mocking in Vitest: how to conditionally modify a mocked imported function’s behavior
(This was not apparent at all despite an hour or two looking through Vitest’s docs…)
Posts by Tag
Vaguely organized by tag:
- javascript 10
- CLI 6
- git 5
- howto 5
- version control 4
- toki pona 4
- vim 3
- MacOS 3
- conference 3
- code archaeology 3
- testing 3
- orthography 3
- code 3
- tooling 2
- UI 2
- bug 2
- workaround 2
- agile 2
- elixir 2
- TDD 2
- developer tools 2
- keyboards 2
- continuous integration 2
- versioning 2
- notes to self 2
- dependencies 2
- Ogham 2
- fonts 1
- eyecandy 1
- requirejs 1
- unix 1
- shortcuts 1
- efficiency 1
- iTunes 1
- nomenclature 1
- trivia 1
- retrospective 1
- dock 1
- Erlang Factory 1
- CI 1
- Google Chrome 1
- network 1
- filters 1
- spacemacs 1
- emacs 1
- joke 1
- punctuation 1
- ElixirConf 1
- google 1
- brew 1
- static analysis 1
- future-proofing 1
- documentation 1
- standards 1
- communication 1
- NPM 1
- npmCamp 1
- iOS 1
- merge conflicts 1
- eslint 1
- ecmascript 1
- linting 1
- HapiJS 1
- SEO 1
- charts 1
- chickens 1
- eggs 1
- time series 1
- meta 1
- almost-dead-net 1
- advertising 1
- browsers 1
- dontdo 1
- cypress.io 1
- gatsby 1
- web 1
- Bleacher Report 1
- SDLC 1
- monolith 1
- microservices 1
- Ruby on Rails 1
- diff 1
- github 1
- browser hack 1
- npm 1
- lockfile 1
- mystery 1
- standup 1
- from the archives 1
- NodeJS 1
- tests 1
- languages 1
- emoji 1
- techdebt 1
- software management 1
- sitelen sitelen 1
- lojban 1
- cypress 1
- svelte 1
- vitest 1
javascript
Cypress component testing with Svelte v5 (and SvelteKit)
Version 5 of Svelte makes some dramatic changes in its API. Cypress component testing already doesn’t play nicely with SvelteKit, and Svelte v5 doesn’t make ...
Setting up SvelteKit to use SQLite and prerender a static site to be hosted on GitLab Pages
I started with npm init vite and picked a SvelteKit project (using TypeScript).
framework-less CLI TDD with NPM* OMG LOL
* no this does not involve npm, it just made the title look good 🤷
npm ci with legacy-peer-deps is a thing
So you’ve got a JavaScript project in the wild, and real life happens so you’ve been npm installing with the --legacy-peer-deps for a little while now. No ju...
how to run React on top of Ruby-on-Rails
… don’t do it!
logging meta tags
Sure can be annoying looking through HTML source trying to find all the <meta name="whatever" content="something that search engines love" /> tags that...
hapi — unset a cookie
…because the documentation for Hapi is awful:
eslint — Cannot read property ‘value’ of undefined
Are you seeing ESLint throwing an error like
CLI
framework-less CLI TDD with NPM* OMG LOL
* no this does not involve npm, it just made the title look good 🤷
open Mac application from the command-line
Today I Learned about the -a flag in MacOS’s open command-line application. It lets you specify the name of an app in /Applications (without the .app ending)...
La trahison des mots
Run this in your (POSIX-compliant) shell — I promise it’s not bad:
watch some files, and run something whenever they change
For the next time I forget what this tool is called:
killing processes
Signals to try in order: 1, 15, 2, only then 9
setting up fancy fonts for vim in iTerm
Might need a patched font to get the fancy glyphs, e.g. Inconsolata for Powerline
git
creating a new Git repo based on the history of an old one
Following this how-to by Nassos Michas…
Git archaeology tips
TLDR: history of a deleted/moved file: git log -- path/to/deleted-file find all commits which include a given string in the diff: git log -S string ig...
how to find the merge where your code disappeared
Because I keep forgetting that I originally put this on the twitters…
don’t be scared of merge conflicts
First things first: it can be a lot easier to resolve merge conflicts when you can see what the code looked like before the edits which are now conflicting. ...
