You can't put the redirection in mocha. However the mocha. You can put this in your mocha. If there were an option to tell Mocha to output into a specific file for instance, --output file then you could put that in mocha.
Learn more. Declaring output file in mocha.
Mocha Test Explorer for Visual Studio Code
Asked 6 years ago. Active 6 years ago. Viewed 2k times. What am I missing? Luis Martins Luis Martins 1, 2 2 gold badges 15 15 silver badges 27 27 bronze badges. You're mistaking shell redirection the ability to write a command's output to a file with a mocha feature. It would be nice, however, to add that feature! You could add an issue asking for that in the GitHub repoand even try to implement it yourself. Active Oldest Votes. Louis Louis k 25 25 gold badges silver badges bronze badges.
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Related 8. Hot Network Questions. Question feed.Not long ago I wrote a post on how to setup testing using Mocha, Chai, Karma, Webpack, Sinon and TypeScript and although this is something I still use today, using karma and Webpack might be an overkill scenario. Why overkill you might ask? Well, if all you're doing is writing some TypeScript and bundling it, you don't need Webpack to load your modules, Node can do it. And you probably don't need to load a browser, you might be writing code that is independent of the browser, or in your tests you might be using something such as jsdom.
The configuration is straightforward, but it might take some time to find that, so that's why I'm writing this post. First, to load tests written in TypeScript, we need to install ts-node. In those scripts, the important part is that I'm telling mocha to look for its options in a mocha. Next, I'm setting up mocha to watch for tsx and ts extension files, so that when those change it will rerun the tests.
By default, it watches only js files. Finally, by default mocha looks for tests in a test folder and only for. I'm telling mocha to look for. PS: As of Node. JS 6, Node's support for ES6 features has increased a lot. That means that when writing TypeScript code, we can set the compiler to target ES6 safely.This recipe shows how to use the built-in Node Debugger to debug Mocha tests.
Click on the Debugging icon in the Activity Bar to bring up the Debug view. Then click on the gear icon to configure a launch. If you don't have all of your tests under a common "test" directory, then the following configurations can be used.
If you are running mocha will multiple arguments, you may consider creating an opt file that store all these arguments i. Go to the Debug view, select the 'Mocha All' configuration, then press F5 or click the green play button. Go to the Debug view, select the 'Mocha Current File' configuration, then press F5 or click the green play button.
测试框架 Mocha 实例教程
Skip to content. Branch: master. Create new file Find file History. Latest commit. Latest commit bbcd Oct 31, To try the example you'll need to install dependencies by running: npm install Configure launch. You signed in with another tab or window. Reload to refresh your session.
You signed out in another tab or window. Add mocha test configuration that takes in option file. Oct 13, Jan 2, Add mocha test options file. Spelling errors fixed. Oct 31, Add instruction on using opts for mocha test.If you use a transpiler for your test sources, there are 2 ways to make the tests work in Mocha Test Explorer:.
Example for Typescript:. Documentation for writing launcher scripts can be found in the vscode-test-adapter-remoting-util package, which also contains utility functions for writing your launcher script. There are also example projects containing well-documented launcher scripts for running your tests in a docker container or on another machine via ssh.
Alternatively, you can use VS Code Remote Development to move your workspace to the remote environment. If you do so, your tests will also be run in this environment automatically. This is easier to set up because you don't need to write a launcher scriptbut requires that your entire workspace and large parts of VS Code run in the remote environment, which depending on the environment may be impractical or even impossible.
You can put any command line options into a mocha configuration file or the legacy mocha. For mocha. If you want to customize the configuration used for debugging your tests e. Here's the default debugging configuration used by this adapter:. The following commands are available in VS Code's command palette, use the ID to add them to your keyboard shortcuts:. If the Test view doesn't show your tests or anything else doesn't work as expected, you can turn on diagnostic logging using one of the following configuration options note: in multi-root workspaces, these options are always taken from the first workspace folder :.
There is a bug in Node If you're using a version of Node affected by this bug, add "mochaExplorer. If you think you've found a bug, please file a bug report and attach the diagnostic logs. Sign in. Get it now.
Mocha Test Explorer Holger Benl. Copied to clipboard. Features Shows a Test Explorer in the Test view in VS Code's sidebar with all detected tests and suites and their state Adds CodeLenses to your test files for starting and debugging tests Adds Gutter decorations to your test files showing the tests' state Adds line decorations to the source line where a test failed Shows a failed test's log when the test is selected in the explorer Lets you choose test suites or individual tests in the explorer that should be run automatically after each file change Getting started Install the extension and restart VS Code Put your Mocha command line options if you have any in a mocha configuration file either a.
If you use a transpiler for your test sources, there are 2 ways to make the tests work in Mocha Test Explorer: running the original non-transpiled sources directly by transpiling them on-the-fly using ts-node for Typescript, babel-register for Babel, etc. Example for Typescript: "mochaExplorer. Configuration Mocha command line options You can put any command line options into a mocha configuration file or the legacy mocha. Alternatively, you can put supported options into VS Code's settings: Property Corresponding command line option mochaExplorer.
