Basic unit testing

Author: fredemmott

.travis.sh

@@ -6,5 +6,5 @@ composer install --ignore-platform-reqs
 
 hh_client
 
-#hhvm vendor/bin/phpunit
+hhvm vendor/bin/hacktest tests/
 hhvm vendor/bin/hhast-lint

composer.json

@@ -1,10 +1,17 @@
 {
     "name": "facebook/difflib",
     "license": "MIT",
+    "extra": {
+      "branch-alias": {
+        "dev-master": "0.2.x-dev"
+      }
+    },
     "require": {
         "hhvm/hsl": "^3.28"
     },
     "require-dev": {
-        "hhvm/hhast": "^3.28"
+        "hhvm/hhast": "^3.28",
+        "hhvm/hacktest": "^1.0",
+        "facebook/fbexpect": "^2.1.2"
     }
 }

composer.lock

@@ -0,0 +1,29 @@
+<?hh // strict
+/*
+ *  Copyright (c) 2017-present, Facebook, Inc.
+ *  All rights reserved.
+ *
+ *  This source code is licensed under the MIT license found in the
+ *  LICENSE file in the root directory of this source tree.
+ *
+ */
+
+namespace Facebook\DiffLib;
+
+use namespace HH\Lib\{C, Vec};
+use function Facebook\FBExpect\expect;
+
+final class ClusterTest extends \Facebook\HackTest\HackTest {
+  public function testReplaceTrailing(): void {
+    $diff = StringDiff::characters('abc', 'ade')->getDiff()
+      |> cluster($$);
+    expect(C\count($diff))->toBeSame(3);
+    expect($diff[0])->toBeInstanceOf(DiffKeepOp::class);
+    expect($diff[1])->toBeInstanceOf(DiffDeleteOp::class);
+    expect($diff[2])->toBeInstanceOf(DiffInsertOp::class);
+
+    expect(Vec\map($diff, $op ==> $op->getContent()))->toBeSame(
+      vec[vec['a'], vec['b', 'c'], vec['d', 'e']],
+    );
+  }
+}