Add unit test, linting

src/Services/ReadOnlyCacheService.php

@@ -10,6 +10,7 @@
  */
 class ReadOnlyCacheService
 {
+
     use Injectable;
 
     private $enabled = false;

tests/php/Services/ReadOnlyCacheServiceTest.php

@@ -0,0 +1,38 @@
+<?php
+
+use SilverStripe\Assets\Services\ReadOnlyCacheService;
+use SilverStripe\Dev\SapphireTest;
+
+class ReadOnlyCacheServiceTest extends SapphireTest
+{
+
+    public function testGetSetEnabled()
+    {
+        $service = ReadOnlyCacheService::singleton();
+        $this->assertFalse($service->getEnabled());
+        $service->setEnabled(true);
+        $this->assertTrue($service->getEnabled());
+    }
+
+    public function testGetSetHasValue()
+    {
+        $service = ReadOnlyCacheService::singleton();
+        $this->assertFalse($service->hasValue(['A', 'B'], ['1', '2']));
+        $service->setValue(['A', 'B'], ['1', '2'], 'xyz');
+        $this->assertTrue($service->hasValue(['A', 'B'], ['1', '2']));
+        $this->assertEquals('xyz', $service->getValue(['A', 'B'], ['1', '2']));
+    }
+
+    public function testReset()
+    {
+        $service = ReadOnlyCacheService::singleton();
+        $service->setValue(['A', 'B'], ['1', '2'], 'xyz');
+        $service->setValue(['C', 'D'], ['3', '4'], 'wvu');
+        $this->assertTrue($service->hasValue(['A', 'B'], ['1', '2']));
+        $service->reset(['A', 'B']);
+        $this->assertFalse($service->hasValue(['A', 'B'], ['1', '2']));
+        $this->assertTrue($service->hasValue(['C', 'D'], ['3', '4']));
+        $service->reset();
+        $this->assertFalse($service->hasValue(['C', 'D'], ['3', '4']));
+    }
+}