Added Tests and Migrations

phpunit.xml.dist

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+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit backupGlobals="false" backupStaticAttributes="false" bootstrap="vendor/autoload.php" colors="true" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" processIsolation="false" stopOnFailure="false">
+  <coverage>
+    <include>
+      <directory suffix=".php">src/</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="Package Test Suite">
+      <directory suffix=".php">./tests/</directory>
+    </testsuite>
+  </testsuites>
+</phpunit>

tests/AggregateTest.php

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+<?php
+
+namespace nhalstead\Transferable\Tests;
+
+use Illuminate\Support\Facades\DB;
+use Illuminate\Database\Eloquent\Model;
+use nhalstead\Transferable\Exceptions\DanglingRelationships;
+use nhalstead\Transferable\Interfaces\NoDanglingRelationships;
+use nhalstead\Transferable\Traits\TransferableRelationship;
+
+class AggregateTest extends TestCase
+{
+    public function setUp(): void
+    {
+        parent::setUp();
+
+		DB::table('genres')->insert([
+			["name" => "Fiction"],
+			["name" => "Science Fiction"],
+			["name" => "Action Adventure"],
+		]);
+
+        DB::table('books')->insert([
+			["title" => "Catching Fire", "genre_id" => 1],
+			["title" => "The Hunger Games", "genre_id" => 1],
+            ["title" => "Nineteen Eighty-Four", "genre_id" => 2],
+            ["title" => "The Martian", "genre_id" => 2],
+            ["title" => "Treasure Island", "genre_id" => 3],
+            ["title" => "Hatchet", "genre_id" => 3],
+        ]);
+    }
+
+	public function testCheckDangling()
+	{
+		$all = Genre::all();
+
+		foreach($all as $genre) {
+			$this->assertEquals(2, $genre->countTransferable());
+		}
+	}
+
+    public function testRejectDeleteWhileContainsDangling()
+    {
+
+    	$category = Genre::find(2);
+
+		$this->assertEquals(2, $category->books()->count());
+    	$this->expectException(DanglingRelationships::class);
+    	$category->delete();
+    }
+
+    public function testDeleteAfterTransferDanglingDryRun()
+    {
+		$newCategory = Genre::find(1);
+		$category = Genre::find(2);
+
+		$this->assertEquals(2, $category->countTransferable());
+
+		$changed = $category->transferTo($newCategory, true);
+		$this->assertEquals(2, $changed);
+
+		$this->assertEquals(4, $newCategory->countTransferable());
+		$this->assertEquals(2, $category->countTransferable());
+    }
+
+    public function testDeleteAfterTransferDangling()
+    {
+		$newCategory = Genre::find(1);
+		$category = Genre::find(2);
+
+		$this->assertEquals(2, $category->countTransferable());
+
+		$changed = $category->transferTo($newCategory);
+		$this->assertEquals(2, $changed);
+
+		$this->assertEquals(4, $newCategory->countTransferable());
+		$this->assertEquals(0, $category->countTransferable());
+
+    	$category->delete();
+    }
+
+}
+
+class Book extends Model
+{
+	public function genre()
+	{
+		return $this->belongsTo(Genre::class);
+	}
+}
+
+class Genre extends Model implements NoDanglingRelationships
+{
+	use TransferableRelationship;
+
+	protected $transferable = [
+		"books"
+	];
+
+	public function books()
+	{
+		return $this->hasMany(Book::class);
+	}
+}

tests/TestCase.php

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+<?php
+
+namespace nhalstead\Transferable\Tests;
+
+use Orchestra\Testbench\TestCase as BaseTestCase;
+
+abstract class TestCase extends BaseTestCase
+{
+    public function setUp() : void
+    {
+        parent::setUp();
+
+        $this->loadMigrationsFrom(__DIR__ . '/database/migrations');
+
+        $this->artisan('migrate');
+    }
+
+    protected function getEnvironmentSetUp($app)
+    {
+        $app['config']->set('database.default', 'testbench');
+
+        $app['config']->set('database.connections.testbench', [
+            'driver'   => 'sqlite',
+            'database' => ':memory:',
+            'prefix'   => '',
+        ]);
+    }
+}

tests/database/migrations/2020_10_11_000000_create_genres_table.php

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+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateGenresTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create("genres", function (Blueprint $table) {
+            $table->increments("id");
+            $table->string("name");
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists("genres");
+    }
+}

tests/database/migrations/2020_10_12_000000_create_books_table.php

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+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateBooksTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create("books", function (Blueprint $table) {
+            $table->increments("id");
+            $table->string("title");
+            $table->integer("genre_id")->unsigned();
+            $table->foreign("genre_id")->references("id")->on("genres");
+			$table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists("books");
+    }
+}