I followed the instructions to install Facebook jest on https://facebook.github.io/jest/docs/getting-started.html#content :
npm install --save-dev jest-cli
After the install command I typed jest in the terminal, and press enter but It popped:
bash: jest: command not found.
But when I run the getting started sample by using npm test in the terminal, it worked well.
So, how can I verify that Facebook jest is installed successfully?
Ways to install a package in npm
In node.js you have two ways to install a package: globally or locally.
The sintax is the following:
// globally
npm install -g [package_name]
// locally
npm install --save-dev [package_name]
So, now what it happens is that you run the local one which downloads the package in node_modules under your project folder.
To check you installed jest properly so you can check on your node_modules if there is a jest folder.
How to check if jest is installed
In addition to that npm is creating a shortcut in you local node_modules under the directory .bin son in there you should find a link to jest.
You can test that like that:
cd your_project_folder
./node_modules/.bin/jest
Why npm test works?
The reason why npm test works is because when you run it npm is going to look for the commands globally and locally.
Related
I am trying to follow this MS tutorial.
So I install the CLI from the VS code terminal: npm install #azure/static-web-apps-cli
Works.
But following the instructions using "swa init" in the terminal I get this response:
swa : The term 'swa' is not recognized.... etc.
Adding the command to package.json as a script will work, but how do I run it directly from the terminal without adding it to package.json?
npx swa init would pull the swa package and execute it as if it was run from within package.json. You can read more about it on npmjs.com/package/npx
Alternatively, you could have the swa package installed globally with npm i -g #azure/static-web-apps-cli
I'm trying to set up a build environment to explore react.
My build process uses gulp.
I installed packages like this:
npm install --save-dev gulp-babel#7 babel-core babel-preset-env
After discovering that I needed to install something related to babel and react I also ran:
npm install --save-dev #babel/preset-react
My .babelrc has this:
{ "presets": ["#babel/preset-react"] }
My gulpfile has this:
gulp.task('scripts', function() {
return gulp.src(['./src/js/main.js' ])
.pipe(babel({
presets : ['#babel/preset/react']
}))
.pipe(concat('test.js'))
.pipe(gulp.dest('./js'))
.pipe(uglify())
.pipe(rename('test.min.js'))
.pipe(gulp.dest('./js')) ;
});
When I run 'gulp scripts' I get this:
[22:51:14] Using gulpfile ~/play/learning-react-2/gulpfile.js
[22:51:14] Starting 'scripts'...
[22:51:14] 'scripts' errored after 59 ms
[22:51:14] Error in plugin "gulp-babel"
Message:
Cannot find module '#babel/core' (While processing preset: "/home/bob/play/learning-react-2/node_modules/#babel/preset-react/lib/index.js")
I deleted babel-core from node_modules, and reinstalled it using the command:
npm install --save-dev #babel/core
If I look at the contents of node_modules, I see these packages related to babel:
babel-code-frame/
babel-helper-builder-binary-assignment-operator-visitor/
babel-helper-call-delegate/
babel-helper-define-map/
babel-helper-explode-assignable-expression/
babel-helper-function-name/
babel-helper-get-function-arity/
babel-helper-hoist-variables/
babel-helper-optimise-call-expression/
babel-helper-regex/
babel-helper-remap-async-to-generator/
babel-helper-replace-supers/
babel-messages/
babel-plugin-check-es2015-constants/
babel-plugin-syntax-async-functions/
babel-plugin-syntax-exponentiation-operator/
babel-plugin-syntax-trailing-function-commas/
babel-plugin-transform-async-to-generator/
babel-plugin-transform-es2015-arrow-functions/
babel-plugin-transform-es2015-block-scoped-functions/
babel-plugin-transform-es2015-block-scoping/
babel-plugin-transform-es2015-classes/
babel-plugin-transform-es2015-computed-properties/
babel-plugin-transform-es2015-destructuring/
babel-plugin-transform-es2015-duplicate-keys/
babel-plugin-transform-es2015-for-of/
babel-plugin-transform-es2015-function-name/
babel-plugin-transform-es2015-literals/
babel-plugin-transform-es2015-modules-amd/
babel-plugin-transform-es2015-modules-commonjs/
babel-plugin-transform-es2015-modules-systemjs/
babel-plugin-transform-es2015-modules-umd/
babel-plugin-transform-es2015-object-super/
babel-plugin-transform-es2015-parameters/
babel-plugin-transform-es2015-shorthand-properties/
babel-plugin-transform-es2015-spread/
babel-plugin-transform-es2015-sticky-regex/
babel-plugin-transform-es2015-template-literals/
babel-plugin-transform-es2015-typeof-symbol/
babel-plugin-transform-es2015-unicode-regex/
babel-plugin-transform-exponentiation-operator/
babel-plugin-transform-regenerator/
babel-plugin-transform-strict-mode/
babel-preset-env/
babel-runtime/
babel-template/
babel-traverse/
babel-types/
I'm guessing that at least one of them is "babel core"
So... how do I actually run babel from gulp? How do I run it at all?
I had the same issue. I resolved it by removing node_modules and I reinstalled packages (with yarn OR npm install). The problem was fixed.
In case Victor's answer doesn't help, it may be worth a try to clean your machine's package cache by running npm cache clean/yarn cache clean or removing the cache folder manually.
I have installed the module with node version v0.10.22
sudo npm install -g ionic
But know when I am trying to start an new application I am getting a
-bash command not found
which ionic
gives me nothing, do I have to add the path to on the $PATH variable ?
How did you installed npm? If you used homebrew then npm won't put npm files accessible by users.
Add export PATH=/usr/local/share/npm/bin:$PATH to your .bashrc/.bash_profile/.zshrc file and it should work fine.
Also refer this: Bower: "command not found" after installation
I cloned the protractor code from github (https://github.com/angular/protractor)
Is there a way to run the code from the source code? The documentation is always mentions to install protractor with "npm install", but I want to run the latest code.
Is there an easy way to do this ?
npm install in this context is meant to install the local dependencies for protractor.
You need to just run the protractor script in the bin folder.
git clone https://github.com/angular/protractor.git
cd protractor
npm install
cd bin/
./protractor /path/to/e2e/e2e-conf.js
I have an npm package that uses coffeescript source, which I want to precompile before pack or publish. However, my prepublish script depends on coffee-script as a devDependency, but npm isn't installing it before running the prepublish action. I have to run npm install separately first, which seems wrong. The same issue exists if I try to npm install the source folder into a different project.
I suspect that I'm "doing it wrong," but the only other guidence I've seen is to compile on install rather than publish. I'd rather not do that, so I'm hoping there are examples of prepublish compilation that I can crib from.