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response_test.ts
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response_test.ts
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// Copyright 2018-2021 the oak authors. All rights reserved. MIT license.
import { readAll, Status } from "./deps.ts";
import { assert, assertEquals, assertThrows, Buffer } from "./test_deps.ts";
import type { Request } from "./request.ts";
import { REDIRECT_BACK, Response } from "./response.ts";
const { test } = Deno;
const decoder = new TextDecoder();
function decodeBody(body: Uint8Array | Deno.Reader | undefined): string {
return decoder.decode(body as Uint8Array);
}
function isReader(value: unknown): value is Deno.Reader {
return typeof value === "object" && value !== null && "read" in value &&
typeof (value as Record<string, unknown>).read === "function";
}
function createMockRequest({
headers,
accepts = (_contentType: string) => {
return true;
},
}: {
headers?: [string, string][];
accepts?: (contentType: string) => boolean;
} = {}): Request {
// deno-lint-ignore no-explicit-any
return { accepts, headers: new Headers(headers) } as any;
}
test({
name: "response empty",
async fn() {
const response = new Response(createMockRequest());
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.body, undefined);
assertEquals(serverResponse.status, 404);
assertEquals(Array.from(serverResponse.headers.entries()).length, 1);
assertEquals(serverResponse.headers.get("Content-Length"), "0");
},
});
test({
name: "response.status set",
async fn() {
const response = new Response(createMockRequest());
response.status = 302;
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.body, undefined);
assertEquals(serverResponse.status, 302);
assertEquals(Array.from(serverResponse.headers.entries()).length, 1);
assertEquals(serverResponse.headers.get("Content-Length"), "0");
},
});
test({
name: "response.body as text",
async fn() {
const response = new Response(createMockRequest());
response.body = "Hello world!";
const serverResponse = await response.toServerResponse();
assertEquals(decodeBody(serverResponse.body), "Hello world!");
assertEquals(serverResponse.status, 200);
assertEquals(
serverResponse.headers.get("content-type"),
"text/plain; charset=utf-8",
);
assertEquals(Array.from(serverResponse.headers.entries()).length, 1);
},
});
test({
name: "response.body as HTML",
async fn() {
const response = new Response(createMockRequest());
response.body = "<!DOCTYPE html><html><body>Hello world!</body></html>";
const serverResponse = await response.toServerResponse();
assertEquals(
decodeBody(serverResponse.body),
"<!DOCTYPE html><html><body>Hello world!</body></html>",
);
assertEquals(serverResponse.status, 200);
assertEquals(
serverResponse.headers.get("content-type"),
"text/html; charset=utf-8",
);
assertEquals(Array.from(serverResponse.headers.entries()).length, 1);
},
});
test({
name: "response.body as JSON",
async fn() {
const response = new Response(createMockRequest());
response.body = { foo: "bar" };
const serverResponse = await response.toServerResponse();
assertEquals(decodeBody(serverResponse.body), `{"foo":"bar"}`);
assertEquals(serverResponse.status, 200);
assertEquals(
serverResponse.headers.get("content-type"),
"application/json; charset=utf-8",
);
assertEquals(Array.from(serverResponse.headers.entries()).length, 1);
},
});
test({
name: "response.body as symbol",
async fn() {
const response = new Response(createMockRequest());
response.body = Symbol("foo");
const serverResponse = await response.toServerResponse();
assertEquals(decodeBody(serverResponse.body), "Symbol(foo)");
assertEquals(serverResponse.status, 200);
assertEquals(
serverResponse.headers.get("content-type"),
"text/plain; charset=utf-8",
);
assertEquals(Array.from(serverResponse.headers.entries()).length, 1);
},
});
test({
name: "response.body as Uint8Array",
async fn() {
const response = new Response(createMockRequest());
response.body = new TextEncoder().encode("Hello world!");
const serverResponse = await response.toServerResponse();
assertEquals(decodeBody(serverResponse.body), "Hello world!");
assertEquals(serverResponse.status, 200);
assertEquals(Array.from(serverResponse.headers.entries()).length, 0);
},
});
test({
name: "response.body as function",
async fn() {
