add HasContent tests

Author: jjgrainger

tests/Unit/HTML/Traits/HasContentTest.php

@@ -0,0 +1,85 @@
+<?php
+
+use HTML\Element;
+use PHPUnit\Framework\TestCase;
+
+class HasContentTest extends TestCase
+{
+    public function test_can_set_content()
+    {
+        $element = new Element();
+
+        $element->setContent('Hello World!');
+
+        $this->assertEquals($element->getContent(), 'Hello World!');
+    }
+
+    public function test_can_get_content()
+    {
+        $element = new Element();
+
+        $element->setContent('Hello World!');
+
+        $this->assertEquals($element->getContent(), 'Hello World!');
+    }
+
+    public function test_has_content()
+    {
+        $element = new Element();
+
+        $this->assertFalse($element->hasContent());
+
+        $element->setContent('Hello World!');
+
+        $this->assertTrue($element->hasContent());
+    }
+
+    public function test_can_append_content()
+    {
+        $element = new Element();
+
+        $element->setContent('Hello World!');
+
+        $element->appendContent('Goodbye!');
+
+        $this->assertEquals($element->getContent(), 'Hello World! Goodbye!');
+    }
+
+    public function test_can_append_content_with_separator()
+    {
+        $element = new Element();
+
+        $element->setContent('Hello World!');
+
+        $element->appendContent('Goodbye!', '<br>');
+
+        $this->assertEquals($element->getContent(), 'Hello World!<br>Goodbye!');
+    }
+
+    public function test_can_append_content_when_empty()
+    {
+        $element = new Element();
+
+        $element->appendContent('Goodbye!');
+
+        $this->assertEquals($element->getContent(), 'Goodbye!');
+    }
+
+    public function test_can_render_content()
+    {
+        $element = new Element();
+
+        $element->setContent('Hello World!');
+
+        $this->assertEquals($element->renderContent(), 'Hello World!');
+    }
+
+    public function test_can_render_trimmed_content()
+    {
+        $element = new Element();
+
+        $element->setContent('        Hello World!       ');
+
+        $this->assertEquals($element->renderContent(), 'Hello World!');
+    }
+}