CopyTest.php

<?php

namespace Drupal\Tests\file\Kernel;

use Drupal\Core\File\FileSystemInterface;
use Drupal\file\Entity\File;

/**
 * Tests the file copy function.
 *
 * @group file
 */
class CopyTest extends FileManagedUnitTestBase {
    
    /**
     * Test file copying in the normal, base case.
     */
    public function testNormal() {
        $contents = $this->randomMachineName(10);
        $source = $this->createFile(NULL, $contents);
        $desired_uri = 'public://' . $this->randomMachineName();
        // Clone the object so we don't have to worry about the function changing
        // our reference copy.
        $result = file_copy(clone $source, $desired_uri, FileSystemInterface::EXISTS_ERROR);
        // Check the return status and that the contents changed.
        $this->assertNotFalse($result, 'File copied successfully.');
        $this->assertEqual($contents, file_get_contents($result->getFileUri()), 'Contents of file were copied correctly.');
        // Check that the correct hooks were called.
        $this->assertFileHooksCalled([
            'copy',
            'insert',
        ]);
        $this->assertDifferentFile($source, $result);
        $this->assertEqual($result->getFileUri(), $desired_uri, 'The copied file entity has the desired filepath.');
        $this->assertFileExists($source->getFileUri());
        $this->assertFileExists($result->getFileUri());
        // Reload the file from the database and check that the changes were
        // actually saved.
        $this->assertFileUnchanged($result, File::load($result->id()));
    }
    
    /**
     * Test renaming when copying over a file that already exists.
     */
    public function testExistingRename() {
        // Setup a file to overwrite.
        $contents = $this->randomMachineName(10);
        $source = $this->createFile(NULL, $contents);
        $target = $this->createFile();
        $this->assertDifferentFile($source, $target);
        // Clone the object so we don't have to worry about the function changing
        // our reference copy.
        $result = file_copy(clone $source, $target->getFileUri(), FileSystemInterface::EXISTS_RENAME);
        // Check the return status and that the contents changed.
        $this->assertNotFalse($result, 'File copied successfully.');
        $this->assertEqual($contents, file_get_contents($result->getFileUri()), 'Contents of file were copied correctly.');
        $this->assertNotEqual($result->getFileUri(), $source->getFileUri(), 'Returned file path has changed from the original.');
        // Check that the correct hooks were called.
        $this->assertFileHooksCalled([
            'copy',
            'insert',
        ]);
        // Load all the affected files to check the changes that actually made it
        // to the database.
        $loaded_source = File::load($source->id());
        $loaded_target = File::load($target->id());
        $loaded_result = File::load($result->id());
        // Verify that the source file wasn't changed.
        $this->assertFileUnchanged($source, $loaded_source);
        // Verify that what was returned is what's in the database.
        $this->assertFileUnchanged($result, $loaded_result);
        // Make sure we end up with three distinct files afterwards.
        $this->assertDifferentFile($loaded_source, $loaded_target);
        $this->assertDifferentFile($loaded_target, $loaded_result);
        $this->assertDifferentFile($loaded_source, $loaded_result);
    }
    
    /**
     * Test replacement when copying over a file that already exists.
     */
    public function testExistingReplace() {
        // Setup a file to overwrite.
        $contents = $this->randomMachineName(10);
        $source = $this->createFile(NULL, $contents);
        $target = $this->createFile();
        $this->assertDifferentFile($source, $target);
        // Clone the object so we don't have to worry about the function changing
        // our reference copy.
        $result = file_copy(clone $source, $target->getFileUri(), FileSystemInterface::EXISTS_REPLACE);
        // Check the return status and that the contents changed.
        $this->assertNotFalse($result, 'File copied successfully.');
        $this->assertEqual($contents, file_get_contents($result->getFileUri()), 'Contents of file were overwritten.');
        $this->assertDifferentFile($source, $result);
        // Check that the correct hooks were called.
        $this->assertFileHooksCalled([
            'load',
            'copy',
            'update',
        ]);
        // Load all the affected files to check the changes that actually made it
        // to the database.
        $loaded_source = File::load($source->id());
        $loaded_target = File::load($target->id());
        $loaded_result = File::load($result->id());
        // Verify that the source file wasn't changed.
        $this->assertFileUnchanged($source, $loaded_source);
        // Verify that what was returned is what's in the database.
        $this->assertFileUnchanged($result, $loaded_result);
        // Target file was reused for the result.
        $this->assertFileUnchanged($loaded_target, $loaded_result);
    }
    
    /**
     * Test that copying over an existing file fails when instructed to do so.
     */
    public function testExistingError() {
        $contents = $this->randomMachineName(10);
        $source = $this->createFile();
        $target = $this->createFile(NULL, $contents);
        $this->assertDifferentFile($source, $target);
        // Clone the object so we don't have to worry about the function changing
        // our reference copy.
        $result = file_copy(clone $source, $target->getFileUri(), FileSystemInterface::EXISTS_ERROR);
        // Check the return status and that the contents were not changed.
        $this->assertFalse($result, 'File copy failed.');
        $this->assertEqual($contents, file_get_contents($target->getFileUri()), 'Contents of file were not altered.');
        // Check that the correct hooks were called.
        $this->assertFileHooksCalled([]);
        $this->assertFileUnchanged($source, File::load($source->id()));
        $this->assertFileUnchanged($target, File::load($target->id()));
    }

}