karma-typescript attempts to process node_modules TS by default config

[schoettler]

Seems like something might be wrong with my karma.conf? Would anyone be available here to help?

This is my config:

const plugins = [
  require('karma-webpack'),
  require('karma-jasmine'),
  require('karma-typescript'),
  require('karma-chrome-launcher'),
  require('karma-jasmine-html-reporter'),
  require('karma-coverage'),
  require('karma-coverage-istanbul-reporter'),
  require('karma-sinon'),
  require('@angular-devkit/build-angular/plugins/karma'),
]

module.exports = function (config) {
  config.set({
    angularCli: {
      environment: 'dev'
    },
    files: [
      './src/main.ts',
      { pattern: './src/**/*spec.ts', watched: false }
    ],
    exclude: ['node_modules'],
    preprocessors: {
      './src/**/*.ts': ['karma-typescript'],
      './src/**/*spec.ts': ['webpack']
    },
    frameworks: [
      'webpack',
      'jasmine',
      'karma-typescript',
      'sinon',
      '@angular-devkit/build-angular',
    ],
    plugins,
    client: {
      clearContext: true,
      jasmine: {
        random: true,
      },
    },
    // karmaTypescriptConfig,
    port: 9876,
    colors: true,
    browserNoActivityTimeout: 30000,
    logLevel: config.LOG_INFO,
    webpack: {
      resolve: {
        enforceExtension: false,
        extensions: ['.ts', '...'],
      },
    }
  })
}