fix(TypedMessenger): Make sure TypedMessenger still works in minified…

… builds (#933)

.eslintignore

@@ -10,3 +10,4 @@ deno_dir
 studio/src/styles/projectSelectorStyles.js
 studio/src/styles/studioStyles.js
 studio/src/styles/shadowStyles.js
+test/minified/out

.eslintrc.cjs

@@ -189,7 +189,7 @@ module.exports = {
 		"no-useless-constructor": "error",
 		"no-useless-rename": "error",
 		"no-var": "error",
-		"object-shorthand": "error",
+		"object-shorthand": ["error", "always", {avoidQuotes: true}],
 		"prefer-arrow-callback": "error",
 		"prefer-const": ["error", {destructuring: "all"}],
 		"prefer-numeric-literals": "error",

.github/workflows/ci.yml

@@ -95,6 +95,31 @@ jobs:
           flags: unittests
           token: ${{ secrets.CODECOV_TOKEN }}
 
+  minified-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup repo
+        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+
+      - name: Cache
+        uses: actions/cache@9b0c1fce7a93df8e3bb8926b0d6e9d89e92f20a7
+        with:
+          path: |
+            deno_dir
+            .denoTypes
+            npm_packages
+            studio/deps
+          key: ci-${{ github.run_id }}_${{ github.run_attempt }}
+          restore-keys: ci-
+
+      - name: Setup Deno
+        uses: denoland/setup-deno@041b854f97b325bd60e53e9dc2de9cb9f9ac0cba
+        with:
+          deno-version: ${{ env.DENO_VERSION }}
+
+      - name: Run minified tests
+        run: deno task test test/minified
+
   e2e-tests:
     runs-on: ubuntu-latest
     steps:

.gitignore

@@ -6,3 +6,4 @@ npm_packages
 deno.lock
 npmPackage
 jsrPackage
+test/minified/out/

jsconfig.json

@@ -27,7 +27,8 @@
 		"test/**/*.ts",
 	],
 	"exclude": [
-		"test/e2e/studio/projects/"
+		"test/e2e/studio/projects/",
+		"test/minified/out"
 	],
 	"files": [
 		"src/mod.js",

scripts/shared/rollupTerserPlugin.js

@@ -0,0 +1,25 @@
+import { minify } from "terser";
+
+const nameCache = {};
+
+/**
+ * A rollup plugin for minifying builds.
+ * @param {import("terser").MinifyOptions} minifyOptions
+ * @returns {import("rollup").Plugin}
+ */
+export function rollupTerserPlugin(minifyOptions = {}) {
+	return {
+		name: "terser",
+		async renderChunk(code, chunk, outputOptions) {
+			const output = await minify(code, {
+				...minifyOptions,
+				nameCache,
+			});
+			if (!output.code) return null;
+			return {
+				code: output.code,
+				map: output.map,
+			};
+		},
+	};
+}

scripts/test.js

@@ -1,9 +1,13 @@
 #!/usr/bin/env -S deno run --unstable --no-check --allow-run --allow-read --allow-write --allow-env --allow-net
 
-import { join, resolve } from "std/path/mod.ts";
+import * as path from "std/path/mod.ts";
+import * as fs from "std/fs/mod.ts";
 import { setCwd } from "chdir-anywhere";
 import { dev } from "./dev.js";
 import { parseArgs } from "../test/shared/testArgs.js";
+import { buildEngine } from "./buildEngine.js";
+import { rollup } from "rollup";
+import { rollupTerserPlugin } from "./shared/rollupTerserPlugin.js";
 
 setCwd();
 Deno.chdir("..");
@@ -35,6 +39,7 @@ if (Deno.args.length > 0 && !Deno.args[0].startsWith("-")) {
 }
 
 const needsUnitTests = !filteredTests || filteredTests.startsWith("test/unit");
+const needsMinifiedTests = !filteredTests || filteredTests.startsWith("test/minified");
 const needsE2eTests = !filteredTests || filteredTests.startsWith("test/e2e");
 
 await dev({
@@ -60,7 +65,7 @@ if (needsUnitTests) {
 		await removeMaybeDirectory(DENO_COVERAGE_DIR);
 		await removeMaybeDirectory(FAKE_IMPORTS_COVERAGE_DIR);
 		denoTestArgs.push(`--coverage=${DENO_COVERAGE_DIR}`);
-		const coverageMapPath = join(Deno.cwd(), FAKE_IMPORTS_COVERAGE_DIR);
+		const coverageMapPath = path.join(Deno.cwd(), FAKE_IMPORTS_COVERAGE_DIR);
 		applicationCmdArgs.add(`--fi-coverage-map=${coverageMapPath}`);
 	}
 	denoTestArgs.push(filteredTests || "test/unit/");
@@ -69,6 +74,122 @@ if (needsUnitTests) {
 	testCommands.push(cmd);
 }
 
