Deno desktop stuff

tests/server_address_test.ts

@@ -0,0 +1,25 @@
+import { assertEquals, assertThrows } from "@std/assert";
+import { server_address } from "$/client/handshake.ts";
+
+const DESKTOP_PAGE = new URL("http://127.0.0.1:33549/client/");
+const HTTPS_PAGE = new URL("https://bworld.moder.fans/client/");
+
+Deno.test("servers on this machine use ws, everything else wss, whatever the page was served over", () => {
+	for (const host of ["localhost:8000", "127.0.0.1:8000", "0.0.0.0:8000", "[::1]:8000", "localhost"]) {
+		assertEquals(server_address(host, DESKTOP_PAGE).ws_url, `ws://${host}/ws`, host);
+		assertEquals(server_address(host, HTTPS_PAGE).ws_url, `ws://${host}/ws`, host);
+	}
+	for (const host of ["bworld.moder.fans", "example.com:8000", "192.168.1.5:8000", "localhost.example.com"]) {
+		assertEquals(server_address(host, DESKTOP_PAGE).ws_url, `wss://${host}/ws`, host);
+		assertEquals(server_address(host, DESKTOP_PAGE).base.protocol, "https:", host);
+	}
+});
+
+Deno.test("a scheme picks ws or wss itself", () => {
+	assertEquals(server_address("ws://192.168.1.5:8000", DESKTOP_PAGE).ws_url, "ws://192.168.1.5:8000/ws");
+	assertEquals(server_address("http://example.com", DESKTOP_PAGE).base.href, "http://example.com/");
+	assertEquals(server_address("wss://localhost:8000", DESKTOP_PAGE).ws_url, "wss://localhost:8000/ws");
+	assertEquals(server_address("https://bworld.moder.fans/", HTTPS_PAGE).cross_origin, false);
+	assertThrows(() => server_address("", DESKTOP_PAGE));
+	assertThrows(() => server_address("not a host", DESKTOP_PAGE));
+});