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Added tests for fetch-middlewares
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149
tests/unit/utils/net/fetch-middlewares.spec.ts
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149
tests/unit/utils/net/fetch-middlewares.spec.ts
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import { HttpResponse } from "@/utils/net/http-response";
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import { HttpError } from "@/utils/errors";
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import { defaultResponse, simpleCache, throwOnError } from "@/utils/net/fetch-middlewares";
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describe("defaultResponse", () => {
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test("returns default response when filter condition is met", async () => {
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const middleware = defaultResponse({
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filter: x => x.status === 404,
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response: x => HttpResponse.text("Foo", x),
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});
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const next = jest.fn().mockResolvedValue(HttpResponse.text("Foo", { status: 404 }));
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const response = await middleware("http://example.com/", {}, next);
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const responseText = await response.text();
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expect(next).toBeCalledWith("http://example.com/", {});
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expect(response.status).toBe(404);
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expect(responseText).toBe("Foo");
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});
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test("returns original response when filter condition is not met", async () => {
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const middleware = defaultResponse({
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filter: x => x.status === 404,
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response: x => HttpResponse.text("Foo", x),
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});
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const next = jest.fn().mockResolvedValue(HttpResponse.text("Success", { status: 200 }));
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const response = await middleware("http://example.com/", {}, next);
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const responseText = await response.text();
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expect(next).toBeCalledWith("http://example.com/", {});
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expect(response.status).toBe(200);
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expect(responseText).toBe("Success");
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});
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test("uses default filter and response factory when options are not provided", async () => {
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const middleware = defaultResponse();
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const next = jest.fn().mockResolvedValue(HttpResponse.text("Foo", { status: 404 }));
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const response = await middleware("http://example.com/", {}, next);
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const responseText = await response.text();
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expect(next).toBeCalledWith("http://example.com/", {});
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expect(response.status).toBe(404);
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expect(responseText).toBe("");
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});
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});
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describe("throwOnError", () => {
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test("throws error when filter condition is met", async () => {
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const middleware = throwOnError({
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filter: x => x.status === 404,
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error: x => new Error(`HTTP Error: ${x.status}`),
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});
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const next = jest.fn().mockResolvedValue(HttpResponse.text("Foo", { status: 404 }));
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const responsePromise = middleware("http://example.com/", {}, next);
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await expect(responsePromise).rejects.toThrow("HTTP Error: 404");
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expect(next).toBeCalledWith("http://example.com/", {});
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});
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test("returns original response when filter condition is not met", async () => {
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const middleware = throwOnError({
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filter: x => x.status === 404,
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error: x => new Error(`HTTP Error: ${x.status}`),
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});
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const next = jest.fn().mockResolvedValue(HttpResponse.text("Success", { status: 200 }));
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const response = await middleware("http://example.com/", {}, next);
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const responseText = await response.text();
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expect(next).toBeCalledWith("http://example.com/", {});
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expect(response.status).toBe(200);
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expect(responseText).toBe("Success");
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});
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test("uses default filter and error factory when options are not provided", async () => {
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const middleware = throwOnError();
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const next = jest.fn().mockResolvedValue(HttpResponse.text("Foo", { status: 404 }));
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const responsePromise = middleware("http://example.com/", {}, next);
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await expect(responsePromise).rejects.toThrow(HttpError);
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expect(next).toBeCalledWith("http://example.com/", {});
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});
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});
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describe("simpleCache", () => {
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test("returns cached response when filter condition is met", async () => {
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const middleware = simpleCache({
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filter: url => String(url).includes("useCache=true"),
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comparer: ([urlA, { method: methodA }], [urlB, { method: methodB }]) => String(urlA) === String(urlB) && methodA === methodB,
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});
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const next = jest.fn().mockResolvedValue(HttpResponse.text("Cached", { status: 200 }));
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const response1 = await middleware("http://example.com/?useCache=true", {}, next);
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const responseText1 = await response1.text();
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const response2 = await middleware("http://example.com/?useCache=true", {}, next);
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const responseText2 = await response2.text();
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expect(next).toBeCalledTimes(1);
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expect(response1.status).toBe(200);
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expect(responseText1).toBe("Cached");
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expect(response2.status).toBe(200);
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expect(responseText2).toBe("Cached");
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});
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test("returns new response when filter condition is not met", async () => {
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const middleware = simpleCache({
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filter: url => String(url).includes("useCache=true"),
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comparer: ([urlA, { method: methodA }], [urlB, { method: methodB }]) => String(urlA) === String(urlB) && methodA === methodB,
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});
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const next = jest.fn().mockImplementation(() => Promise.resolve(HttpResponse.text("Not Cached", { status: 200 })));
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const response1 = await middleware("http://example.com/", {}, next);
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const responseText1 = await response1.text();
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const response2 = await middleware("http://example.com/", {}, next);
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const responseText2 = await response2.text();
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expect(next).toBeCalledTimes(2);
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expect(response1.status).toBe(200);
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expect(responseText1).toBe("Not Cached");
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expect(response2.status).toBe(200);
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expect(responseText2).toBe("Not Cached");
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});
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test("uses default filter and comparer when options are not provided", async () => {
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const middleware = simpleCache();
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const next = jest.fn().mockResolvedValue(HttpResponse.text("Cached", { status: 200 }));
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const response1 = await middleware("http://example.com/?cache=true", {}, next);
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const responseText1 = await response1.text();
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const response2 = await middleware("http://example.com/?cache=true", {}, next);
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const responseText2 = await response2.text();
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expect(next).toBeCalledTimes(1);
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expect(response1.status).toBe(200);
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expect(responseText1).toBe("Cached");
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expect(response2.status).toBe(200);
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expect(responseText2).toBe("Cached");
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});
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});
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