From 0b3be27b9a6d9c770eda768c845d5466230ad80c Mon Sep 17 00:00:00 2001
From: Kat <00-kat@proton.me>
Date: Sat, 14 Mar 2026 09:55:21 +1100
Subject: [PATCH] cmd/pkgserver: add DOM reporter for JS tests

---
 cmd/pkgserver/ui.go               |  8 ++++++
 cmd/pkgserver/ui/static/test.scss | 24 ++++++++++++++++
 cmd/pkgserver/ui/static/test.ts   | 48 +++++++++++++++++++++++++++++--
 cmd/pkgserver/ui/test.html        | 24 ++++++++++++++++
 cmd/pkgserver/ui_full.go          |  2 +-
 5 files changed, 103 insertions(+), 3 deletions(-)
 create mode 100644 cmd/pkgserver/ui/static/test.scss
 create mode 100644 cmd/pkgserver/ui/test.html

diff --git a/cmd/pkgserver/ui.go b/cmd/pkgserver/ui.go
index e4c4283..5b1c510 100644
--- a/cmd/pkgserver/ui.go
+++ b/cmd/pkgserver/ui.go
@@ -25,14 +25,22 @@ func serveStaticContent(w http.ResponseWriter, r *http.Request) {
 		http.ServeFileFS(w, r, content, "ui/static/favicon.ico")
 	case "/static/index.js":
 		http.ServeFileFS(w, r, content, "ui/static/index.js")
+	case "/static/test.js":
+		http.ServeFileFS(w, r, content, "ui/static/test.js")
+	case "/static/test.css":
+		http.ServeFileFS(w, r, content, "ui/static/test.css")
 	default:
 		http.NotFound(w, r)
 
 	}
 }
+func serveTester(w http.ResponseWriter, r *http.Request) {
+	http.ServeFileFS(w, r, content, "ui/test.html")
+}
 
 func uiRoutes(mux *http.ServeMux) {
 	mux.HandleFunc("GET /{$}", serveWebUI)
 	mux.HandleFunc("GET /favicon.ico", serveStaticContent)
 	mux.HandleFunc("GET /static/", serveStaticContent)
+	mux.HandleFunc("GET /test.html", serveTester)
 }
diff --git a/cmd/pkgserver/ui/static/test.scss b/cmd/pkgserver/ui/static/test.scss
new file mode 100644
index 0000000..28d7044
--- /dev/null
+++ b/cmd/pkgserver/ui/static/test.scss
@@ -0,0 +1,24 @@
+.root {
+    margin: 1rem 0;
+}
+
+details.test-node {
+    margin-left: 1rem;
+    padding: 0.2rem 0.5rem;
+    border-left: 2px dashed black;
+    > summary {
+        cursor: pointer;
+    }
+    &.failure > summary::marker {
+        color: red;
+    }
+}
+
+p.test-desc {
+    margin: 0 0 0 1rem;
+    padding: 2px 0;
+}
+
+.italic {
+    font-style: italic;
+}
diff --git a/cmd/pkgserver/ui/static/test.ts b/cmd/pkgserver/ui/static/test.ts
index f9ee099..7c22096 100644
--- a/cmd/pkgserver/ui/static/test.ts
+++ b/cmd/pkgserver/ui/static/test.ts
@@ -75,7 +75,51 @@ export class StreamReporter implements Reporter {
     }
 }
 
-const r = new StreamReporter({ writeln: console.log }, true);
+export class DOMReporter implements Reporter {
+    update(path: string[], result: TestResult) {
+        if (path.length === 0) throw new RangeError("path is empty");
+        const counter = document.getElementById(result.success ? "successes" : "failures");
+        counter.innerText = (Number(counter.innerText) + 1).toString();
+        let parent = document.getElementById("root");
+        for (const node of path) {
+            let child = null;
+            outer: for (const d of parent.children) {
+                for (const s of d.children) {
+                    if (!(s instanceof HTMLElement)) continue;
+                    if (s.tagName !== "SUMMARY" || s.innerText !== node) continue;
+                    child = d;
+                    break outer;
+                }
+            }
+            if (child === null) {
+                child = document.createElement("details");
+                child.className = "test-node";
+                const summary = document.createElement("summary");
+                summary.appendChild(document.createTextNode(node));
+                child.appendChild(summary);
+                parent.appendChild(child);
+            }
+            if (!result.success) {
+                child.open = true;
+                child.classList.add("failure");
+            }
+            parent = child;
+        }
+        const p = document.createElement("p");
+        p.classList.add("test-desc");
+        if (result.output) {
+            const code = document.createElement("code");
+            code.appendChild(document.createTextNode(result.output));
+            p.appendChild(code);
+        } else {
+            p.classList.add("italic");
+            p.appendChild(document.createTextNode("No output."));
+        }
+        parent.appendChild(p);
+    }
+}
+
+let r = typeof document !== "undefined" ? new DOMReporter() : new StreamReporter({ writeln: console.log });
 r.update(["alien", "can walk"], { success: false, output: "assertion failed" });
 r.update(["alien", "can speak"], { success: false, output: "Uncaught ReferenceError: larynx is not defined" });
 r.update(["alien", "sleep"], { success: true, output: "" });
@@ -83,4 +127,4 @@ r.update(["Tetromino", "generate", "tessellates"], { success: false, output: "as
 r.update(["Tetromino", "solve", "works"], { success: true, output: "" });
 r.update(["discombobulate"], { success: false, output: "hippopotamonstrosesquippedaliophobia" });
 r.update(["recombobulate"], { success: true, output: "" });
-r.display();
+if (r instanceof StreamReporter) r.display();
diff --git a/cmd/pkgserver/ui/test.html b/cmd/pkgserver/ui/test.html
new file mode 100644
index 0000000..79d2153
--- /dev/null
+++ b/cmd/pkgserver/ui/test.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <link rel="stylesheet" href="static/style.css">
+    <link rel="stylesheet" href="static/test.css">
+    <title>PkgServer Tests</title>
+</head>
+<body>
+<h1>PkgServer Tests</h1>
+
+<main>
+<div id="counters">
+    <span id="successes">0</span> succeeded, <span id="failures">0</span> failed.
+</div>
+
+<div id="root">
+</div>
+
+<script type="module" src="./static/test.js"></script>
+</main>
+</body>
+</html>
diff --git a/cmd/pkgserver/ui_full.go b/cmd/pkgserver/ui_full.go
index f9ca881..837d64d 100644
--- a/cmd/pkgserver/ui_full.go
+++ b/cmd/pkgserver/ui_full.go
@@ -4,6 +4,6 @@ package main
 
 import "embed"
 
-//go:generate sh -c "sass ui/static/dark.scss ui/static/dark.css && sass ui/static/light.scss ui/static/light.css && tsc -p ui/static"
+//go:generate sh -c "sass ui/static/dark.scss ui/static/dark.css && sass ui/static/light.scss ui/static/light.css && sass ui/static/test.scss ui/static/test.css && tsc -p ui/static"
 //go:embed ui/*
 var content embed.FS