Chai is a BDD/TDD assertion library for Node.js and browsers that can be used with any Javascript testing framework.
Chai is a bdd/tdd assertion library for node.js and browser that can be used with any javascript testing framework.
Questions tagged [chai]
2953 questions
31
votes
2 answers
Post request via Chai
I am trying to make a request to my node JS server which accepts post/put call. The parameters I am trying to send with post call via chai is not visible on server (req.body.myparam).
I have tried with below post request but ended with not…
SCJP1.6 PWR
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31
votes
2 answers
Testing JS exceptions with Mocha/Chai
Trying to test some code that throws an exception with Mocha/Chai, but having no luck, here's the simple code I'm trying to test:
class window.VisualizationsManager
test: ->
throw(new Error 'Oh no')
Here is my test:
describe…
TheDelChop
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30
votes
2 answers
How to provide chai expect with custom error message for mocha unit test?
I have a mocha test using chai's expect:
it("should parse sails out of cache file", async () => {
const sailExtractor = new Extractor();
const result = await sailExtractor.extract("test.xml");
try {
…
k0pernikus
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30
votes
1 answer
How to test event emitters in node
Lets say I want to write this simple task. But I want to write a test validating that:
This task emits object.
Object has a property name.
I'm testing with mocha and chai expect.
Thanks in advance. I've tried every possible variant that came to…
datogio
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29
votes
2 answers
How does the expect().to.be.true work in Chai?
expect(true).to.be.true;
In this code, all the 'to', 'be', 'true' seems to be an attribute of the object response from 'expect(true)'.
How can these attributes work so that they can raise an exception?
wangzi6147
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29
votes
4 answers
How to test react-router with enzyme
I am using enzyme+mocha+chai to test my react-redux project. Enzyme provides shallow to test component behavior. But I didn't find a way to test the router. I am using react-router as below:
...
Joey Yi Zhao
- 37,514
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29
votes
1 answer
mocha, chai, Uncaught AssertionError: expected {} to equal {} + expected - actual
it('GET /customers/ with wrong id', (done) => {
request
.get(`/customers/${wrongId}`)
.end((err, res) => {
expect(res.body).to.equals({});
expect(res).to.have.status(404);
done();
});
});
1)…
Limarenko Denis
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29
votes
3 answers
Chai.js compare arrays without considering order
What I'd like to do is compare 2 arrays of primitives using chai.js, but without considering the order of elements - like if they were 2 sets.
Now obviously I can do something like this:
const actual = ['a', 'b', 'c'];
const expected = ['b', 'c',…
Balázs Édes
- 13,452
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28
votes
1 answer
Add custom http headers to chai requests
I am building an app using node.js and testing with mocha + chai. Is there a way I can add custom headers to my GET and POST chai requests?
For example, I want something like (semi-pseudocode):
chai.request(server)
.get('/api/car/' + data.car_id)
…
Trung Tran
- 13,141
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27
votes
4 answers
TypeError: expect(...).to.startsWith is not a function - chai and chakram
I started writing some automation tests(API)
Now I tried to do to this endpoint:
https://dog.ceo/api/breeds/image/random
so I added into my function
expect(response.body.message).to.startsWith('https://images.dog.ceo/breeds/');
and at the…
Justyna J
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26
votes
1 answer
Asserting object equality in Javascript test (chai)
I need to assert equality between two points in my JavaScript unit tests:
var pnt1 = {x: 2, y: 3};
and
var pnt2 = {x: 2, y: 3};
When I do
assert.equal(pnt1, pnt2);
It says the points are different. Can I exclude from the check the fact that the…
Gianluca Ghettini
- 11,129
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25
votes
1 answer
Chai: assert array includes all items
Is it possible to assert that an array includes multiple specific items using chai?
For example, I would expect this to work:
['foo', 'bar'].should.include(['foo', 'bar'])
Instead chai throws: "expected [ 'foo', 'bar' ] to include [ 'foo', 'bar'…
mockaroodev
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25
votes
2 answers
How do I test if a function calls a specific method/function?
Is there a way in Mocha to test if a function calls a specific method or external function?
I am using Mocha with Chai, but am open to any other assertion libraries.
Ok, so testing whether a methid is being called is pretty easy using sinon. I'm…
hal
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25
votes
5 answers
Chai.js: Object contains/includes
Chai has an include method. I want to test to see if an object contains another object. For example:
var origin = {
name: "John",
otherObj: {
title: "Example"
}
}
I want to use Chai to test if this object contains the following (which it…
user1082754
24
votes
1 answer
TypeError: Cannot read property 'equal' of undefined
I am trying to use enzyme to assert DOM nodes. My Component looks like
import React, {Component} from 'react';
import TransactionListRow from './TransactionListRow';
import {Table, TableBody, TableHeader, TableHeaderColumn, TableRow} from…
daydreamer
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