MAGETWO-33240: FPC is permanently invalidated by cron

- added unit test

Author: eddielau

dev/tests/unit/testsuite/Magento/PageCache/Model/Observer/InvalidateCacheIfChangedTest.php

@@ -0,0 +1,86 @@
+<?php
+/**
+ *
+ * Copyright © 2015 Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\PageCache\Model\Observer;
+
+class InvalidateCacheIfChangedTest extends \PHPUnit_Framework_TestCase
+{
+    /** @var \Magento\PageCache\Model\Observer\InvalidateCacheIfChanged */
+    protected $model;
+
+    /** @var \PHPUnit_Framework_MockObject_MockObject|\Magento\PageCache\Model\Config */
+    protected $configMock;
+
+    /** @var  \PHPUnit_Framework_MockObject_MockObject|\Magento\Framework\App\Cache\TypeListInterface */
+    protected $typeListMock;
+
+    /** @var \PHPUnit_Framework_MockObject_MockObject|\Magento\Framework\Event\Observer */
+    protected $observerMock;
+
+    /** @var \PHPUnit_Framework_MockObject_MockObject|\Magento\Framework\Object\IdentityInterface */
+    protected $objectMock;
+
+    /**
+     * Set up all mocks and data for test
+     */
+    public function setUp()
+    {
+        $this->configMock = $this->getMock(
+            'Magento\PageCache\Model\Config',
+            ['getType', 'isEnabled'],
+            [],
+            '',
+            false
+        );
+        $this->typeListMock = $this->getMock('Magento\Framework\App\Cache\TypeList', [], [], '', false);
+
+        $this->model = new \Magento\PageCache\Model\Observer\InvalidateCacheIfChanged(
+            $this->configMock,
+            $this->typeListMock
+        );
+
+        $this->observerMock = $this->getMock('Magento\Framework\Event\Observer', [], [], '', false);
+        $eventMock = $this->getMock('Magento\Framework\Event', ['getObject'], [], '', false);
+        $this->objectMock = $this->getMockForAbstractClass('Magento\Framework\Object\IdentityInterface', [], '', false);
+        $eventMock->expects($this->any())->method('getObject')->willReturn($this->objectMock);
+        $this->observerMock->expects($this->any())->method('getEvent')->willReturn($eventMock);
+    }
+
+    /**
+     * @dataProvider invalidateCacheDataProvider
+     * @param bool $cacheState
+     */
+    public function testExecuteChanged($cacheState)
+    {
+        $this->configMock->expects($this->once())->method('isEnabled')->will($this->returnValue($cacheState));
+
+        if ($cacheState) {
+            $this->typeListMock->expects($this->once())->method('invalidate')->with($this->equalTo('full_page'));
+            $this->objectMock->expects($this->once())->method('getIdentities')->will($this->returnValue(['tag_1']));
+        }
+        $this->model->execute($this->observerMock);
+    }
+
+    /**
+     * @dataProvider invalidateCacheDataProvider
+     * @param bool $cacheState
+     */
+    public function testExecuteNoChanged($cacheState)
+    {
+        $this->configMock->expects($this->once())->method('isEnabled')->will($this->returnValue($cacheState));
+        $this->typeListMock->expects($this->never())->method('invalidate');
+
+        if ($cacheState) {
+            $this->objectMock->expects($this->once())->method('getIdentities')->will($this->returnValue([]));
+        }
+        $this->model->execute($this->observerMock);
+    }
+
+    public function invalidateCacheDataProvider()
+    {
+        return [[true], [false]];
+    }
+}