+// Minified tests
+if (needsMinifiedTests) {
+	const testMinifiedDir = path.resolve("test/minified");
+	const testsDir = path.resolve(testMinifiedDir, "tests");
+	const outDir = path.resolve(testMinifiedDir, "out");
+	const engineDir = path.resolve(outDir, "engine");
+	const testOutDir = path.resolve(outDir, "tests");
+	const minifiedRendaPath = path.resolve(testMinifiedDir, "shared/minifiedRenda.js");
+	const unminifiedRendaPath = path.resolve(testMinifiedDir, "shared/unminifiedRenda.js");
+
+	const noBuildFlag = Deno.args.includes("--no-build");
+
+	const denoTestArgs = [Deno.execPath(), "test", "--no-check", "--allow-env", "--allow-read", "--allow-net", "--parallel"];
+
+	if (noBuildFlag) {
+		denoTestArgs.push(filteredTests || "test/minified/tests/");
+	} else {
+		denoTestArgs.push("test/minified/out/tests/");
+
+		try {
+			await Deno.remove(outDir, { recursive: true });
+		} catch (e) {
+			if (e instanceof Deno.errors.NotFound) {
+				// Already removed
+			} else {
+				throw e;
+			}
+		}
+
+		await buildEngine(engineDir);
+
+		/**
+		 * @returns {import("rollup").Plugin}
+		 */
+		function rollupRedirectBuildPlugin() {
+			return {
+				name: "redirectBuild",
+				async resolveId(id, importer) {
+					if (importer) {
+						const dirname = path.dirname(importer);
+						const resolved = path.resolve(dirname, id);
+						if (resolved == minifiedRendaPath) {
+							return path.resolve(engineDir, "renda.js");
+						} else if (resolved == unminifiedRendaPath) {
+							// We want to allow tests to export from both the built and non-built library.
+							// This allows us to simulate situations such as minified client code that wants to
+							// communicate with non-minified server code.
+							// By marking ./src/unminifiedRenda.js as external, we make sure that the build of our tests
+							// keep referencing this file directly, as opposed to including its contents in the bundle.
+							// But we do have to rewrite the imported path, since bundled tests will live at another location.
+							const newResolved = path.relative(testOutDir, unminifiedRendaPath);
+							return {
+								id: newResolved,
+								external: true,
+							};
+						}
+					}
+					// Treat std as external
+					if (id.startsWith("std/")) {
+						return false;
+					}
+					return null;
+				},
+			};
+		}
+
+		const testFiles = [];
+		for await (const entry of fs.walk(testsDir)) {
+			if (entry.name.endsWith(".test.js")) {
+				const relative = path.relative(testsDir, entry.path);
+				if (relative.startsWith("out/")) continue;
+				testFiles.push(entry.path);
+			}
+		}
+		const bundle = await rollup({
+			input: testFiles,
+			plugins: [rollupRedirectBuildPlugin()],
+			onwarn: (message) => {
+				if (message.code == "CIRCULAR_DEPENDENCY") return;
+				console.error(message.message);
+			},
+		});
+		const debug = Deno.args.includes("--debug") || Deno.args.includes("-d") || inspect;
+		await bundle.write({
+			dir: testOutDir,
+			plugins: [
+				rollupTerserPlugin({
+					/* eslint-disable camelcase */
+					module: true,
+					keep_classnames: debug,
+					keep_fnames: debug,
+					compress: {
+						drop_debugger: false,
+					},
+					sourceMap: debug,
+					mangle: {
+						module: true,
+						properties: {
+							debug,
+							keep_quoted: "strict",
+							reserved: ["Deno", "test", "fn"],
+						},
+					},
+					output: {
+						beautify: debug,
+					},
+					/* eslint-enable camelcase */
+				}),
+			],
+		});
+	}
+
+	if (inspect) denoTestArgs.push("--inspect-brk");
+	testCommands.push(denoTestArgs);
+}
+
 // E2e tests
 if (needsE2eTests) {
 	const cmd = [Deno.execPath(), "run", "--allow-env", "--allow-read", "--allow-write", "--allow-run", "--allow-net"];
@@ -144,5 +265,5 @@ if (needsCoverage) {
 			throw e;
 		}
 	}
-	await Deno.rename(resolve(DENO_COVERAGE_DIR, "html"), DENO_HTML_COVERAGE_DIR);
+	await Deno.rename(path.resolve(DENO_COVERAGE_DIR, "html"), DENO_HTML_COVERAGE_DIR);
 }

src/util/TypedMessenger/TypedMessenger.js

@@ -406,10 +406,9 @@ export class TypedMessenger {
 		 * ## Example
 		 *
 		 * ```js
-		 * const result = await messenger.proxy.myFunction(1, 2, 3);
+		 * const result = await messenger.send.myFunction(1, 2, 3);
 		 * ```
-		 * where `myFunction` is the name of one of the functions provided in {@linkcode initialize} or {@linkcode setResponseHandlers}.
-		 *
+		 * where `myFunction` is the name of one of the functions provided in {@linkcode setResponseHandlers} or one of the `initialize` methods.
 		 */
 		this.send = /** @type {TypedMessengerProxy<TReq>} */ (proxy);
 
