Add some basic PDF tests

README.md

@@ -178,6 +178,15 @@ function generate_pdf() {
 
 Find more information to `SetProtection()` here: https://mpdf.github.io/reference/mpdf-functions/setprotection.html
 
+## Testing
+
+To use the testing suite, you need some extensions and binaries for your local PHP. On macOS, you can install them like this:
+
+```
+pecl install imagick
+brew install ghostscript
+```
+
 ## License
 
 Laravel PDF is open-sourced software licensed under the [MIT license](http://opensource.org/licenses/MIT)

composer.json

@@ -3,6 +3,9 @@
     "description": "Generate PDFs in Laravel with this mPDF wrapper.",
     "keywords": ["mpdf", "pdf", "laravel"],
     "license": "MIT",
+    "scripts": {
+        "test": "phpunit --colors=always"
+    },
     "require": {
         "php": ">=7.0",
         "mpdf/mpdf": "^7.0"
@@ -12,6 +15,11 @@
             "niklasravnsborg\\LaravelPdf\\": "src/LaravelPdf"
         }
     },
+    "autoload-dev": {
+        "psr-4": {
+            "niklasravnsborg\\LaravelPdf\\Test\\": "tests/"
+        }
+    },
     "extra": {
         "laravel": {
             "providers": [
@@ -21,5 +29,9 @@
                 "PDF": "niklasravnsborg\\LaravelPdf\\Facades\\Pdf"
             }
         }
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^7.4",
+        "orchestra/testbench": "^3.7"
     }
 }

phpunit.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit bootstrap="vendor/autoload.php"
+         backupGlobals="false"
+         backupStaticAttributes="false"
+         colors="true"
+         verbose="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="false"
+         stopOnFailure="false">
+    <testsuites>
+        <testsuite name="default">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <whitelist>
+            <directory suffix=".php">src/</directory>
+        </whitelist>
+    </filter>
+</phpunit>

tests/PdfTest.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace niklasravnsborg\LaravelPdf\Test;
+
+use PDF;
+use Imagick;
+
+class PdfTest extends TestCase
+{
+	public function testSimplePdfIsCorrect()
+	{
+		$pdf = PDF::loadHTML('<p>This gets tested!</p>');
+		$this->compareToSnapshot('simple', $pdf->output());
+	}
+
+	public function testExposifyPdfExposeIsCorrect()
+	{
+		$pdf = PDF::loadFile('tests/views/exposify-expose.html');
+		$this->compareToSnapshot('exposify', $pdf->output());
+	}
+
+	protected function compareToSnapshot($snapshotId, $data)
+	{
+		$snapshotFile = "tests/snapshots/{$snapshotId}.pdf";
+
+		// create snapshot if it doesn't exist
+		if (!file_exists($snapshotFile)) {
+			file_put_contents($snapshotFile, $data);
+			return;
+		}
+
+		$snapshot = file_get_contents($snapshotFile);
+		$this->assertPdfsLookTheSame($snapshot, $data);
+	}
+
+	public function assertPdfsLookTheSame($pdf1, $pdf2, $message = '')
+	{
+		$assertedImagick = new Imagick();
+		$assertedImagick->readImageBlob($pdf1);
+		$assertedImagick->resetIterator();
+		$assertedImagick = $assertedImagick->appendImages(true);
+		$testImagick = new Imagick();
+		$testImagick->readImageBlob($pdf2);
+		$testImagick->resetIterator();
+		$testImagick = $testImagick->appendImages(true);
+
+		$diff = $assertedImagick->compareImages($testImagick, 1);
+		$pdfsLookTheSame = 0.0 == $diff[1];
+		self::assertTrue($pdfsLookTheSame, 'Failed asserting that PDFs look the same.');
+	}
+}

tests/TestCase.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace niklasravnsborg\LaravelPdf\Test;
+
+use niklasravnsborg\LaravelPdf\Facades\Pdf;
+use niklasravnsborg\LaravelPdf\PdfServiceProvider;
+use Orchestra\Testbench\TestCase as OrchestraTestCase;
+
+class TestCase extends OrchestraTestCase {
+	/**
+	 * Load package service provider
+	 * @param  \Illuminate\Foundation\Application $app
+	 * @return lasselehtinen\MyPackage\MyPackageServiceProvider
+	 */
+	protected function getPackageProviders($app)
+	{
+		return [PdfServiceProvider::class];
+	}
+
+	/**
+	 * Load package alias
+	 * @param  \Illuminate\Foundation\Application $app
+	 * @return array
+	 */
+	protected function getPackageAliases($app)
+	{
+		return [
+			'PDF' => Pdf::class,
+		];
+	}
+}