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mod_test.ts
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mod_test.ts
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import {
assert,
assertEquals,
assertExists,
assertSpyCallArgs,
assertSpyCalls,
describe,
it,
spy,
} from "./_dev_deps.ts";
import conditionalRequests from "./mod.ts";
describe("default export", () => {
it("should exists", () => {
assertExists(conditionalRequests);
});
it("should return next response if the request is not selection or modification method", async () => {
const selectRepresentation = spy(() => new Response());
const middleware = conditionalRequests(selectRepresentation);
const conditionalRequest = new Request("test:", {
method: "OPTIONS",
});
const newResponse = new Response();
const handler = spy(() => newResponse);
const response = await middleware(conditionalRequest, handler);
assertSpyCalls(selectRepresentation, 0);
assertSpyCalls(handler, 1);
assert(newResponse === response);
});
it("should return next response if the filtered preconditions is empty", async () => {
const selectedRepresentation = new Response("<body>", {
headers: { etag: "<etag>" },
});
const selectRepresentation = spy(() => selectedRepresentation);
const middleware = conditionalRequests(selectRepresentation, {
preconditions: [],
});
const conditionalRequest = new Request("test:", {
headers: { "if-none-match": "<etag>" },
});
const handler = spy(() => selectedRepresentation);
const response = await middleware(conditionalRequest, handler);
assertSpyCalls(selectRepresentation, 0);
assertSpyCalls(handler, 1);
assert(selectedRepresentation === response);
});
it("should return next response if the preconditions does match", async () => {
const selectedRepresentation = new Response("<body>", {
headers: { etag: "<etag>" },
});
const selectRepresentation = spy(() => selectedRepresentation);
const middleware = conditionalRequests(selectRepresentation, {
preconditions: [{
header: "if-none-match",
evaluate: () => true,
respond: () => new Response(),
}],
});
const conditionalRequest = new Request("test:", {
headers: { "if-none-match": "<etag>" },
});
const handler = spy(() => selectedRepresentation);
const response = await middleware(conditionalRequest, handler);
assertSpyCalls(selectRepresentation, 1);
assertSpyCalls(handler, 1);
assert(selectedRepresentation === response);
});
it("should return precondition defined response if the precondition match", async () => {
const selectedRepresentation = new Response("<body>", {
headers: { etag: "<etag>" },
});
const selectRepresentation = spy(() => selectedRepresentation);
const middleware = conditionalRequests(selectRepresentation);
const conditionalRequest = new Request("test:", {
headers: { "if-none-match": "<etag>" },
});
const handler = spy(() => selectedRepresentation);
const response = await middleware(conditionalRequest, handler);
assertSpyCalls(handler, 0);
assertSpyCalls(selectRepresentation, 1);
assertEquals(response.status, 304);
});
it("should handler multiple precondition", async () => {
const selectedRepresentation = new Response("<body>", {
headers: { etag: "<etag>" },
});
const selectRepresentation = spy(() => selectedRepresentation);
const store = spy((_: string) => true);
const middleware = conditionalRequests(selectRepresentation, {
preconditions: [{
header: "if-none-match",
evaluate: () => {
return store("if-none-match");
},
respond: () => new Response(),
}, {
header: "if-match",
evaluate: () => {
return store("if-match");
},
respond: () => new Response(),
}],
});
const conditionalRequest = new Request("test:", {
headers: { "if-none-match": "<etag>", "if-match": "<etag>" },
});
const handler = spy(() => selectedRepresentation);
const response = await middleware(conditionalRequest, handler);
assertSpyCallArgs(store, 0, ["if-match"]);
assertSpyCallArgs(store, 1, ["if-none-match"]);
assertSpyCalls(handler, 1);
assertSpyCalls(selectRepresentation, 1);
assert(response === selectedRepresentation);
});
});