search Git history, ignoring certain directory
Ever wanted to look through a Git repository’s history for a commits involving a specific string, but ignoring a certain directory (e.g. for packaged/built c...
howto
mocking in Vitest: how to conditionally modify a mocked imported function’s behavior
(This was not apparent at all despite an hour or two looking through Vitest’s docs…)
Cypress component testing with Svelte v5 (and SvelteKit)
Version 5 of Svelte makes some dramatic changes in its API. Cypress component testing already doesn’t play nicely with SvelteKit, and Svelte v5 doesn’t make ...
Setting up SvelteKit to use SQLite and prerender a static site to be hosted on GitLab Pages
I started with npm init vite and picked a SvelteKit project (using TypeScript).
how to run React on top of Ruby-on-Rails
… don’t do it!
One Weird Trick to Easily Remove (maybe) Anything from a Webpage
If you are using a desktop (not mobile/tablet) Mozilla Firefox or Brave Browser (or Google Chrome or another browser based on Chromium), here’s a quick way t...
version control
Git archaeology tips
TLDR: history of a deleted/moved file: git log -- path/to/deleted-file find all commits which include a given string in the diff: git log -S string ig...
version control commit messages
Here is how I like to structure my Git branches and commit messages.
linking to code? always use an href which is tied to a specific commit
tl;dr Don’t use links like github.com/owner/repo/blob/master/file.ext#L13 because that branch will change! Use github.com/owner/repo/blob/COMMIT_SHA/file.ext...
search Git history, ignoring certain directory
Ever wanted to look through a Git repository’s history for a commits involving a specific string, but ignoring a certain directory (e.g. for packaged/built c...
toki pona
Oghamic Toki Pona
It worked for Lojban so of course it’ll work for Toki Pona, right?!?
a Vim syntax file for Toki Pona
a a ilo Vim la mi pali e lipu kute pi nimi kule
nasin pi lipu nimi
A thought experiment: how might one use a toki pona reference document which only uses sitelen sitelen?
👈 ⏮️ 🧠 🗣 ⏩ 🗣 👍
👋 👤 ♾️ ➗️ 🗣 ❗️ ⏰ 👇 🔼 ➗️ 👈 ⏮️ 🧠 🗣 ⏩ 🗣 👍 ❗️
vim
a Vim syntax file for Toki Pona
a a ilo Vim la mi pali e lipu kute pi nimi kule
getting started with Spacemacs
Are you a vi/vim user who’s been hearing about how wonderful/useful/fast Spacemacs can be? Here is an evolving list of pointers for folks beginning to use th...
setting up fancy fonts for vim in iTerm
Might need a patched font to get the fancy glyphs, e.g. Inconsolata for Powerline
MacOS
open Mac application from the command-line
Today I Learned about the -a flag in MacOS’s open command-line application. It lets you specify the name of an app in /Applications (without the .app ending)...
typing an ellipsis in OS X
Ever find yourself wanting to type a literal ellipsis, like this? …
jiggling the handle of OS X 10.8.5’s dock
About once a week now, I’ll notice that the Dock on my Macbook (running 10.8.5) no longer auto-shows itself when hovering at the bottom of the screen.
conference
notes for npmCamp 2016
Isaac Schlueter
ElixirConf US 2015 notes
ElixirConf US 2015 was October 2–3 in Austin, Texas.
notes — Erlang Factory 2015
José: What Elixir Is About
code archaeology
Git archaeology tips
TLDR: history of a deleted/moved file: git log -- path/to/deleted-file find all commits which include a given string in the diff: git log -S string ig...
how to find the merge where your code disappeared
Because I keep forgetting that I originally put this on the twitters…
search Git history, ignoring certain directory
Ever wanted to look through a Git repository’s history for a commits involving a specific string, but ignoring a certain directory (e.g. for packaged/built c...
testing
mocking in Vitest: how to conditionally modify a mocked imported function’s behavior
(This was not apparent at all despite an hour or two looking through Vitest’s docs…)
Cypress component testing with Svelte v5 (and SvelteKit)
Version 5 of Svelte makes some dramatic changes in its API. Cypress component testing already doesn’t play nicely with SvelteKit, and Svelte v5 doesn’t make ...
upgrading Cypress to v10 within a Gatsby project
Cypress v10 is out, and it makes some big changes. It comes with a real handy migration guide built into the cypress open command, which is nice! But the com...
orthography
Oghamic Toki Pona
It worked for Lojban so of course it’ll work for Toki Pona, right?!?
