fix(cli/js/process): Strengthen socket types based on pipes (#4836)

3 files changed, 16 insertions, 12 deletions

diff --git a/std/examples/chat/server_test.ts b/std/examples/chat/server_test.ts
index 7375de47a..8e04b71d8 100644
--- a/std/examples/chat/server_test.ts
+++ b/std/examples/chat/server_test.ts
@@ -7,7 +7,9 @@ import { delay } from "../../async/delay.ts";
 
 const { test } = Deno;
 
-async function startServer(): Promise<Deno.Process> {
+async function startServer(): Promise<
+  Deno.Process<Deno.RunOptions & { stdout: "piped" }>
+> {
   const server = Deno.run({
     // TODO(lucacasonato): remove unstable once possible
     cmd: [
@@ -27,7 +29,7 @@ async function startServer(): Promise<Deno.Process> {
     const s = await r.readLine();
     assert(s !== null && s.includes("chat server starting"));
   } catch (err) {
-    server.stdout!.close();
+    server.stdout.close();
     server.close();
   }
 
@@ -46,7 +48,7 @@ test({
       assert(html.includes("ws chat example"), "body is ok");
     } finally {
       server.close();
-      server.stdout!.close();
+      server.stdout.close();
     }
     await delay(10);
   },
@@ -66,7 +68,7 @@ test({
       assertEquals((await it.next()).value, "[1]: Hello");
     } finally {
       server.close();
-      server.stdout!.close();
+      server.stdout.close();
       ws!.conn.close();
     }
   },
diff --git a/std/examples/tests/catj_test.ts b/std/examples/tests/catj_test.ts
index a859db0c1..58533ab60 100644
--- a/std/examples/tests/catj_test.ts
+++ b/std/examples/tests/catj_test.ts
@@ -17,7 +17,7 @@ Deno.test("[examples/catj] print an array", async () => {
 
     assertStrictEquals(actual, expected);
   } finally {
-    process.stdin!.close();
+    process.stdin.close();
     process.close();
   }
 });
@@ -36,7 +36,7 @@ Deno.test("[examples/catj] print an object", async () => {
 
     assertStrictEquals(actual, expected);
   } finally {
-    process.stdin!.close();
+    process.stdin.close();
     process.close();
   }
 });
@@ -54,7 +54,7 @@ Deno.test("[examples/catj] print multiple files", async () => {
 
     assertStrictEquals(actual, expected);
   } finally {
-    process.stdin!.close();
+    process.stdin.close();
     process.close();
   }
 });
@@ -64,8 +64,8 @@ Deno.test("[examples/catj] read from stdin", async () => {
   const process = catj("-");
   const input = `{ "foo": "bar" }`;
   try {
-    await process.stdin!.write(new TextEncoder().encode(input));
-    process.stdin!.close();
+    await process.stdin.write(new TextEncoder().encode(input));
+    process.stdin.close();
     const output = await process.output();
     const actual = decoder.decode(output).trim();
 
@@ -75,7 +75,9 @@ Deno.test("[examples/catj] read from stdin", async () => {
   }
 });
 
-function catj(...files: string[]): Deno.Process {
+function catj(
+  ...files: string[]
+): Deno.Process<Deno.RunOptions & { stdin: "piped"; stdout: "piped" }> {
   return Deno.run({
     cmd: [Deno.execPath(), "run", "--allow-read", "catj.ts", ...files],
     cwd: "examples",
diff --git a/std/examples/tests/echo_server_test.ts b/std/examples/tests/echo_server_test.ts
index 475b0f73f..2cf52e466 100644
--- a/std/examples/tests/echo_server_test.ts
+++ b/std/examples/tests/echo_server_test.ts
@@ -13,7 +13,7 @@ Deno.test("[examples/echo_server]", async () => {
 
   let conn: Deno.Conn | undefined;
   try {
-    const processReader = new BufReader(process.stdout!);
+    const processReader = new BufReader(process.stdout);
     const message = await processReader.readLine();
 
     assertNotEquals(message, null);
@@ -38,7 +38,7 @@ Deno.test("[examples/echo_server]", async () => {
     assertStrictEquals(actualResponse, expectedResponse);
   } finally {
     conn?.close();
-    process.stdout!.close();
+    process.stdout.close();
     process.close();
   }
 });