Skinner, Matthew L., 1968- author

Smith, Barry D., 1957 December 4- author

Nienhuis, David R., 1968- author

Sechrest, Love L., 1962- author

Chilton, Bruce

Marcus, Joel, 1951- author

Avalos, Hector, author

Ehrman, Bart D., author

Schaberg, Jane, author

Reeder, Caryn A., author

Wan, Wei Hsien, author

Keddie, G. Anthony, author

Maier, Harry O., 1959- author

Hylen, Susan, author

Brown, Sherri, author

Wright, N. T. (Nicholas Thomas), author

Holland, Tom, author

Sehested, Nancy Hastings, author

Montero, Roman A., author, translator

Most people I know hate and fear wasps. I’ve always been intrigued by them; they are quite beautiful looking insects – social insects – that have an important role in ecosystems. Their nests are incredible and I found and photographed a large nest constructed this year in our roof cavity.

This nest is about the diameter of a football (soccer ball) and gives you an idea of the intricate structure of a wasp nest made up of thousands of thin fans of paper-like material.

Unlike honey bees, wasps do not have wax-producing glands and those that make these kinds of nests construct them from a substance derived from wood pulp. They usually chew on dead or weathered wood and you can sometimes find wasps stripping thin layers from man-made wooden objects like park benches, panelling on houses, or exposed window frames. Wasps mix this wood with saliva to produce a paper-like material that is used to construct their nest.

You can see how each fanned layer of paper is made up of bands of different colour. This is presumably because the layers been progressively built up by wasps returning with wood pulp sourced from different types and colours of wood.

The final effect is really beautiful and it’s impressive to think that this kind of large organised structure, which houses the queen’s larvae in combs and regulates temperature, is the result of thousands of individual wasps working together. It is only used for one season before being abandoned as the winter approaches and the majority of the colony dies from cold.

I’m working on a project at Twitter that uses React and webpack. After a few conversations with @sokra last year, this is the setup I put in place for testing React components (authored using JSX and ES6) using Karma.

Dependencies

You’ll need to install various packages. It looks like a lot of dependencies, but all the non-Karma packages will be necessary for general module bundling during development.

Full set of required packages:

• babel-core: to transform JSX and transpile ES6.
• babel-loader: webpack loader for Babel.
• karma: the test runner.
• karma-chai-plugins: assertion library (or your library of choice).
• karma-chrome-launcher: Chrome browser launcher.
• karma-cli: CLI tool for Karma.
• karma-mocha: adapter for the Mocha testing framework.
• karma-sourcemap-loader: sourcemap loader.
• karma-webpack: to use webpack with Karma.
• react
• webpack: module bundler

webpack entry file

If you use webpack-specific features in your modules (e.g., loaders, plugins) you will need to use webpack to build a test bundle. The fastest and simplest approach is to create a single, test-specific entry file.

Create a file named tests.bundle.js. Within this file, you create a webpack context to match all the files that conform to a naming pattern – in this case *.spec.js(x).

var context = require.context('.', true, /.+.spec.jsx?$/);
context.keys().forEach(context);
module.exports = context;

Next, you point Karma to this file.

Karma config

Karma is configured using a karma.conf.js file. The browsers, plugins, and frameworks are specified in the standard way.

Point Karma at the tests.bundle.js file, and run it through the relevant preprocessor plugins (see example below).

The karma-webpack plugin relies on 2 custom properties of the Karma config: webpack and webpackMiddleware. The value of the former must be a webpack config object.

module.exports = function (config) {
  config.set({
    browsers: [ 'Chrome' ],
    // karma only needs to know about the test bundle
    files: [
      'tests.bundle.js'
    ],
    frameworks: [ 'chai', 'mocha' ],
    plugins: [
      'karma-chrome-launcher',
      'karma-chai',
      'karma-mocha',
      'karma-sourcemap-loader',
      'karma-webpack',
    ],
    // run the bundle through the webpack and sourcemap plugins
    preprocessors: {
      'tests.bundle.js': [ 'webpack', 'sourcemap' ]
    },
    reporters: [ 'dots' ],
    singleRun: true,
    // webpack config object
    webpack: {
      devtool: 'inline-source-map',
      module: {
        loaders: [
          {
            exclude: /node_modules/,
            loader: 'babel-loader,
            test: /.jsx?$/
          }
        ],
      }
    },
    webpackMiddleware: {
      noInfo: true,
    }
  });
};

Rather than duplicating your webpack config, you can require it in the Karma config file and override the devtool value to get sourcemaps working.

var webpackConfig = require('./webpack.config');
webpackConfig.devtool = 'inline-source-map';

module.exports = function (config) {
  config.set({
    ...
    webpack: webpackConfig
  });
};

That’s all you need to do to configure Karma to use webpack to load your JSX, ES6 React components.

43 cases from Ganjam district; State’s total mounts to 271

TrueNat machines will be used for the first time in the State for virus screening

Court says Hemant Bhatt needs to be treated at a govt. hospital

The Centre said it feared that the order may have a “cascading effect” on migrants of other States as well

Bandipora tops the list with 134 cases, followed by Srinagar at 129

He is wanted for murder, attempt to murder and smuggling of weapons and drugs

Greene, Jeffrey R., author

Hampel, Brenda

Nelson-Smith, Stephen

Albrecht-Zölch, Janet, author