Oghamic Lojban
Haven’t you always wanted to write Lojban using Ogham letters? .i’isai — Me too!
nasin pi lipu nimi
A thought experiment: how might one use a toki pona reference document which only uses sitelen sitelen?
code
mocking in Vitest: how to conditionally modify a mocked imported function’s behavior
(This was not apparent at all despite an hour or two looking through Vitest’s docs…)
Cypress component testing with Svelte v5 (and SvelteKit)
Version 5 of Svelte makes some dramatic changes in its API. Cypress component testing already doesn’t play nicely with SvelteKit, and Svelte v5 doesn’t make ...
Setting up SvelteKit to use SQLite and prerender a static site to be hosted on GitLab Pages
I started with npm init vite and picked a SvelteKit project (using TypeScript).
tooling
wanted — a replacement for actionitems.us
In 2011 the dev team I was on went to Pivotal Labs for a few months to bootstrap a rebuild of our company’s site, and learn their style of “extreme programmi...
Sharpening Your Tools
…is an episode of the Ruby Rogues podcast, #129 with Ben Orenstein (who has spent some of his time being the host of Thoughtbot’s Giant Robots podcast). In t...
UI
how to mark an email as “not-spam” in Google’s Inbox
I’m using Google’s Inbox mail client for work email. Recently I noticed that an email in a thread was marked as being spam, and couldn’t find a way to tell I...
sometimes iTunes doesn’t show the currently-playing song’s name and position
In the middle of the very top of iTunes, between the play/volume controls on the left and the search bar on the right, there’s a panel that normally shows th...
bug
jiggling the handle of OS X 10.8.5’s dock
About once a week now, I’ll notice that the Dock on my Macbook (running 10.8.5) no longer auto-shows itself when hovering at the bottom of the screen.
sometimes iTunes doesn’t show the currently-playing song’s name and position
In the middle of the very top of iTunes, between the play/volume controls on the left and the search bar on the right, there’s a panel that normally shows th...
workaround
jiggling the handle of OS X 10.8.5’s dock
About once a week now, I’ll notice that the Dock on my Macbook (running 10.8.5) no longer auto-shows itself when hovering at the bottom of the screen.
sometimes iTunes doesn’t show the currently-playing song’s name and position
In the middle of the very top of iTunes, between the play/volume controls on the left and the search bar on the right, there’s a panel that normally shows th...
agile
how to consistently pay back dependency tech-debt in an Agile environment
tldr: make a ‘recursive’ ticket which you continually schedule for future sprints… Product will hate it initially, but will love it eventually
wanted — a replacement for actionitems.us
In 2011 the dev team I was on went to Pivotal Labs for a few months to bootstrap a rebuild of our company’s site, and learn their style of “extreme programmi...
elixir
ElixirConf US 2015 notes
ElixirConf US 2015 was October 2–3 in Austin, Texas.
notes — Erlang Factory 2015
José: What Elixir Is About
TDD
framework-less CLI TDD with NPM* OMG LOL
* no this does not involve npm, it just made the title look good 🤷
only show single branch status in CI status feeds
CCMenu is a neat little menu icon which shows the build status of your projects on Travis CI, CircleCI, or many other automated build services.
developer tools
One Weird Trick to Easily Remove (maybe) Anything from a Webpage
If you are using a desktop (not mobile/tablet) Mozilla Firefox or Brave Browser (or Google Chrome or another browser based on Chromium), here’s a quick way t...
advanced filtering in Chrome’s Network dev tools
Google Chrome has some nice developer tools. The Network tab in there lets you see requests and their headers, responses, initiators, and much more. Being ab...
keyboards
use a Dvorak keyboard layout on iOS Simulator
…why would anyone want to have Dvorak on a mobile device?!? Actually, I only care about it in the iOS Simulator, when I’m using it on a computer with a real-...
