You can use the code below to check whether the browser can make connections to the current site: await isOnline...
When changing code in mailers, updating the corresponding mailer preview can be forgotten very easily. Mailer previews can be tested...
When redirecting you should take care to use the right HTTP status code. From controllers When redirecting from a controller...
It might sometimes be useful to check whether your Rails application accesses the file system unnecessarily, for example if your...
I recently had the problem that embedded code boxes crashed my layout. It turned out that pres break out of...
Code quality can be measured in four levels: (Working code) Reliable code (minimum) Readable code (ok for short-lived code...
There is a way to use multiple databases in Rails. You may have asked yourself how you're able to...
You can use Unpoly's up.on with a named listener function and immediately unbind this event listener with { once: true...
ruby-warning adds custom processing for warnings, including the ability to ignore specific warning messages, ignore warnings in specific files/directories...
Due to the way we setup Jasmine tests in our projects, you may run into various errors when Jasmine boots...
Redis.current will be removed without replacement in redis-rb 5.0. Version 4.6.0 adds deprecation warnings for Redis.current and Redis.current=: `Redis.current...
While we are used to run our JavaScript tests on a test page within our Browser, it's also possible...
I recently was in a weird situation where my (Jest/CLI) tests were referencing a function that was no longer part...
RSpec's let allows you to super into "outside" definitions, in parent contexts. Example: describe '#save' do subject { described_class.new(attributes...
To ensure a consistent code style for JavaScript code, we use ESLint. The workflow is similar to integrating rubocop...
Sometimes we write plain SQL queries in migrations so we don't have to mock ActiveRecord classes. These two migrations...
We use foreman to start all necessary processes for an application, which are declared in a Procfile. This is very...
Building application assets with esbuild is the new way to do it, and it's great, especially in combination with...
When Capybara locates elements in the DOM, by default it allows only accessing visible elements -- when you are using a...
Since Rails 6.1, if we use where.not with multiple attributes, it applies logical NAND (NOT(A) OR NOT(B)) instead...
You can use RSpec::Matchers.define_negated_matcher to define a negated version of an existing matcher. This is particularly useful...
In my case [...] the catalog is an XML that contains all kinds of possible products, categories and vendors and it...
Field error steps Spreewald's The...
...field should have an error and The...
...field should have the error...
...steps now...
The Interactive Advertising Bureau (IAB) is a European marketing association which has introduced a standard how advertising can be served...