[TASK] Add some rendering tests for Document (#1138)

Part of #757

Author: oliverklee

tests/Functional/CSSList/DocumentTest.php

@@ -0,0 +1,137 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Functional\CSSList;
+
+use PHPUnit\Framework\TestCase;
+use Sabberworm\CSS\CSSList\AtRuleBlockList;
+use Sabberworm\CSS\CSSList\Document;
+use Sabberworm\CSS\OutputFormat;
+use Sabberworm\CSS\Property\Charset;
+use Sabberworm\CSS\Value\CSSString;
+
+/**
+ * @covers \Sabberworm\CSS\CSSList\Document
+ */
+final class DocumentTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function renderWithoutOutputFormatCanRenderEmptyDocument(): void
+    {
+        $subject = new Document();
+
+        self::assertSame('', $subject->render());
+    }
+
+    /**
+     * @test
+     */
+    public function renderWithVirginOutputFormatCanRenderEmptyDocument(): void
+    {
+        $subject = new Document();
+
+        self::assertSame('', $subject->render(new OutputFormat()));
+    }
+
+    /**
+     * @test
+     */
+    public function renderWithDefaultOutputFormatCanRenderEmptyDocument(): void
+    {
+        $subject = new Document();
+
+        self::assertSame('', $subject->render(OutputFormat::create()));
+    }
+
+    /**
+     * @test
+     */
+    public function renderWithCompactOutputFormatCanRenderEmptyDocument(): void
+    {
+        $subject = new Document();
+
+        self::assertSame('', $subject->render(OutputFormat::createCompact()));
+    }
+
+    /**
+     * @test
+     */
+    public function renderWithPrettyOutputFormatCanRenderEmptyDocument(): void
+    {
+        $subject = new Document();
+
+        self::assertSame('', $subject->render(OutputFormat::createPretty()));
+    }
+
+    /**
+     * Builds a subject with one `@charset` rule and one `@media` rule.
+     */
+    private function buildSubjectWithAtRules(): Document
+    {
+        $subject = new Document();
+        $charset = new Charset(new CSSString('UTF-8'));
+        $subject->append($charset);
+        $mediaQuery = new AtRuleBlockList('media', 'screen');
+        $subject->append($mediaQuery);
+
+        return $subject;
+    }
+
+    /**
+     * @test
+     */
+    public function renderWithoutOutputFormatCanRenderAtRules(): void
+    {
+        $subject = $this->buildSubjectWithAtRules();
+
+        $expected = '@charset "UTF-8";' . "\n" . '@media screen {}';
+        self::assertSame($expected, $subject->render());
+    }
+
+    /**
+     * @test
+     */
+    public function renderWithVirginOutputFormatCanRenderAtRules(): void
+    {
+        $subject = $this->buildSubjectWithAtRules();
+
+        $expected = '@charset "UTF-8";' . "\n" . '@media screen {}';
+        self::assertSame($expected, $subject->render(new OutputFormat()));
+    }
+
+    /**
+     * @test
+     */
+    public function renderWithDefaultOutputFormatCanRenderAtRules(): void
+    {
+        $subject = $this->buildSubjectWithAtRules();
+
+        $expected = '@charset "UTF-8";' . "\n" . '@media screen {}';
+        self::assertSame($expected, $subject->render(OutputFormat::create()));
+    }
+
+    /**
+     * @test
+     */
+    public function renderWithCompactOutputFormatCanRenderAtRules(): void
+    {
+        $subject = $this->buildSubjectWithAtRules();
+
+        $expected = '@charset "UTF-8";@media screen{}';
+        self::assertSame($expected, $subject->render(OutputFormat::createCompact()));
+    }
+
+    /**
+     * @test
+     */
+    public function renderWithPrettyOutputFormatCanRenderAtRules(): void
+    {
+        $subject = $this->buildSubjectWithAtRules();
+
+        $expected = "\n" . '@charset "UTF-8";' . "\n\n" . '@media screen {}' . "\n";
+        self::assertSame($expected, $subject->render(OutputFormat::createPretty()));
+    }
+}