Add unit tests (#1090)

| Q               | A
| --------------- | -----
| Bug fix?        | no
| New feature?    | no
| BC breaks?      | no
| Deprecations?   | no
| Related tickets |
#939
| License         | MIT

Added unit tests. This directory didn't own any spec tests.

Author: Rafikooo

tests/Bundle/ExpressionLanguage/ExpressionLanguageTest.php

@@ -0,0 +1,74 @@
+<?php
+
+/*
+ * This file is part of the Sylius package.
+ *
+ * (c) Sylius Sp. z o.o.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Sylius\Bundle\ResourceBundle\Tests\ExpressionLanguage;
+
+use PHPUnit\Framework\TestCase;
+use Psr\Cache\CacheItemPoolInterface;
+use Sylius\Bundle\ResourceBundle\ExpressionLanguage\ExpressionLanguage;
+use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
+
+final class ExpressionLanguageTest extends TestCase
+{
+    public function testItCanBeInstantiatedWithoutCache(): void
+    {
+        $expressionLanguage = new ExpressionLanguage();
+
+        $this->assertInstanceOf(ExpressionLanguage::class, $expressionLanguage);
+    }
+
+    public function testItCanBeInstantiatedWithCacheItemPool(): void
+    {
+        $cache = $this->createMock(CacheItemPoolInterface::class);
+
+        $expressionLanguage = new ExpressionLanguage($cache);
+
+        $this->assertInstanceOf(ExpressionLanguage::class, $expressionLanguage);
+    }
+
+    public function testItCanBeInstantiatedWithProviders(): void
+    {
+        $provider = $this->createMock(ExpressionFunctionProviderInterface::class);
+        $provider->method('getFunctions')->willReturn([]);
+
+        $expressionLanguage = new ExpressionLanguage(null, [$provider]);
+
+        $this->assertInstanceOf(ExpressionLanguage::class, $expressionLanguage);
+    }
+
+    public function testItThrowsExceptionForInvalidCacheType(): void
+    {
+        $this->expectException(\InvalidArgumentException::class);
+        $this->expectExceptionMessage('Cache argument has to implement Psr\Cache\CacheItemPoolInterface');
+
+        new ExpressionLanguage('invalid');
+    }
+
+    public function testItRegistersNotNullExpressionFunctionProvider(): void
+    {
+        $expressionLanguage = new ExpressionLanguage();
+
+        $result = $expressionLanguage->evaluate('notFoundOnNull(value)', ['value' => 'test']);
+
+        $this->assertSame('test', $result);
+    }
+
+    public function testItCompilesExpressionsWithNotFoundOnNullFunction(): void
+    {
+        $expressionLanguage = new ExpressionLanguage();
+
+        $compiled = $expressionLanguage->compile('notFoundOnNull(value)', ['value']);
+
+        $this->assertStringContainsString('null !== ', $compiled);
+    }
+}

tests/Bundle/ExpressionLanguage/NotNullExpressionFunctionProviderTest.php

@@ -0,0 +1,78 @@
+<?php
+
+/*
+ * This file is part of the Sylius package.
+ *
+ * (c) Sylius Sp. z o.o.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Sylius\Bundle\ResourceBundle\Tests\ExpressionLanguage;
+
+use PHPUnit\Framework\TestCase;
+use Sylius\Bundle\ResourceBundle\ExpressionLanguage\NotNullExpressionFunctionProvider;
+use Symfony\Component\ExpressionLanguage\ExpressionFunction;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+
+final class NotNullExpressionFunctionProviderTest extends TestCase
+{
+    private NotNullExpressionFunctionProvider $provider;
+
+    protected function setUp(): void
+    {
+        $this->provider = new NotNullExpressionFunctionProvider();
+    }
+
+    public function testItProvidesExpressionFunctions(): void
+    {
+        $functions = $this->provider->getFunctions();
+
+        $this->assertIsArray($functions);
+        $this->assertCount(1, $functions);
+        $this->assertInstanceOf(ExpressionFunction::class, $functions[0]);
+    }
+
+    public function testItProvidesNotFoundOnNullFunction(): void
+    {
+        $functions = $this->provider->getFunctions();
+
+        $this->assertSame('notFoundOnNull', $functions[0]->getName());
+    }
+
+    public function testItReturnsValueWhenNotNull(): void
+    {
+        $functions = $this->provider->getFunctions();
+        $evaluator = $functions[0]->getEvaluator();
+
+        $result = $evaluator([], 'some value');
+
+        $this->assertSame('some value', $result);
+    }
+
+    public function testItThrowsNotFoundExceptionWhenNull(): void
+    {
+        $functions = $this->provider->getFunctions();
+        $evaluator = $functions[0]->getEvaluator();
+
+        $this->expectException(NotFoundHttpException::class);
+        $this->expectExceptionMessage('Requested page is invalid.');
+
+        $evaluator([], null);
+    }
+
+    public function testItCompilesExpressionCorrectly(): void
+    {
+        $functions = $this->provider->getFunctions();
+        $compiler = $functions[0]->getCompiler();
+
+        $compiled = $compiler('$result');
+
+        $this->assertStringContainsString('null !== $result', $compiled);
+        $this->assertStringContainsString('$result', $compiled);
+        $this->assertStringContainsString('throw new NotFoundHttpException', $compiled);
+    }
+}