add basic categories to tests

src/__test__/standard/fetchers/simpleProxy.test.ts

@@ -0,0 +1,138 @@
+import { makeSimpleProxyFetcher } from "@/fetchers/simpleProxy";
+import { DefaultedFetcherOptions, FetcherOptions } from "@/fetchers/types";
+import { Headers } from "node-fetch";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+describe("makeSimpleProxyFetcher()", () => {
+  const fetch = vi.fn();
+  const fetcher = makeSimpleProxyFetcher("https://example.com/proxy", fetch);
+
+  afterEach(() => {
+    vi.clearAllMocks();
+  });
+
+  function setResult(type: "text" | "json", value: any) {
+    if (type === 'text') return fetch.mockResolvedValueOnce({
+      headers: new Headers({
+        "content-type": "text/plain",
+      }),
+      status: 204,
+      url: "test123",
+      text() { 
+        return Promise.resolve(value);
+      },
+    });
+    if (type === 'json') return fetch.mockResolvedValueOnce({
+      headers: new Headers({
+        "content-type": "application/json",
+      }),
+      status: 204,
+      url: "test123",
+      json() {
+        return Promise.resolve(value);
+      },
+    });
+  }
+
+  function expectFetchCall(ops: { inputUrl: string, input: DefaultedFetcherOptions, outputUrl?: string, output: any, outputBody: any }) {
+    const prom = fetcher(ops.inputUrl, ops.input);
+    expect((async () => (await prom).body)()).resolves.toEqual(ops.outputBody);
+    expect((async () => (await prom).headers.entries())()).resolves.toEqual((new Headers()).entries());
+    expect((async () => (await prom).statusCode)()).resolves.toEqual(204);
+    expect((async () => (await prom).finalUrl)()).resolves.toEqual("test123");
+    expect(fetch).toBeCalledWith(ops.outputUrl ?? ops.inputUrl, ops.output);
+    vi.clearAllMocks();
+  }
+
+  it('should pass options through', () => {
+    setResult("text", "hello world");
+    expectFetchCall({
+      inputUrl: "https://google.com",
+      input: {
+        method: "GET",
+        query: {},
+        readHeaders: [],
+        headers: {
+          "X-Hello": "world",
+        },
+      },
+      outputUrl: `https://example.com/proxy?destination=${encodeURIComponent('https://google.com/')}`,
+      output: {
+        method: "GET",
+        headers: {
+          "X-Hello": "world",
+        },
+      },
+      outputBody: "hello world"
+    })
+    setResult("text", "hello world");
+    expectFetchCall({
+      inputUrl: "https://google.com",
+      input: {
+        method: "GET",
+        headers: {},
+        readHeaders: [],
+        query: {
+          "a": 'b',
+        }
+      },
+      outputUrl: `https://example.com/proxy?destination=${encodeURIComponent('https://google.com/?a=b')}`,
+      output: {
+        method: "GET",
+        headers: {},
+      },
+      outputBody: "hello world"
+    })
+    setResult("text", "hello world");
+    expectFetchCall({
+      inputUrl: "https://google.com",
+      input: {
+        method: "GET",
+        query: {},
+        readHeaders: [],
+        headers: {},
+      },
+      outputUrl: `https://example.com/proxy?destination=${encodeURIComponent('https://google.com/')}`,
+      output: {
+        method: "GET",
+        headers: {},
+      },
+      outputBody: "hello world"
+    })
+  });
+
+  it('should parse response correctly', () => {
+    setResult("text", "hello world");
+    expectFetchCall({
+      inputUrl: "https://google.com/",
+      input: {
+        method: "POST",
+        query: {},
+        readHeaders: [],
+        headers: {},
+      },
+      outputUrl: `https://example.com/proxy?destination=${encodeURIComponent('https://google.com/')}`,
+      output: {
+        method: "POST",
+        headers: {},
+      },
+      outputBody: "hello world"
+    })
+    setResult("json", { hello: 42 });
+    expectFetchCall({
+      inputUrl: "https://google.com/",
+      input: {
+        method: "POST",
+        query: {},
+        readHeaders: [],
+        headers: {},
+      },
+      outputUrl: `https://example.com/proxy?destination=${encodeURIComponent('https://google.com/')}`,
+      output: {
+        method: "POST",
+        headers: {},
+      },
+      outputBody: { hello: 42 }
+    })
+  });
+});