Add tests to promises

src/Plugin/Tests/Promise/GeocoderFulfilledPromiseTest.php

@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the Geocoder package.
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @license    MIT License
+ */
+
+namespace Geocoder\Plugin\Tests\Promise;
+
+use Geocoder\Collection;
+use Geocoder\Exception\Exception;
+use Geocoder\Exception\LogicException;
+use Geocoder\Plugin\Promise\GeocoderFulfilledPromise;
+use Geocoder\Plugin\Promise\GeocoderRejectedPromise;
+use Http\Promise\Promise;
+use PHPUnit\Framework\TestCase;
+
+class GeocoderFulfilledPromiseTest extends TestCase
+{
+    public function testItReturnsAFulfilledPromise(): void
+    {
+        $collection = $this->createStub(Collection::class);
+        $promise = new GeocoderFulfilledPromise($collection);
+
+        $returnPromise = $promise->then(function (Collection $collection) {
+            return $collection;
+        });
+
+        $this->assertInstanceOf(GeocoderFulfilledPromise::class, $returnPromise);
+        $this->assertSame(Promise::FULFILLED, $returnPromise->getState());
+        $this->assertSame($collection, $returnPromise->wait());
+    }
+
+    public function testItReturnsARejectedPromise(): void
+    {
+        $collection = $this->createStub(Collection::class);
+        $promise = new GeocoderFulfilledPromise($collection);
+
+        $returnPromise = $promise->then(function () {
+            throw new LogicException();
+        });
+
+        $this->assertInstanceOf(GeocoderRejectedPromise::class, $returnPromise);
+        $this->assertSame(Promise::REJECTED, $returnPromise->getState());
+
+        $this->expectException(Exception::class);
+        $returnPromise->wait();
+    }
+
+    public function testItReturnsItselfWhenNoOnRejectedCallbackIsPassed(): void
+    {
+        $collection = $this->createStub(Collection::class);
+        $promise = new GeocoderFulfilledPromise($collection);
+
+        $returnPromise = $promise->then();
+        $this->assertSame($promise, $returnPromise);
+    }
+}

src/Plugin/Tests/Promise/GeocoderRejectedPromiseTest.php

@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the Geocoder package.
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @license    MIT License
+ */
+
+namespace Geocoder\Plugin\Tests\Promise;
+
+use Geocoder\Collection;
+use Geocoder\Exception\Exception;
+use Geocoder\Exception\LogicException;
+use Geocoder\Plugin\Promise\GeocoderFulfilledPromise;
+use Geocoder\Plugin\Promise\GeocoderRejectedPromise;
+use Http\Promise\Promise;
+use PHPUnit\Framework\TestCase;
+
+class GeocoderRejectedPromiseTest extends TestCase
+{
+    public function testItReturnsAFulfilledPromise(): void
+    {
+        $exception = $this->createStub(Exception::class);
+        $promise = new GeocoderRejectedPromise($exception);
+        $collection = $this->createStub(Collection::class);
+
+        $returnPromise = $promise->then(null, function () use ($collection) {
+            return $collection;
+        });
+
+        $this->assertInstanceOf(GeocoderFulfilledPromise::class, $returnPromise);
+        $this->assertSame(Promise::FULFILLED, $returnPromise->getState());
+        $this->assertSame($collection, $returnPromise->wait());
+    }
+
+    public function testItReturnsARejectedPromise(): void
+    {
+        $collection = $this->createStub(Exception::class);
+        $promise = new GeocoderRejectedPromise($collection);
+
+        $returnPromise = $promise->then(null, function () {
+            throw new LogicException();
+        });
+
+        $this->assertInstanceOf(GeocoderRejectedPromise::class, $returnPromise);
+        $this->assertSame(Promise::REJECTED, $returnPromise->getState());
+
+        $this->expectException(Exception::class);
+        $returnPromise->wait();
+    }
+
+    public function testItReturnsItselfWhenNoOnRejectedCallbackIsPassed(): void
+    {
+        $collection = $this->createStub(Exception::class);
+        $promise = new GeocoderRejectedPromise($collection);
+
+        $returnPromise = $promise->then();
+        $this->assertSame($promise, $returnPromise);
+    }
+}