typing an ellipsis in OS X
Ever find yourself wanting to type a literal ellipsis, like this? …
continuous integration
npm ci with legacy-peer-deps is a thing
So you’ve got a JavaScript project in the wild, and real life happens so you’ve been npm installing with the --legacy-peer-deps for a little while now. No ju...
getting Hound-CI to show Rubocop “cop names” again
Thoughtbot’s Hound-CI service runs Rubocop on Ruby projects. It had a setting to show the name of the “cop” (style rule) that failed, which made it easier to...
versioning
how to find the merge where your code disappeared
Because I keep forgetting that I originally put this on the twitters…
don’t be scared of merge conflicts
First things first: it can be a lot easier to resolve merge conflicts when you can see what the code looked like before the edits which are now conflicting. ...
notes to self
hapi — unset a cookie
…because the documentation for Hapi is awful:
eslint — Cannot read property ‘value’ of undefined
Are you seeing ESLint throwing an error like
dependencies
how to consistently pay back dependency tech-debt in an Agile environment
tldr: make a ‘recursive’ ticket which you continually schedule for future sprints… Product will hate it initially, but will love it eventually
npm ci with legacy-peer-deps is a thing
So you’ve got a JavaScript project in the wild, and real life happens so you’ve been npm installing with the --legacy-peer-deps for a little while now. No ju...
Ogham
Oghamic Toki Pona
It worked for Lojban so of course it’ll work for Toki Pona, right?!?
Oghamic Lojban
Haven’t you always wanted to write Lojban using Ogham letters? .i’isai — Me too!
fonts
setting up fancy fonts for vim in iTerm
Might need a patched font to get the fancy glyphs, e.g. Inconsolata for Powerline
eyecandy
setting up fancy fonts for vim in iTerm
Might need a patched font to get the fancy glyphs, e.g. Inconsolata for Powerline
requirejs
Back to Top ↑unix
killing processes
Signals to try in order: 1, 15, 2, only then 9
shortcuts
Sharpening Your Tools
…is an episode of the Ruby Rogues podcast, #129 with Ben Orenstein (who has spent some of his time being the host of Thoughtbot’s Giant Robots podcast). In t...
efficiency
Sharpening Your Tools
…is an episode of the Ruby Rogues podcast, #129 with Ben Orenstein (who has spent some of his time being the host of Thoughtbot’s Giant Robots podcast). In t...
iTunes
sometimes iTunes doesn’t show the currently-playing song’s name and position
In the middle of the very top of iTunes, between the play/volume controls on the left and the search bar on the right, there’s a panel that normally shows th...
nomenclature
project naming chains of nonsense
elm pine pico nano
trivia
project naming chains of nonsense
elm pine pico nano
retrospective
wanted — a replacement for actionitems.us
In 2011 the dev team I was on went to Pivotal Labs for a few months to bootstrap a rebuild of our company’s site, and learn their style of “extreme programmi...
dock
jiggling the handle of OS X 10.8.5’s dock
About once a week now, I’ll notice that the Dock on my Macbook (running 10.8.5) no longer auto-shows itself when hovering at the bottom of the screen.
Erlang Factory
notes — Erlang Factory 2015
José: What Elixir Is About
CI
only show single branch status in CI status feeds
CCMenu is a neat little menu icon which shows the build status of your projects on Travis CI, CircleCI, or many other automated build services.
Google Chrome
advanced filtering in Chrome’s Network dev tools
Google Chrome has some nice developer tools. The Network tab in there lets you see requests and their headers, responses, initiators, and much more. Being ab...
network
advanced filtering in Chrome’s Network dev tools
Google Chrome has some nice developer tools. The Network tab in there lets you see requests and their headers, responses, initiators, and much more. Being ab...
filters
advanced filtering in Chrome’s Network dev tools
Google Chrome has some nice developer tools. The Network tab in there lets you see requests and their headers, responses, initiators, and much more. Being ab...
spacemacs
getting started with Spacemacs
Are you a vi/vim user who’s been hearing about how wonderful/useful/fast Spacemacs can be? Here is an evolving list of pointers for folks beginning to use th...
