score:1
have a look at manual mocks guide in jest documentation.
you can create a folder called __mocks__
and replicate the modules that you want to mock there.
for example, i have a main.js file with:
let { chance } = require("chance");
let chance = chance();
function createuser() {
return {
id: chance.guid(),
name: chance.name(),
age: chance.age(),
};
}
module.exports = { createuser };
i create a main.test.js file with:
let { createuser } = require("./main");
test("creates a new user", () => {
let scenario = createuser();
expect(scenario).tomatchobject({
id: "zxcv",
name: "foo",
age: 20,
});
});
now i can create a file in __mocks__/chance.js
with the same signature to mock my module chance
:
let chance = {};
chance.chance = function () {
return {
guid: () => "zxcv",
name: () => "foo",
age: () => 20,
};
};
module.exports = chance;
now, every file you test that require/import chance
, will use this mock by default.
Source: stackoverflow.com
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