add integration testing support

rollup.test-integration-config.js

@@ -0,0 +1,34 @@
+"use strict";
+
+import clear from "rollup-plugin-clear";
+import resolve from "rollup-plugin-node-resolve";
+import commonjs from "rollup-plugin-commonjs";
+import typescript from "rollup-plugin-typescript2";
+import buble      from 'rollup-plugin-buble';
+import multiEntry from 'rollup-plugin-multi-entry';
+import nodent from 'rollup-plugin-nodent';
+
+export default {
+  input: 'test/integration/**/*.test.ts',
+  output: {
+    file: 'dist/test-integration.bundle.js',
+    name: 'lib',
+    sourcemap: true,
+    format: 'iife',
+    globals: {
+      chai: 'chai',
+      it: 'it',
+      describe: 'describe'
+    }
+  },
+  external: ['chai', 'it', 'describe'],
+  plugins: [
+    clear({ targets: ["dist/test.bundle.js"] }),
+    resolve(),
+    commonjs(),
+    typescript({tsconfig: "./tsconfig.test-integration.json"}),
+    nodent(),
+    multiEntry(),
+    buble()
+  ]
+}