Add evaluate

packages/server/test/evaluate.test.ts

@@ -0,0 +1,39 @@
+import { createClient } from "./helpers";
+
+describe("Evaluate", () => {
+	const client = createClient();
+
+	it("should transfer string", async () => {
+		const value = await client.evaluate(function () {
+			return "hi";
+		});
+		
+		expect(value).toEqual("hi");
+	}, 100);
+
+	it("should compute from object", async () => {
+		const value = await client.evaluate((arg) => {
+			return arg.bananas * 2;
+		}, { bananas: 1 });
+		
+		expect(value).toEqual(2);
+	}, 100);
+
+	it("should transfer object", async () => {
+		const value = await client.evaluate(() => {
+			return { alpha: "beta" };
+		});
+		
+		expect(value.alpha).toEqual("beta");
+	}, 100);
+
+	it("should require", async () => {
+		const value = await client.evaluate(() => {
+			const fs = require("fs") as typeof import("fs");
+		
+			return Object.keys(fs).filter((f) => f === "readFileSync");
+		});
+
+		expect(value[0]).toEqual("readFileSync");
+	}, 100);
+});

packages/server/test/helpers.ts

@@ -0,0 +1,28 @@
+import { Emitter } from "@coder/events";
+import { Client } from "../src/browser/client";
+import { Server } from "../src/node/server";
+
+export const createClient = (): Client => {
+    const s2c = new Emitter<Uint8Array | Buffer>();
+    const c2s = new Emitter<Uint8Array | Buffer>();
+
+    new Server({
+        close: () => undefined,
+        onClose: () => undefined,
+        onMessage: (cb) => {
+            c2s.event((d) => cb(d));
+        },
+        send: (data) => setTimeout(() => s2c.emit(data), 0),
+    });
+
+    const client = new Client({
+        close: () => undefined,
+        onClose: () => undefined,
+        onMessage: (cb) => {
+            s2c.event((d) => cb(d));
+        },
+        send: (data) => setTimeout(() => c2s.emit(data), 0),
+    });
+
+    return client;
+};