emacs
getting started with Spacemacs
Are you a vi/vim user who’s been hearing about how wonderful/useful/fast Spacemacs can be? Here is an evolving list of pointers for folks beginning to use th...
joke
La trahison des mots
Run this in your (POSIX-compliant) shell — I promise it’s not bad:
punctuation
typing an ellipsis in OS X
Ever find yourself wanting to type a literal ellipsis, like this? …
ElixirConf
ElixirConf US 2015 notes
ElixirConf US 2015 was October 2–3 in Austin, Texas.
how to mark an email as “not-spam” in Google’s Inbox
I’m using Google’s Inbox mail client for work email. Recently I noticed that an email in a thread was marked as being spam, and couldn’t find a way to tell I...
brew
installing an old version of something via brew
Don’t need to brew edit or check out old SHAs inside /usr/local/Library any more: just brew switch [project] [version]. Shiny!
static analysis
getting Hound-CI to show Rubocop “cop names” again
Thoughtbot’s Hound-CI service runs Rubocop on Ruby projects. It had a setting to show the name of the “cop” (style rule) that failed, which made it easier to...
future-proofing
linking to code? always use an href which is tied to a specific commit
tl;dr Don’t use links like github.com/owner/repo/blob/master/file.ext#L13 because that branch will change! Use github.com/owner/repo/blob/COMMIT_SHA/file.ext...
documentation
linking to code? always use an href which is tied to a specific commit
tl;dr Don’t use links like github.com/owner/repo/blob/master/file.ext#L13 because that branch will change! Use github.com/owner/repo/blob/COMMIT_SHA/file.ext...
standards
version control commit messages
Here is how I like to structure my Git branches and commit messages.
communication
version control commit messages
Here is how I like to structure my Git branches and commit messages.
NPM
notes for npmCamp 2016
Isaac Schlueter
npmCamp
notes for npmCamp 2016
Isaac Schlueter
iOS
use a Dvorak keyboard layout on iOS Simulator
…why would anyone want to have Dvorak on a mobile device?!? Actually, I only care about it in the iOS Simulator, when I’m using it on a computer with a real-...
merge conflicts
don’t be scared of merge conflicts
First things first: it can be a lot easier to resolve merge conflicts when you can see what the code looked like before the edits which are now conflicting. ...
eslint
eslint — Cannot read property ‘value’ of undefined
Are you seeing ESLint throwing an error like
ecmascript
eslint — Cannot read property ‘value’ of undefined
Are you seeing ESLint throwing an error like
linting
eslint — Cannot read property ‘value’ of undefined
Are you seeing ESLint throwing an error like
HapiJS
hapi — unset a cookie
…because the documentation for Hapi is awful:
SEO
logging meta tags
Sure can be annoying looking through HTML source trying to find all the <meta name="whatever" content="something that search engines love" /> tags that...
charts
counting eggs before they hatch
(…not quite literally, because these wouldn’t hatch anyway. But they are literal eggs…)
chickens
counting eggs before they hatch
(…not quite literally, because these wouldn’t hatch anyway. But they are literal eggs…)
eggs
counting eggs before they hatch
(…not quite literally, because these wouldn’t hatch anyway. But they are literal eggs…)
time series
counting eggs before they hatch
(…not quite literally, because these wouldn’t hatch anyway. But they are literal eggs…)
meta
reviving this blog
This blog is still alive! Up and running on Jekyll now. Should figure out how to support RSS feeds…
almost-dead-net
reviving this blog
This blog is still alive! Up and running on Jekyll now. Should figure out how to support RSS feeds…
advertising
One Weird Trick to Easily Remove (maybe) Anything from a Webpage
If you are using a desktop (not mobile/tablet) Mozilla Firefox or Brave Browser (or Google Chrome or another browser based on Chromium), here’s a quick way t...
browsers
One Weird Trick to Easily Remove (maybe) Anything from a Webpage
If you are using a desktop (not mobile/tablet) Mozilla Firefox or Brave Browser (or Google Chrome or another browser based on Chromium), here’s a quick way t...
dontdo
how to run React on top of Ruby-on-Rails
… don’t do it!
cypress.io
upgrading Cypress to v10 within a Gatsby project
Cypress v10 is out, and it makes some big changes. It comes with a real handy migration guide built into the cypress open command, which is nice! But the com...
gatsby
upgrading Cypress to v10 within a Gatsby project
Cypress v10 is out, and it makes some big changes. It comes with a real handy migration guide built into the cypress open command, which is nice! But the com...
web
upgrading Cypress to v10 within a Gatsby project
Cypress v10 is out, and it makes some big changes. It comes with a real handy migration guide built into the cypress open command, which is nice! But the com...
