rollup.test.config.js

import resolve from '@rollup/plugin-node-resolve'
import commonjs from '@rollup/plugin-commonjs'
import multi from '@rollup/plugin-multi-entry'
import svelte from 'rollup-plugin-svelte'
import sveltePreprocess from 'svelte-preprocess'
import typescript from '@rollup/plugin-typescript'
import css from 'rollup-plugin-css-only'

const preprocessOptions = require('./svelte.config').preprocessOptions
const production = !process.env.ROLLUP_WATCH

export default {
  input: 'spec/**/*.spec.ts',
  output: {
    sourcemap: true,
    format: 'cjs',
    name: 'tests',
    file: 'build/bundle-tests.js'
  },
  plugins: [
    multi(),
    svelte({
      preprocess: sveltePreprocess({
        ...preprocessOptions
      }),
      compilerOptions: {
        dev: !production
      }
    }),
    css({ output: 'bundle.css' }),
    resolve({
      browser: true,
      dedupe: ['svelte']
    }),
    commonjs(),
    typescript({
      sourceMap: !production,
      inlineSources: !production
    })
  ],
  onwarn (warning, warn) {
    if (warning.code === 'UNRESOLVED_IMPORT') return
    warn(warning)
  },
  external: [
    'canvas-prebuilt',
    'canvas',
    'jsdom/lib/jsdom/utils',
    'jsdom/lib/jsdom/living/generated/utils',
    'jsdom',
    'xmldom'
  ]
}