Merge pull request #6 from Polymer/gen-tests

Add integration tests for some representative Polymer libraries.

.gitignore

@@ -1,2 +1,3 @@
 node_modules
-lib/
+lib
+src/test/fixtures

package.json

@@ -19,9 +19,11 @@
   "devDependencies": {
     "@types/chai": "^4.0.4",
     "@types/mocha": "^2.2.43",
+    "bower": "^1.8.2",
     "chai": "^4.1.2",
     "clang-format": "^1.0.55",
     "mocha": "^3.5.3",
+    "rimraf": "^2.6.2",
     "source-map-support": "^0.5.0",
     "typescript": "^2.5.3",
     "watchy": "^0.7.0"
@@ -31,8 +33,11 @@
     "format": "find src -name '*.ts' | xargs clang-format --style=file -i",
     "build": "npm run clean && tsc",
     "build:watch": "tsc --watch",
-    "test": "npm run build && mocha",
-    "test:watch": "watchy -w src -- npm run test"
+    "test": "npm run test:setup-once && npm run build && mocha",
+    "test:watch": "watchy -w src -- npm run test",
+    "test:setup": "scripts/setup-fixtures.sh",
+    "test:setup-once": "mkdir src/test/fixtures && npm run test:setup || true",
+    "test:make-goldens": "scripts/make-goldens.js"
   },
   "repository": {
     "type": "git",

scripts/fixtures.txt

@@ -0,0 +1,3 @@
+https://github.com/PolymerElements/paper-button.git v2.0.0 paper-button
+https://github.com/PolymerElements/paper-behaviors.git v2.0.1 paper-behaviors
+https://github.com/Polymer/polymer.git v2.1.1 polymer

scripts/make-goldens.js

@@ -0,0 +1,39 @@
+#!/usr/bin/env node
+
+/**
+ * @license
+ * Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at
+ * http://polymer.github.io/LICENSE.txt The complete set of authors may be found
+ * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may
+ * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by
+ * Google as part of the polymer project is also subject to an additional IP
+ * rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+/**
+ * This script should be run from `npm run test:make-goldens`. It runs the
+ * TypeScript declarations generator across all repos in the
+ * `test/src/fixtures` directory, and writes the output to
+ * `test/src/goldens/<fixture>/expected.d.ts`. The results of this script
+ * *should* be checked in.
+ */
+
+const fs = require('fs');
+const path = require('path');
+const rimraf = require('rimraf');
+const {generateDeclarations} = require('../lib/gen-ts');
+
+const fixturesDir = path.join(__dirname, '..', 'src', 'test', 'fixtures');
+const goldensDir = path.join(__dirname, '..', 'src', 'test', 'goldens');
+
+rimraf.sync(goldensDir);
+fs.mkdirSync(goldensDir);
+
+for (const dir of fs.readdirSync(fixturesDir)) {
+  generateDeclarations(path.join(fixturesDir, dir)).then((declarations) => {
+    const outDir = path.join(goldensDir, dir);
+    fs.mkdirSync(outDir);
+    fs.writeFileSync(path.join(outDir, 'expected.d.ts'), declarations);
+  });
+}

scripts/setup-fixtures.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+# This code may only be used under the BSD style license found at
+# http://polymer.github.io/LICENSE.txt The complete set of authors may be found
+# at http://polymer.github.io/AUTHORS.txt The complete set of contributors may
+# be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by
+# Google as part of the polymer project is also subject to an additional IP
+# rights grant found at http://polymer.github.io/PATENTS.txt
+
+# This script should be run from `npm run test:setup`. It reads a list of repos
+# from `fixtures.txt`, clones them into the `src/test/fixtures` directory, and
+# installs them for testing.
+#
+# To add a new repo for testing, add it to `fixtures.txt`, run `npm run
+# test:setup && npm run test:make-goldens`.
+
+set -e
+
+cd src/test
+rm -rf fixtures
+mkdir fixtures
+cd fixtures
+
+while read -r repo tag dir; do
+  git clone $repo --branch $tag --single-branch --depth 1 $dir
+  cd $dir
+  bower install
+  cd -
+done < ../../../scripts/fixtures.txt

src/test/gen-ts_test.ts

@@ -0,0 +1,31 @@
+/**
+ * @license
+ * Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at
+ * http://polymer.github.io/LICENSE.txt The complete set of authors may be found
+ * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may
+ * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by
+ * Google as part of the polymer project is also subject to an additional IP
+ * rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+import {assert} from 'chai';
+import * as fs from 'fs';
+import * as path from 'path';
+
+import {generateDeclarations} from '../gen-ts';
+
+const fixtures = path.join(__dirname, '..', '..', 'src', 'test', 'fixtures');
+const goldens = path.join(__dirname, '..', '..', 'src', 'test', 'goldens');
+
+suite('generateDeclarations', () => {
+  for (const fixture of fs.readdirSync(goldens)) {
+    test(fixture, async () => {
+      const golden =
+          fs.readFileSync(path.join(goldens, fixture, 'expected.d.ts'));
+      const declarations =
+          await generateDeclarations(path.join(fixtures, fixture));
+      assert.equal(declarations, golden.toString());
+    }).timeout(30000);  // These tests can take a long time.
+  }
+});

src/test/goldens/paper-behaviors/expected.d.ts

@@ -0,0 +1,4 @@
+declare namespace Polymer {
+  type Constructor<T> = new(...args: any[]) => T;
+
+}

src/test/goldens/paper-button/expected.d.ts

@@ -0,0 +1,4 @@
+declare namespace Polymer {
+  type Constructor<T> = new(...args: any[]) => T;
+
+}