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test(net): improve test coverage (#4709)

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Co-authored-by: Asher Gomez <ashersaupingomez@gmail.com>
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Michael Herzner 2024-05-13 00:17:22 +02:00 committed by GitHub
parent ea70808fee
commit 1cd35a6746
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1 changed files with 27 additions and 2 deletions
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29
net/get_available_port_test.ts
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@ -1,7 +1,8 @@
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license. // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { getAvailablePort } from "./get_available_port.ts"; import { getAvailablePort } from "./get_available_port.ts";
import { assertEquals } from "@std/assert"; import { assertEquals, assertNotEquals, assertThrows } from "@std/assert";
import { stub } from "@std/testing/mock";
/** Helper function to see if a port is indeed available for listening (race-y) */ /** Helper function to see if a port is indeed available for listening (race-y) */
async function testWithPort(port: number) { async function testWithPort(port: number) {
@ -20,10 +21,34 @@ async function testWithPort(port: number) {
Deno.test("getAvailablePort() gets an available port", async () => { Deno.test("getAvailablePort() gets an available port", async () => {
const port = getAvailablePort(); const port = getAvailablePort();
assertEquals(typeof port, "number");
await testWithPort(port); await testWithPort(port);
}); });
Deno.test("getAvailablePort() gets an available port with a preferred port", async () => { Deno.test("getAvailablePort() gets an available port with a preferred port", async () => {
const port = getAvailablePort({ preferredPort: 9563 }); const preferredPort = 9563;
const port = getAvailablePort({ preferredPort });
assertEquals(port, preferredPort);
await testWithPort(port); await testWithPort(port);
}); });
Deno.test("getAvailablePort() falls back to another port if preferred port is in use", async () => {
const preferredPort = 9563;
const server = Deno.serve(
{ port: preferredPort, onListen: () => {} },
() => new Response("hello"),
);
const port = getAvailablePort({ preferredPort });
assertEquals(typeof port, "number");
assertNotEquals(port, preferredPort);
server.shutdown();
await server.finished;
});
Deno.test("getAvailablePort() throws if error is not AddrInUse", () => {
using _ = stub(Deno, "listen", () => {
throw new Error();
});
const preferredPort = 9563;
assertThrows(() => getAvailablePort({ preferredPort }), Error);
});