Hosted on GitHub. Find Mocha helpful? Become a backer and support Mocha with a monthly donation. Use Mocha at Work? Ask your manager or marketing team if they'd help support our project. Your company's logo will also be displayed on npmjs. A brief outline on the order Mocha's components are executed.
Worth noting that all hooks, describe and it callbacks are run in the order they are defined i. If you use callback-based async tests, Mocha will throw an error if done is called multiple times.
This is handy for catching accidental double callbacks. Mocha allows you to use any assertion library you wish.
In the above example, we're using Node. This means you can use libraries such as:. Testing asynchronous code with Mocha could not be simpler! Simply invoke the callback when your test is complete. By adding a callback usually named done to itMocha will know that it should wait for this function to be called to complete the test. This callback accepts both an Error instance or subclass thereof or a falsy value; anything else is invalid usage and throws an error usually causing a failed test.
Alternatively, just use the done callback directly which will handle an error argument, if it exists :. Alternately, instead of using the done callback, you may return a Promise.
Mocha allows you to use any assertion library you want, if it throws an error, it will work! This means you can utilize libraries such as should. When testing synchronous code, omit the callback and Mocha will automatically continue on to the next test. Testing asynchronous code with Mocha could not be simpler! Simply invoke the callback when your test is complete. By adding a callback usually named done to it Mocha will know that it should wait for completion.
To make things even easier, the done callback accepts an error, so we may use this directly:. For example you may wish to populate database with dummy content before each test:. Alternately, instead of using the done callback, you can return a promise. This is useful if the APIs you are testing return promises instead of taking callbacks:.
The latter example uses Chai as Promised for fluent promise assertions. This is because Mocha has a root Suite with no name. Mocha provides the hooks beforeafterbeforeEachafterEachthat can be used to set up preconditions and clean up your tests. All hooks can be invoked with an optional description, making it easier to pinpoint errors in your tests. If hooks are given named functions those names will be used if no description is supplied.
The exclusivity feature allows you to run only the specified suite or test-case by appending. Note that currently only one. This feature is similar to.
A quick and complete guide to Mocha testing
For example --compilers coffee:coffee-script with CoffeeScript 1. Accepts a comma-delimited list of accepted global variable names.
For example, suppose your app deliberately exposes a global named app and YUIyou may want to add --globals app,YUI. It also accepts wildcards. By default Mocha will not check for global variables leaked while running tests, to enable this pass --check-leaksto specify globals that are acceptable use --globalsfor example --globals jQuery,MyLib.
The --require option is useful for libraries such as should.Testing with webpack and Mocha
Note that this works well for should as it augments Object. Furthermore, it can be used with relative paths, e. This flag may also be used to utilize third-party reporters. For example if you npm install mocha-lcov-reporter you may then do --reporter mocha-lcov-reporter.
Specifies the test-case timeout, defaulting to 2 seconds.Mocha is a powerful testing framework for Node. It gives you dozens of helpful utilities to create a convenient testing setup.
Mocha also provides an interceptable testing lifecycle. If you need to run setup and teardown tasks for your test suite, make sure to read on! Creating a solid test suite for your application may require one or more setup steps before running the tests.
A global setup hook may run before any of your tests. The global hook requires one or more setup files. If you need setup steps that rely on each other, you can tell Mocha to import them sequentially and process in the expected order. Imagine that you need to ensure existing database tables. The following example uses Elasticsearch indices and uses a global hook to ensure existing indices when running the tests. To create missing indices in a global setup, you need to create a before function in one of your setup files.
This example uses the test-setup-elastic. Mocha will pick up and process this before function when running the test suite. You can also use beforeEachafteror afterEach here. The next step is to tell Mocha where to find the file. Use the --file argument when calling Mocha via NPM scripts or use a mocha.
A mocha. Each --file argument references a single file.
Add more references when needed and Mocha will process them in the defined order. For individual setups that should run before any test in a selected file, you can use the root-level pre-hooks.
These root-level hooks live outside your describe method. Mocha notices the methods outside the describe block and processes them when running the tests in this file.
Related to a global setup, Mocha provides the same approach for teardowns. Like the testing setup, you have two options for the teardown:. A root-level hook is part of a single test file and lives outside the first describe block:. Remember that Mocha processes all referenced --file imports in the defined order.
Ensure the correct execution plan if you have more than one teardown steps. Mocha offers two options to reference the setup and teardown files. You can add them as arguments in your NPM scripts or in your mocha. We recommend using the mocha. The npm test command may become long when adding more flags. Get your weekly push notification about new and trending Future Studio content and recent platform enhancements.
Marcus is a fullstack JS developer. Testing Setup Before Starting Your Test Suite Creating a solid test suite for your application may require one or more setup steps before running the tests.