56 lines
2.0 KiB
TypeScript
56 lines
2.0 KiB
TypeScript
import { html, stubNetwork } from "../helpers.ts";
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import { assert, assertEquals, assertFalse } from "@std/assert";
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import { tryFetchRichContent } from "../../services/rich-content-service.ts";
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Deno.test("tryFetchRichContent: a preview and the post that follows share one fetch", async () => {
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using net = stubNetwork(() => html(`<title>Once</title>`));
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const first = await tryFetchRichContent("https://example.com/once");
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const second = await tryFetchRichContent("https://example.com/once");
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assertEquals(second, first);
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assertEquals(net.calls.length, 1);
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// A refresh always goes to the page.
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await tryFetchRichContent("https://example.com/once", { fresh: true });
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assertEquals(net.calls.length, 2);
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});
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Deno.test("tryFetchRichContent: failures aren't kept", async () => {
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let up = false;
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using net = stubNetwork(() => {
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if (!up) throw new TypeError("connection refused");
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return html(`<title>Up</title>`);
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});
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const url = "https://example.com/flaky";
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assertFalse((await tryFetchRichContent(url)).ok);
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up = true;
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const { ok, content } = await tryFetchRichContent(url);
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assert(ok);
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assertEquals(content?.title, "Up");
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assertEquals(net.calls.length, 2);
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});
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Deno.test("tryFetchRichContent: an unreachable page is ok:false with a stub", async () => {
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using _ = stubNetwork(() => {
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throw new TypeError("connection refused");
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});
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assertEquals(await tryFetchRichContent("https://www.example.com/x"), {
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ok: false,
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content: {
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type: "generic",
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url: "https://www.example.com/x",
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siteName: "example.com",
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},
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});
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});
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Deno.test("tryFetchRichContent: an error page is unreachable, not a preview", async () => {
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using net = stubNetwork(() => html(`<title>404 Not Found</title>`, 404));
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const url = "https://example.com/gone";
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assertEquals(await tryFetchRichContent(url), {
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ok: false,
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content: { type: "generic", url, siteName: "example.com" },
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});
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// Not kept: the page may be back next time.
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await tryFetchRichContent(url);
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assertEquals(net.calls.length, 2);
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});
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