const response = new Response(createMockRequest());
response.body = () => "Hello world!";
const serverResponse = await response.toServerResponse();
assertEquals(decodeBody(serverResponse.body), "Hello world!");
assertEquals(serverResponse.status, 200);
assertEquals(
serverResponse.headers.get("content-type"),
"text/plain; charset=utf-8",
);
assertEquals(Array.from(serverResponse.headers.entries()).length, 1);
},
});
test({
name: "response.body as readable stream",
async fn() {
const response = new Response(createMockRequest());
response.body = new ReadableStream<string>({
start(controller) {
controller.enqueue("hello ");
controller.enqueue("deno");
controller.close();
},
});
const serverResponse = await response.toServerResponse();
assert(isReader(serverResponse.body));
const actual = await readAll(serverResponse.body);
assertEquals(decoder.decode(actual), "hello deno");
assertEquals(serverResponse.status, 200);
},
});
test({
name: "response.body as async iterable",
async fn() {
const response = new Response(createMockRequest());
response.body = {
async *[Symbol.asyncIterator]() {
yield "hello ";
yield "deno";
return;
},
};
const serverResponse = await response.toServerResponse();
assert(isReader(serverResponse.body));
const actual = await readAll(serverResponse.body);
assertEquals(decoder.decode(actual), "hello deno");
assertEquals(serverResponse.status, 200);
},
});
test({
name: "response.body as async function",
async fn() {
const response = new Response(createMockRequest());
response.body = () => Promise.resolve("Hello world!");
const serverResponse = await response.toServerResponse();
assertEquals(decodeBody(serverResponse.body), "Hello world!");
assertEquals(serverResponse.status, 200);
assertEquals(
serverResponse.headers.get("content-type"),
"text/plain; charset=utf-8",
);
assertEquals(Array.from(serverResponse.headers.entries()).length, 1);
},
});
test({
name: "response.type",
async fn() {
const response = new Response(createMockRequest());
response.type = "js";
response.body = "console.log('hello world');";
const serverResponse = await response.toServerResponse();
assertEquals(
decodeBody(serverResponse.body),
"console.log('hello world');",
);
assertEquals(serverResponse.status, 200);
assertEquals(
serverResponse.headers.get("content-type"),
"application/javascript; charset=utf-8",
);
assertEquals(Array.from(serverResponse.headers.entries()).length, 1);
},
});
test({
name: "response.type does not overwrite",
async fn() {
const response = new Response(createMockRequest());
response.type = "js";
response.body = "console.log('hello world');";
response.headers.set("content-type", "text/plain");
const serverResponse = await response.toServerResponse();
assertEquals(
decodeBody(serverResponse.body),
"console.log('hello world');",
);
assertEquals(serverResponse.status, 200);
assertEquals(serverResponse.headers.get("Content-Type"), "text/plain");
assertEquals(Array.from(serverResponse.headers.entries()).length, 1);
},
});
test({
name: "empty response sets contentLength to 0",
async fn() {
const response = new Response(createMockRequest());
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.headers.get("Content-Length"), "0");
},
});
test({
name: "response.redirect('./foo')",
async fn() {
const response = new Response(createMockRequest());
response.redirect("./foo");
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.status, Status.Found);
assertEquals(
decodeBody(serverResponse.body),
`Redirecting to <a href="./foo">./foo</a>.`,
);
assertEquals(serverResponse.headers.get("Location"), "./foo");
assertEquals(
serverResponse.headers?.get("Content-Type"),
"text/html; charset=utf-8",
);
},
});
test({
name: "response.redirect(URL)",
async fn() {
const response = new Response(createMockRequest());
const url = new URL("https://example.com/foo");
response.redirect(url);
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.status, Status.Found);
assertEquals(
decodeBody(serverResponse.body),
`Redirecting to <a href="https://example.com/foo">https://example.com/foo</a>.`,
);
assertEquals(
serverResponse.headers.get("Location"),
"https://example.com/foo",
);
},
});
test({
name: "response.redirect(REDIRECT_BACK)",
async fn() {
const response = new Response(
createMockRequest({ headers: [["referer", "https://example.com/foo"]] }),
