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isomorphic.test.js
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155 lines (136 loc) · 4.05 KB
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import fs from "fs";
import vm from "vm";
describe("isomorphic-unfetch", () => {
describe('"browser" entry', () => {
it("should resolve to fetch when window.fetch exists", () => {
function fetch() {
return this;
}
function unfetch() {}
let sandbox = {
process: undefined,
window: { fetch },
fetch,
exports: {},
require: () => unfetch,
};
sandbox.global = sandbox.self = sandbox.window;
sandbox.module = { exports: sandbox.exports };
let filename = require.resolve(
"../packages/isomorphic-unfetch/browser.js"
);
vm.runInNewContext(fs.readFileSync(filename, "utf8"), sandbox, filename);
expect(sandbox.module.exports).toBe(fetch);
});
it("should resolve to unfetch when window.fetch does not exist", () => {
function unfetch() {}
let sandbox = {
process: undefined,
window: {},
exports: {},
require: () => unfetch,
};
sandbox.global = sandbox.self = sandbox.window;
sandbox.module = { exports: sandbox.exports };
let filename = require.resolve(
"../packages/isomorphic-unfetch/browser.js"
);
vm.runInNewContext(fs.readFileSync(filename, "utf8"), sandbox, filename);
expect(sandbox.module.exports).toBe(unfetch);
});
});
describe('"main" entry', () => {
it("should resolve to fetch when window.fetch exists", () => {
function fetch() {
return this;
}
function unfetch() {}
let sandbox = {
process: undefined,
window: { fetch },
fetch,
exports: {},
require: () => unfetch,
};
sandbox.global = sandbox.self = sandbox.window;
sandbox.module = { exports: sandbox.exports };
let filename = require.resolve("../packages/isomorphic-unfetch");
vm.runInNewContext(fs.readFileSync(filename, "utf8"), sandbox, filename);
expect(sandbox.module.exports).toBe(fetch);
});
it("should resolve to unfetch when window.fetch does not exist", () => {
function unfetch() {}
let sandbox = {
process: undefined,
window: {},
exports: {},
require: () => unfetch,
};
sandbox.global = sandbox.self = sandbox.window;
sandbox.module = { exports: sandbox.exports };
let filename = require.resolve("../packages/isomorphic-unfetch");
vm.runInNewContext(fs.readFileSync(filename, "utf8"), sandbox, filename);
expect(sandbox.module.exports).toBe(unfetch);
});
});
describe('"main" entry in NodeJS', () => {
it("should resolve to fetch when window.fetch exists", () => {
function fetch() {
return this;
}
function unfetch() {}
let sandbox = {
process: {},
global: { fetch },
exports: {},
require: () => unfetch,
};
sandbox.module = { exports: sandbox.exports };
let filename = require.resolve("../packages/isomorphic-unfetch");
vm.runInNewContext(fs.readFileSync(filename, "utf8"), sandbox, filename);
expect(sandbox.module.exports).toBe(fetch);
});
it("should resolve to unfetch when window.fetch does not exist", async () => {
let modules = {
unfetch() {},
"node-fetch": {
default: function nodeFetch(url) {
return "hello from node-fetch";
},
},
};
let sandbox = {
process: {},
global: {
fetch: null,
},
exports: {},
require: (module) => modules[module],
};
sandbox.global.process = sandbox.process;
sandbox.module = { exports: sandbox.exports };
let filename = require
.resolve("../packages/isomorphic-unfetch")
.replace(/\.js$/, ".mjs");
const context = vm.createContext(sandbox);
const mod = new vm.SourceTextModule(fs.readFileSync(filename, "utf8"), {
context,
async importModuleDynamically(specifier, script, assertions) {
const exp = modules[specifier];
const module = new vm.SyntheticModule(Object.keys(exp), () => {
for (let key in exp) module.setExport(key, exp[key]);
});
await module.link(() => {});
await module.evaluate();
return module;
},
});
await mod.link(() => {});
await mod.evaluate();
const ns = mod.namespace;
expect(await ns.default("/")).toBe(
await modules["node-fetch"].default("/")
);
});
});
});