feat(tests): add minimal integration tests

.eslintrc.js

@@ -1,5 +1,8 @@
 module.exports = {
   "extends": "airbnb-base",
+  "env": {
+    "jest": true
+  },
   "rules": {
     "no-console": 0
   },

package.json

@@ -67,7 +67,7 @@
     "eslint": "^3.19.0",
     "eslint-config-airbnb-base": "^11.2.0",
     "eslint-plugin-import": "^2.3.0",
-    "jest": "^20.0.3",
+    "jest": "^21.1.0",
     "rimraf": "^2.6.1",
     "uglify-js": "^3.0.8",
     "watch": "^1.0.2"
@@ -82,9 +82,12 @@
     "build": "yarn run build:js",
     "build:js": "cp -R src/ dist",
     "build:watch": "watch 'yarn run build' src",
-    "test": "echo add tests",
+    "test": "jest",
     "docs": "echo add docs",
     "lint": "eslint src",
     "dist": "echo add dist"
+  },
+  "jest": {
+    "testEnvironment": "node"
   }
 }

tests/__tests__/report_files.test.js

@@ -0,0 +1,45 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const tmp = require('tmp');
+
+const ace = require('../../src/core/ace.js');
+
+let outdir;
+let tmpdir;
+
+tmp.setGracefulCleanup();
+
+beforeEach(() => {
+  outdir = tmp.dirSync({ prefix: 'ace_out_', unsafeCleanup: true });
+  tmpdir = tmp.dirSync({ prefix: 'ace_tmp_', unsafeCleanup: true });
+});
+
+afterEach(() => {
+  outdir.removeCallback();
+  tmpdir.removeCallback();
+});
+
+function runAce(epub) {
+  return ace(epub, {
+    cwd: process.cwd(),
+    outdir: outdir.name,
+    tmpdir: tmpdir.name,
+    verbose: true,
+    silent: true,
+  });
+}
+
+test('unexisting EPUB fails with an error', () => {
+  expect.assertions(1);
+  return expect(runAce('noepub'))
+    .rejects.toMatch('');
+});
+
+test('report dir is correctly created', async () => {
+  expect.assertions(1);
+  return runAce(path.join(__dirname, '../data/base-epub-30.epub')).then(() => {
+    expect(fs.existsSync(path.join(outdir.name, 'report.html'))).toBeTruthy();
+  });
+});