);
response.redirect(REDIRECT_BACK);
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.status, Status.Found);
assertEquals(
decodeBody(serverResponse.body),
`Redirecting to <a href="https://example.com/foo">https://example.com/foo</a>.`,
);
assertEquals(
serverResponse.headers.get("Location"),
"https://example.com/foo",
);
},
});
test({
name: "response.redirect(REDIRECT_BACK) no referrer, but alt",
async fn() {
const response = new Response(createMockRequest());
response.redirect(REDIRECT_BACK, new URL("https://example.com/foo"));
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.status, Status.Found);
assertEquals(
decodeBody(serverResponse.body),
`Redirecting to <a href="https://example.com/foo">https://example.com/foo</a>.`,
);
assertEquals(
serverResponse.headers.get("Location"),
"https://example.com/foo",
);
},
});
test({
name: "response.redirect(REDIRECT_BACK) no referrer, no alt",
async fn() {
const response = new Response(createMockRequest());
response.redirect(REDIRECT_BACK);
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.status, Status.Found);
assertEquals(
decodeBody(serverResponse.body),
`Redirecting to <a href="/">/</a>.`,
);
assertEquals(serverResponse.headers.get("Location"), "/");
},
});
test({
name: "response.redirect() no html",
async fn() {
const response = new Response(createMockRequest({
accepts(value) {
return value === "html" ? false : true;
},
}));
response.redirect("https://example.com/foo");
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.status, Status.Found);
assertEquals(
decodeBody(serverResponse.body),
`Redirecting to https://example.com/foo.`,
);
assertEquals(
serverResponse.headers?.get("Location"),
"https://example.com/foo",
);
assertEquals(
serverResponse.headers?.get("Content-Type"),
"text/plain; charset=utf-8",
);
},
});
test({
name: "response.redirect() with url on query string",
async fn() {
const response = new Response(createMockRequest());
response.redirect(
"https://example.com/foo?redirect=https%3A%2F%2Fdeno.land",
);
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.status, Status.Found);
assertEquals(
serverResponse.headers?.get("Location"),
"https://example.com/foo?redirect=https%3A%2F%2Fdeno.land",
);
},
});
test({
name: "response.body() passes Deno.Reader",
async fn() {
const response = new Response(createMockRequest());
const body = new Buffer();
response.body = body;
const serverResponse = await response.toServerResponse();
assert(serverResponse.body === body);
},
});
test({
name: "response.status reflects body state",
fn() {
const response = new Response(createMockRequest());
assertEquals(response.status, Status.NotFound);
response.body = "hello";
assertEquals(response.status, Status.OK);
response.body = null;
assertEquals(response.status, Status.NoContent);
response.status = Status.PartialContent;
assertEquals(response.status, Status.PartialContent);
},
});
test({
name: "response.toServerResponse() is a memo",
async fn() {
const response = new Response(createMockRequest());
const sr1 = await response.toServerResponse();
const sr2 = await response.toServerResponse();
assert(sr1 === sr2);
},
});
test({
name: "response.body cannot be set after server response",
async fn() {
const response = new Response(createMockRequest());
await response.toServerResponse();
assertThrows(() => {
response.body = "";
}, Error);
},
});
test({
name: "response.status cannot be set after server response",
async fn() {
const response = new Response(createMockRequest());
await response.toServerResponse();
assertThrows(() => {
response.status = Status.Found;
}, Error);
},
});
test({
name: "response.body handles null",
async fn() {
const response = new Response(createMockRequest());
response.body = null;
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.status, Status.NoContent);
},
});
test({
name: "response.body handles falsy values",
async fn() {
const response = new Response(createMockRequest());
response.body = 0;
const serverResponse = await response.toServerResponse();
assertEquals(serverResponse.status, Status.OK);
},
});
test({
name: "Response - inspecting",
fn() {
assertEquals(
Deno.inspect(new Response(createMockRequest())),
`Response { body: undefined, headers: Headers {}, status: 404, type: undefined, writable: true }`,
);
},
});