Add tests for ::copy().

Author: costdev

tests/phpunit/tests/filesystem/wpFilesystemDirect/copy.php

@@ -0,0 +1,73 @@
+<?php
+/**
+ * Tests for the WP_Filesystem_Direct::copy() method.
+ *
+ * @package WordPress
+ */
+
+require_once __DIR__ . '/base.php';
+
+/**
+ * @group admin
+ * @group filesystem
+ * @group filesystem-direct
+ *
+ * @covers WP_Filesystem_Direct::copy
+ */
+class Tests_Filesystem_WpFilesystemDirect_Copy extends WP_Filesystem_Direct_UnitTestCase {
+
+	/**
+	 * Tests that `WP_Filesystem_Direct::copy()` overwrites an existing
+	 * destination when overwriting is enabled.
+	 *
+	 * @ticket 57774
+	 */
+	public function test_should_overwrite_an_existing_file_when_overwriting_is_enabled() {
+		$source      = self::$file_structure['visible_file']['path'];
+		$destination = self::$file_structure['test_dir']['path'] . 'a_file_that_exists.dest';
+
+		if ( ! file_exists( $destination ) ) {
+			touch( $destination );
+		}
+
+		$actual = self::$filesystem->copy( $source, $destination, true );
+
+		unlink( $destination );
+
+		$this->assertTrue( $actual );
+	}
+
+	/**
+	 * Tests that `WP_Filesystem_Direct::copy()` does not overwrite
+	 * an existing destination when overwriting is disabled.
+	 *
+	 * @ticket 57774
+	 */
+	public function test_should_not_overwrite_an_existing_file_when_overwriting_is_disabled() {
+		$source      = self::$file_structure['test_dir']['path'] . 'a_file_that_exists.txt';
+		$destination = self::$file_structure['test_dir']['path'] . 'a_file_that_exists.dest';
+
+		if ( ! file_exists( $destination ) ) {
+			touch( $destination );
+		}
+
+		$actual = self::$filesystem->copy( $source, $destination );
+
+		unlink( $destination );
+
+		$this->assertFalse( $actual );
+	}
+
+	/**
+	 * Tests that `WP_Filesystem_Direct::copy()` does not overwrite an existing
+	 * destination when overwriting is enabled and the source and destination
+	 * are the same.
+	 *
+	 * @ticket 57774
+	 */
+	public function test_should_not_overwrite_when_overwriting_is_enabled_and_source_and_destination_are_the_same() {
+		$source = self::$file_structure['test_dir']['path'] . 'a_file_that_exists.txt';
+		$this->assertFalse( self::$filesystem->copy( $source, $source, true ) );
+	}
+
+}