Stub methods on any instance of a class in Rspec 1 and Rspec 2
RSpec 1 (Rails 2)
With the most recent spec_candy.rb
helpers you can say:
User.stub_any_instance(:foo => :bar)
user = User.new
user.foo
# => :bar
RSpec 2 (Rails 3)
RSpec 2 comes with this feature built in:
User.any_instance.stub(:foo => :bar)
user = User.new
user.foo
# => :bar
RSpec 3
RSpec Mocks 3.3: any_instance Show archive.org snapshot
allow_any_instance_of(User).to receive(:foo).and_return(:bar)
user = User.new
user.foo
# => :bar
Related cards:
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...
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...
JavaScript without jQuery (presentation from 2019-01-21)
Summary
- We want to move away from jQuery in future projects
- Motivations are performance, bundle size and general trends for the web platform.
- The native DOM API is much nicer than it used to be, and we can polyfill the missing pieces
- Un...
Lightning Talk: Coverage based Test Case Prioritization in Ruby on Rails
For my computer science bachelor's thesis I programmed and evaluated a CLI Test Case Prioritization (TCP) tool for makandra. It has been written as a Ruby Gem and was tested and evaluated against one Ruby on Rails project....
Video transcoding: Web and native playback overview (April 2020)
Intro
Embedding videos on a website is very easy, add a <video>
tag to your source code and it just works. Most of the time.
The thing is: Both the **operating system and Browser of your client must support the container ...
Async control flow in JavaScript: Promises, Microtasks, async/await
Slides for Henning's talk on Sep 21st 2017.
Understanding sync vs. async control flow
Talking to synchronous (or "blocking") API
print('script start')
html = get('/foo')
print(html)
print('s...
How to make changes to a Ruby gem (as a Rails developer)
At makandra, we've built a few gems over the years. Some of these are quite popular: spreewald (> 1M downloads), active_type (> 1M downloads), and geordi (> 200k downloads)
Developing a Ruby gem is different from developing Rails applications, w...
How to view Image Metadata on the Linux Command Line with ImageMagick
ImageMagick has a command line tool called identify
which can read image metadata:
>identify -verbose DSC00136.JPG
Image: DSC00136.JPG
Format: JPEG (Joint Photographic Experts Group JFIF format)
Class: DirectClass
Geometry: 5472x3648+...
How to create giant memory leaks in AngularJS (and other client-side JavaScript)
This guide shows how to create an AngularJS application that consumes more and more memory until, eventually, the browser process crashes on your users.
Although this guide has been written for Angular 1 originally, most of the advice is relevant...
Delivering Carrierwave attachments to authorized users only
Preparation
To attach files to your records, you will need a new database column representing the filename of the file. To do this, add a new migration (rails g migration <name>
) with the following content:
class AddAttachmentToNotes...