Bleacher Report
BReport is dead; long live the microlith
We did it — we finally retired BReport!!
SDLC
BReport is dead; long live the microlith
We did it — we finally retired BReport!!
monolith
BReport is dead; long live the microlith
We did it — we finally retired BReport!!
microservices
BReport is dead; long live the microlith
We did it — we finally retired BReport!!
Ruby on Rails
BReport is dead; long live the microlith
We did it — we finally retired BReport!!
diff
resizing tab width on GitHub diffs
Do you think 8-wide tabs are too wide, especially when reviewing code side-by-side?
github
resizing tab width on GitHub diffs
Do you think 8-wide tabs are too wide, especially when reviewing code side-by-side?
browser hack
resizing tab width on GitHub diffs
Do you think 8-wide tabs are too wide, especially when reviewing code side-by-side?
npm
npm ci with legacy-peer-deps is a thing
So you’ve got a JavaScript project in the wild, and real life happens so you’ve been npm installing with the --legacy-peer-deps for a little while now. No ju...
lockfile
npm ci with legacy-peer-deps is a thing
So you’ve got a JavaScript project in the wild, and real life happens so you’ve been npm installing with the --legacy-peer-deps for a little while now. No ju...
mystery
npm ci with legacy-peer-deps is a thing
So you’ve got a JavaScript project in the wild, and real life happens so you’ve been npm installing with the --legacy-peer-deps for a little while now. No ju...
standup
Hot Ones standup
That time we did a Hot Ones-style challenge at work…
from the archives
Hot Ones standup
That time we did a Hot Ones-style challenge at work…
NodeJS
framework-less CLI TDD with NPM* OMG LOL
* no this does not involve npm, it just made the title look good 🤷
tests
framework-less CLI TDD with NPM* OMG LOL
* no this does not involve npm, it just made the title look good 🤷
languages
👈 ⏮️ 🧠 🗣 ⏩ 🗣 👍
👋 👤 ♾️ ➗️ 🗣 ❗️ ⏰ 👇 🔼 ➗️ 👈 ⏮️ 🧠 🗣 ⏩ 🗣 👍 ❗️
emoji
👈 ⏮️ 🧠 🗣 ⏩ 🗣 👍
👋 👤 ♾️ ➗️ 🗣 ❗️ ⏰ 👇 🔼 ➗️ 👈 ⏮️ 🧠 🗣 ⏩ 🗣 👍 ❗️
techdebt
how to consistently pay back dependency tech-debt in an Agile environment
tldr: make a ‘recursive’ ticket which you continually schedule for future sprints… Product will hate it initially, but will love it eventually
software management
how to consistently pay back dependency tech-debt in an Agile environment
tldr: make a ‘recursive’ ticket which you continually schedule for future sprints… Product will hate it initially, but will love it eventually
sitelen sitelen
nasin pi lipu nimi
A thought experiment: how might one use a toki pona reference document which only uses sitelen sitelen?
lojban
Oghamic Lojban
Haven’t you always wanted to write Lojban using Ogham letters? .i’isai — Me too!
cypress
Cypress component testing with Svelte v5 (and SvelteKit)
Version 5 of Svelte makes some dramatic changes in its API. Cypress component testing already doesn’t play nicely with SvelteKit, and Svelte v5 doesn’t make ...
svelte
Cypress component testing with Svelte v5 (and SvelteKit)
Version 5 of Svelte makes some dramatic changes in its API. Cypress component testing already doesn’t play nicely with SvelteKit, and Svelte v5 doesn’t make ...
vitest
mocking in Vitest: how to conditionally modify a mocked imported function’s behavior
(This was not apparent at all despite an hour or two looking through Vitest’s docs…)