add --progress cli test

test/cli.test.js

@@ -3,6 +3,8 @@
 const assert = require('assert');
 const path = require('path');
 const execa = require('execa');
+const runDevServer = require('./helpers/run-webpack-dev-server');
+
 
 describe('SIGINT', () => {
   it('should exit the process when SIGINT is detected', (done) => {
@@ -26,3 +28,15 @@ describe('SIGINT', () => {
     });
   }).timeout(4000);
 });
+
+describe('CLI', () => {
+  it('--progress', (done) => {
+    runDevServer('--progress')
+      .then((output) => {
+        assert(output.code === 0);
+        assert(output.stderr.indexOf('0% compiling') >= 0);
+        done();
+      })
+      .catch(done);
+  }).timeout(4000);
+});

test/fixtures/cli/foo.js

@@ -0,0 +1,3 @@
+'use strict';
+
+console.log('i am foo!');

test/fixtures/cli/webpack.config.js

@@ -0,0 +1,20 @@
+'use strict';
+
+module.exports = {
+  context: __dirname,
+  entry: './foo.js',
+  output: {
+    filename: 'bundle.js'
+  },
+  plugins: [{
+    apply(compiler) {
+      compiler.plugin('done', (stats) => {
+        let exitCode = 0;
+        if (stats.hasErrors()) {
+          exitCode = 1;
+        }
+        setTimeout(() => process.exit(exitCode));
+      });
+    }
+  }]
+};

test/helpers/run-webpack-dev-server.js

@@ -0,0 +1,50 @@
+'use strict';
+
+const path = require('path');
+const spawn = require('child_process').spawn;
+
+const webpackDevServerPath = path.resolve(__dirname, '../../bin/webpack-dev-server.js');
+const basicConfigPath = path.resolve(__dirname, '../fixtures/cli/webpack.config.js');
+
+
+function runWebackDevServer(testArgs, configPath) {
+  const cwd = process.cwd();
+  const env = process.env.NODE_ENV;
+  let stdout = '';
+  let stderr = '';
+
+  if (!configPath) {
+    configPath = basicConfigPath;
+  }
+
+  if (!testArgs) {
+    testArgs = [];
+  } else if (typeof testArgs === 'string') {
+    testArgs = testArgs.split(' ');
+  }
+
+  const args = [webpackDevServerPath, '--config', configPath].concat(testArgs);
+
+  return new Promise((resolve, reject) => {
+    const child = spawn('node', args, { cwd, env });
+
+    child.on('error', error => reject(error));
+
+    child.stdout.on('data', (data) => {
+      stdout += data.toString();
+    });
+
+    child.stderr.on('data', (data) => {
+      stderr += data.toString();
+    });
+
+    child.on('close', (code) => {
+      if (code !== 0) {
+        return reject(stderr);
+      }
+      resolve({ stdout, stderr, code });
+    });
+  });
+}
+
+module.exports = runWebackDevServer;