Adjust ImageManager tests for png generation

Signed-off-by: Julius Härtl <jus@bitgrid.net>

apps/theming/lib/ImageManager.php

 use OCP\Files\NotPermittedException;
 use OCP\IURLGenerator;
 
-/**
- * @property IURLGenerator urlGenerator
- */
 class ImageManager {
 
 	/** @var IConfig */
 	 * @param IConfig $config
 	 * @param IAppData $appData
 	 * @param IURLGenerator $urlGenerator
-	 * @param ThemingDefaults $themingDefaults
+	 * @param ICacheFactory $cacheFactory
 	 */
 	public function __construct(IConfig $config,
 								IAppData $appData,
 	 */
 	public function getImage(string $key, bool $useSvg = false): ISimpleFile {
 		$logo = $this->config->getAppValue('theming', $key . 'Mime', false);
-		if ($logo === false) {
+		$folder = $this->appData->getFolder('images');
+		if ($logo === false || !$folder->fileExists($key)) {
 			throw new NotFoundException();
 		}
-		$folder = $this->appData->getFolder('images');
 		if (!$useSvg && $this->shouldReplaceIcons()) {
 			if (!$folder->fileExists($key . '.png')) {
 				try {

apps/theming/tests/ImageManagerTest.php

 use OCA\Theming\ImageManager;
 use OCA\Theming\ThemingDefaults;
 use OCP\Files\SimpleFS\ISimpleFile;
+use OCP\ICacheFactory;
 use OCP\IConfig;
 use OCP\IURLGenerator;
 use Test\TestCase;
 	protected $imageManager;
 	/** @var IURLGenerator|\PHPUnit_Framework_MockObject_MockObject */
 	private $urlGenerator;
+	/** @var ICacheFactory|\PHPUnit_Framework_MockObject_MockObject */
+	private $cacheFactory;
 
 	protected function setUp() {
 		parent::setUp();
 		$this->config = $this->createMock(IConfig::class);
 		$this->appData = $this->createMock(IAppData::class);
 		$this->urlGenerator = $this->createMock(IURLGenerator::class);
+		$this->cacheFactory = $this->createMock(ICacheFactory::class);
 		$this->imageManager = new ImageManager(
 			$this->config,
 			$this->appData,
-			$this->urlGenerator
+			$this->urlGenerator,
+			$this->cacheFactory
 		);
 	}
 
+	private function checkImagick() {
+		if(!extension_loaded('imagick')) {
+			$this->markTestSkipped('Imagemagick is required for dynamic icon generation.');
+		}
+		$checkImagick = new \Imagick();
+		if (count($checkImagick->queryFormats('SVG')) < 1) {
+			$this->markTestSkipped('No SVG provider present.');
+		}
+		if (count($checkImagick->queryFormats('PNG')) < 1) {
+			$this->markTestSkipped('No PNG provider present.');
+		}
+	}
+
 	public function mockGetImage($key, $file) {
 		/** @var \PHPUnit_Framework_MockObject_MockObject $folder */
 		$folder = $this->createMock(ISimpleFolder::class);
 				->with('logo')
 				->willThrowException(new NotFoundException());
 		} else {
-			$folder->expects($this->once())
+			$file->expects($this->once())
+				->method('getContent')
+				->willReturn(file_get_contents(__DIR__ . '/../../../tests/data/testimage.png'));
+			$folder->expects($this->at(0))
+				->method('fileExists')
+				->with('logo')
+				->willReturn(true);
+			$folder->expects($this->at(1))
+				->method('fileExists')
+				->with('logo.png')
+				->willReturn(false);
+			$folder->expects($this->at(2))
 				->method('getFile')
 				->with('logo')
 				->willReturn($file);
+			$newFile = $this->createMock(ISimpleFile::class);
+			$folder->expects($this->at(3))
+				->method('newFile')
+				->with('logo.png')
+				->willReturn($newFile);
+			$newFile->expects($this->once())
+				->method('putContent');
 			$this->appData->expects($this->once())
 				->method('getFolder')
 				->with('images')
 	}
 
 	public function testGetImageUrl() {
+		$this->checkImagick();
 		$file = $this->createMock(ISimpleFile::class);
 		$this->config->expects($this->exactly(2))
 			->method('getAppValue')
 			->withConsecutive(
 				['theming', 'cachebuster', '0'],
-				['theming', 'logoMime', false]
+				['theming', 'logoMime', '']
 				)
 			->willReturn(0);
 		$this->mockGetImage('logo', $file);
 	}
 
 	public function testGetImageUrlAbsolute() {
+		$this->checkImagick();
 		$file = $this->createMock(ISimpleFile::class);
 		$this->config->expects($this->exactly(2))
 			->method('getAppValue')
 			->withConsecutive(
 				['theming', 'cachebuster', '0'],
-				['theming', 'logoMime', false]
+				['theming', 'logoMime', '']
 			)
 			->willReturn(0);
 		$this->mockGetImage('logo', $file);
 		$this->urlGenerator->expects($this->at(0))
-			->method('linkToRoute')
-			->willReturn('url-to-image');
+			->method('getBaseUrl')
+			->willReturn('baseurl');
 		$this->urlGenerator->expects($this->at(1))
 			->method('getAbsoluteUrl')
-			->with('url-to-image?v=0')
+			->willReturn('url-to-image-absolute?v=0');
+		$this->urlGenerator->expects($this->at(2))
+			->method('getAbsoluteUrl')
 			->willReturn('url-to-image-absolute?v=0');
 		$this->assertEquals('url-to-image-absolute?v=0', $this->imageManager->getImageUrlAbsolute('logo'));
 
 	}
 
 	public function testGetImage() {
+		$this->checkImagick();
 		$this->config->expects($this->once())
 			->method('getAppValue')->with('theming', 'logoMime', false)
 			->willReturn('png');