Jasmine: Testing if two arrays contain the same elements
When the order matters:
expect(array1).toEqual(array2)
Regardless of order:
expect(array1).toEqual(jasmine.arrayWithExactContents(array2))
Ignoring extra elements:
expect(array1).toEqual(jasmine.arrayContaining(array2))
Related cards:
Check if two arrays contain the same elements in Ruby, RSpec or Test::Unit
RSpec 1, RSpec 2
To test whether two arrays have the same elements regardless of order, RSpec 1 and 2 give you the =~ matcher:
actual_array.should =~ expected_array
Rspec 3
With RSpec 3's expect s...
The Ruby Object Model
In Ruby (almost) everything is an Object. While this enables a lot of powerful features, this concept might be confusing for developers who have been programming in more static languages, such as Java or C#. This card should help understanding t...
How can you detect if two regular expressions overlap in the strings they can match? - Stack Overflow
I have a container of regular expressions. I'd like to analyze them to determine if it's possible to generate a string that matches more than 1 of them. Short of writing my own regex engine with this use case in mind, is there an easy way in C++ o...
Jasmine: Testing AJAX calls that manipulate the DOM
Here is a Javascript function reloadUsers() that fetches a HTML snippet from the server using AJAX and replaces the current .users container in the DOM:
window.reloadUsers = ->
$.get('/users').then (html) ->
$('.users').html(h...
RSpec matcher to check if two numbers are the same
You can usually just use the eq matched to compare two numbers:
expect(deal.total).to eq(120)
If the actual value is a BigDecimal, you might have issues when you match it against a Float:
expect(deal.total_price).to eq(1200.99...
jQuery promises: done() and then() are not the same
jQuery's deferred objects behave somewhat like standard promises, but not really.
One of many subtle differences is that there are two ways to chain callbacks to an async fu...
VCR fails if the same request is triggered multiple times
Same requests are recorded only once in vcr. Replaying a test fails, if you trigger the same request multiple times. The error message is somehow confusing, as your cassette contains the request:
`An HTTP request has...
CSS: Matching against attributes and their values (or parts of them)
You probably know that you can use CSS selectors to match against elements and their attributes, such as:
a[title] { /* any <a> that has a "title" */ }
a[data-fancy="true"] { /* any <a> that has their "data-fancy" attribute set to "true" *...
Testing if two date ranges overlap in Ruby or Rails
A check if two date or time ranges A and B overlap needs to cover a lot of cases:
- A partially overlaps B
- A surrounds B
- B surrounds A
- A occurs entirely after B
- B occurs entirely after A
This means you actually have to check that:
...
The JavaScript Object Model: A deep dive into prototypes and properties
Speaker today is Henning Koch, Head of Development at makandra.
This talk will be in German with English slides.
Introduction
As web developers we work with JavaScript every day, even when our backend code uses anothe...