{event: '{"target":"#t25-log","swap":"beforeend"}', data: "<i>c</i>"},
));
});
btn.click();
await sleep(80);
// last clock value wins via innerHTML (the connection's default swap)
assertEq(find('#t25-clock').innerHTML, "12:00:01");
// log accumulates via per-message beforeend
assertEq(find('#t25-log').innerHTML, "<i>a</i><i>b</i><i>c</i>");
// the original cfg.target (#t25) was never written to
assertEq(find('#t25').innerHTML, "");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t25">go</button>
<div id="t25"></div>
<div id="t25-clock"></div>
<div id="t25-log"></div>
</div>
<div class="test">
<h3>JSON event with transition:true wraps the swap in cfg.transition()</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t26');
let txCalls = 0;
// use fx:before; fx:config has a global handler at the top of the file
// that resets cfg.transition to false, which would clobber our stub
btn.addEventListener("fx:before", (e) => {
e.detail.cfg.transition = (fn) => { txCalls++; fn(); return { finished: Promise.resolve() } };
});
// null out before fixi's outer doSwap wrap fires so we count only ssexi calls
btn.addEventListener("fx:after", (e) => e.detail.cfg.transition = null);
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse(
"no-tx",
{event: '{"transition":true}', data: "tx"},
));
});
btn.click();
await sleep(60);
// first frame: no transition wrapper. second frame: transition wrapper called exactly once.
assertEq(txCalls, 1);
assertEq(target.innerHTML, "tx");
})
</script>
<button fx-action="/test" fx-swap="innerHTML" fx-target="#t26">go</button>
<div id="t26"></div>
</div>
<div class="test">
<h3>JSON event with only transition:true preserves the default target and swap</h3>
<script>
test(async () => {
let btn = find('button'), main = find('#t27'), other = find('#t27-other');
btn.addEventListener("fx:before", (e) => {
e.detail.cfg.transition = (fn) => { fn(); return { finished: Promise.resolve() } };
});
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse(
{event: '{"transition":true}', data: "+wrapped"},
));
});
btn.click();
await sleep(60);
// no target in the JSON, so cfg.target (#t27) gets the swap with the default style (beforeend)
assertEq(main.innerHTML, "+wrapped");
assertEq(other.innerHTML, "");
})
</script>
<button fx-action="/test" fx-swap="beforeend" fx-target="#t27">go</button>
<div id="t27"></div>
<div id="t27-other"></div>
</div>
<div class="test">
<h3>JSON event without transition does NOT call cfg.transition()</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#t28');
let txCalls = 0;
btn.addEventListener("fx:before", (e) => {
e.detail.cfg.transition = (fn) => { txCalls++; fn(); return { finished: Promise.resolve() } };
});
btn.addEventListener("fx:after", (e) => e.detail.cfg.transition = null);
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => Promise.resolve(sseResponse(
{event: '{"swap":"innerHTML"}', data: "plain"},
));
});
btn.click();
await sleep(60);
assertEq(txCalls, 0);
assertEq(target.innerHTML, "plain");
})
</script>
<button fx-action="/test" fx-swap="beforeend" fx-target="#t28">go</button>
<div id="t28"></div>
</div>
</section>
<section id="reconnect">
<h2>Reconnect and pauseOnHidden</h2>
<div class="test">
<h3>no reconnect by default: fetch called once when stream closes</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#rc1');
let calls = 0;
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.fetch = () => { calls++; return Promise.resolve(sseResponse("hi")) };
});
btn.click();
await sleep(120);
assertEq(calls, 1);
assertEq(target.innerHTML, "hi");
})
</script>
<button fx-action="/stream" fx-swap="innerHTML" fx-target="#rc1">go</button>
<div id="rc1"></div>
</div>
<div class="test">
<h3>sseReconnect reconnects with Last-Event-ID after close</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#rc2');
let calls = 0, lastHeader = null;
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.sseReconnect = true;
e.detail.cfg.fetch = (url, opts) => {
calls++;
lastHeader = new Headers(opts.headers).get('Last-Event-ID');
if (calls === 1) return Promise.resolve(sseResponse({data: "a", id: "7", retry: 10}));
e.detail.cfg.sse.close();
return Promise.resolve(sseResponse("b"));
};
});
btn.click();
await sleep(200);
assertEq(calls, 2);
assertEq(lastHeader, "7");
})
</script>
<button fx-action="/stream" fx-swap="innerHTML" fx-target="#rc2">go</button>
<div id="rc2"></div>
</div>
<div class="test">
<h3>sse.close() stops reconnect loop</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#rc3');
let calls = 0;
target.addEventListener("fx:sse:message", (e) => e.detail.cfg.sse.close(), {once: true});
btn.addEventListener("fx:config", (e) => {
e.detail.cfg.sseReconnect = true;
e.detail.cfg.fetch = () => {
calls++;
return Promise.resolve(sseResponse({data: "x", retry: 10}));
};
});
btn.click();
await sleep(150);
assertEq(calls, 1);
})
</script>
<button fx-action="/stream" fx-swap="innerHTML" fx-target="#rc3">go</button>
<div id="rc3"></div>
</div>
<div class="test">
<h3>sseDisconnectOnHidden closes stream on visibilitychange</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#rc4');
let cfgRef;
btn.addEventListener("fx:config", (e) => {
cfgRef = e.detail.cfg;
e.detail.cfg.sseDisconnectOnHidden = true;
e.detail.cfg.sseReconnect = true;
e.detail.cfg.fetch = () => Promise.resolve(chunkedSSEResponse({data: "keep", retry: 10}));
});
btn.click();
await sleep(50);
let origHidden = Object.getOwnPropertyDescriptor(Document.prototype, 'hidden');
Object.defineProperty(document, 'hidden', {value: true, configurable: true});
document.dispatchEvent(new Event('visibilitychange'));
await sleep(50);
let closed = cfgRef.sse?.closed;
if (origHidden) Object.defineProperty(document, 'hidden', origHidden);
else delete document.hidden;
document.dispatchEvent(new Event('visibilitychange'));
assertEq(closed, true);
})
</script>
<button fx-action="/stream" fx-swap="beforeend" fx-target="#rc4">go</button>
<div id="rc4"></div>
</div>
<div class="test">
<h3>ssePauseOnHidden does NOT close the stream on hidden (just pauses)</h3>
<script>
test(async () => {
let btn = find('button'), target = find('#rc5');