@@ -453,7 +452,7 @@ export class TypedMessenger {
 	 */
 	initializeWorker(worker, responseHandlers) {
 		this.setSendHandler((data) => {
-			worker.postMessage(data.sendData, data.transfer);
+			worker.postMessage(data["sendData"], data["transfer"]);
 		});
 		worker.addEventListener("message", (event) => {
 			this.handleReceivedMessage(event.data);
@@ -480,8 +479,8 @@ export class TypedMessenger {
 	 */
 	initializeWorkerContext(responseHandlers) {
 		this.setSendHandler((data) => {
-			globalThis.postMessage(data.sendData, {
-				transfer: data.transfer,
+			globalThis.postMessage(data["sendData"], {
+				transfer: data["transfer"],
 			});
 		});
 		globalThis.addEventListener("message", (event) => {
@@ -528,7 +527,7 @@ export class TypedMessenger {
 				});
 				await promise;
 			}
-			webSocket.send(JSON.stringify(data.sendData));
+			webSocket.send(JSON.stringify(data["sendData"]));
 		});
 		webSocket.addEventListener("message", async (message) => {
 			try {
@@ -580,21 +579,21 @@ export class TypedMessenger {
 	 * @param {TypedMessengerMessageSendData<TRes, TReq>} data
 	 */
 	async handleReceivedMessage(data) {
-		if (data.direction == "request") {
+		if (data["direction"] == "request") {
 			if (!this.responseHandlers) {
 				throw new Error("Failed to handle message, no request handlers set. Make sure to call `setResponseHandlers` before handling messages.");
 			}
 			if (!this.sendHandler) {
 				throw new Error("Failed to handle message, no send handler set. Make sure to call `setSendHandler` before handling messages.");
 			}
-			const handler = this.responseHandlers[data.type];
+			const handler = this.responseHandlers[data["type"]];
 			let returnValue;
 			/** @type {Transferable[]} */
 			let transfer = [];
 			let didThrow = false;
 			if (handler) {
 				try {
-					returnValue = await handler(...data.args);
+					returnValue = await handler(...data["args"]);
 				} catch (e) {
 					returnValue = e;
 					if (this.serializeErrorHook) {
@@ -618,27 +617,27 @@ export class TypedMessenger {
 			}
 
 			await this.sendHandler(/** @type {TypedMessengerResponseMessageHelper<TRes, typeof data.type>} */ ({
-				sendData: {
-					direction: "response",
-					id: data.id,
-					didThrow,
-					type: data.type,
-					returnValue,
+				"sendData": {
+					"direction": "response",
+					"id": data["id"],
+					"didThrow": didThrow,
+					"type": data["type"],
+					"returnValue": returnValue,
 				},
 				transfer,
 			}));
 
 			if (respondOptions && respondOptions.afterSendHook) {
 				respondOptions.afterSendHook();
 			}
-		} else if (data.direction == "response") {
-			const cbs = this.onRequestIdMessageCbs.get(data.id);
+		} else if (data["direction"] == "response") {
+			const cbs = this.onRequestIdMessageCbs.get(data["id"]);
 			if (cbs) {
 				for (const cb of cbs) {
 					cb(data);
 				}
 			}
-			this.onRequestIdMessageCbs.delete(data.id);
+			this.onRequestIdMessageCbs.delete(data["id"]);
 		}
 	}
 
@@ -726,9 +725,9 @@ export class TypedMessenger {
 			} else {
 				promise = new Promise((resolve, reject) => {
 					this.onResponseMessage(requestId, (message) => {
-						if (message.didThrow) {
+						if (message["didThrow"]) {
 							/** @type {unknown} */
-							let rejectValue = message.returnValue;
+							let rejectValue = message["returnValue"];
 							if (this.deserializeErrorHook) {
 								rejectValue = this.deserializeErrorHook(rejectValue);
 							}
@@ -737,18 +736,18 @@ export class TypedMessenger {
 							}
 							reject(rejectValue);
 						} else {
-							resolve(message.returnValue);
+							resolve(message["returnValue"]);
 						}
 					});
 				});
 			}
 
 			await this.sendHandler(/** @type {TypedMessengerRequestMessageHelper<TReq, T>} */ ({
-				sendData: {
-					direction: "request",
-					id: requestId,
-					type,
-					args,
+				"sendData": {
+					"direction": "request",
+					"id": requestId,
+					"type": type,
+					"args": args,
 				},
 				transfer: sendOptions.transfer || [],
 			}));

test/minified/shared/minifiedRenda.js

@@ -0,0 +1,6 @@
+// This re-exports all engine files.
+// When building the tests, this file will export from 'dist/renda.min.js' instead.
+// This allows us to run the tests without building as well, and makes it easer
+// to check types when the tests haven't been built yet.
+
+export * from "../../../src/mod.js";