freelanceshack.com
-
6 min readTo get Mocha to execute unit tests in multiple subfolders in Node.js, you can use the --recursive flag when running Mocha from the command line. This flag tells Mocha to look for test files in subfolders as well.Alternatively, you can use a wildcard in your Mocha command to specify the folders where your test files are located. For example, you can run mocha 'tests/**/*.js' to tell Mocha to look for test files in all subfolders under the 'tests' directory.
-
7 min readTo create re-usable mocks in Mocha, you can use the sinon library which provides powerful mocking and stubbing features. You can create a mock object using sinon.mock() and then define the expected behavior using expect(). Once you have defined your mock object, you can use it in multiple tests by calling mock.verify() to ensure that the expected behavior was called.Another approach is to use sinon.stub() to create a re-usable stub that simulates the behavior of a function or method.
-
7 min readTo add the recursive option to Mocha programmatically, you can specify it in the Mocha configuration object when creating the Mocha instance programmatically. The recursive option allows Mocha to include subdirectories when running tests. You can set the recursive option to true in the configuration object like this: const mocha = new Mocha({ recursive: true }); By setting the recursive option to true, Mocha will search for test files in all subdirectories of the test directory.
-
5 min readTo pass arguments/parameters to mocha tests invoked via grunt, you can use the -- syntax followed by the arguments you want to pass. For example, if you have a grunt task that runs mocha tests and you want to pass a specific parameter to the tests, you can do so by adding -- followed by the parameter when running your grunt task. This will pass the parameter to the mocha tests and allow you to customize the test execution based on the arguments provided.
-
6 min readTo ignore nested node modules when running Mocha, you can use the --recursive flag in your Mocha command. This flag will tell Mocha to only look for test files in the specified directory and not go into nested node modules. By doing so, you can prevent Mocha from running tests in modules that are not relevant to your current project. This can help speed up the testing process and ensure that only the necessary tests are executed.
-
3 min readMocha allows you to use the "require" function in Node.js to import modules for testing. When you run your test suite with Mocha, it will automatically load any imported modules that you specify in your test files. Mocha also supports ES6 import and export syntax, so you can use the "import" keyword to import modules as well.
-
3 min readIn Mocha, a popular testing framework for Node.js and JavaScript, global variables can be defined outside of the "describe" block by simply declaring the variable at the top level of the test file. This allows the variable to be accessed and used across multiple test suites or within different "describe" blocks.By declaring the global variable at the top level of the test file, it becomes accessible to all test cases within that file, regardless of where they are defined.
-
4 min readTo configure mocha to find all test files recursively, you can use the --recursive flag when running mocha from the command line. This flag tells mocha to search for test files in all subdirectories of the specified directory. Alternatively, you can specify the directories to search for test files using the --include flag followed by a glob pattern that matches the test files you want to run. This allows you to customize which directories mocha should search for test files.
-
5 min readTo test a private function using Mocha, you can either access the private function directly or use a testing framework like Sinon to stub or spy on the private function. When accessing the private function directly, you can use a module bundler like Webpack to expose the private function in your test file. Alternatively, you can use Sinon to stub or spy on the private function without directly accessing it.
-
8 min readTo check whether an image exists using chai or mocha, you would need to use a combination of libraries such as chai-http and fs (File System) to make HTTP requests and check file existence.First, you can use chai-http to make a GET request to the URL of the image you want to check. After receiving the response, you can then check the status code to determine if the image exists or not (e.g., a status code of 200 means the image exists).
-
6 min readTo test code with jQuery promises in Mocha, you can use the chai-as-promised plugin, which extends Chai with a fluent API for testing promises. This plugin allows you to make assertions on promises as if they were synchronous.First, install chai-as-promised using npm: npm install chai-as-promised Then, require both Chai and chai-as-promised in your test file: var chai = require('chai'); var chaiAsPromised = require('chai-as-promised'); chai.