Added unit tests for coupon code sanitization

tests/legacy/framework/class-wc-unit-test-case.php

@@ -171,9 +171,9 @@ class WC_Unit_Test_Case extends WP_HTTP_TestCase {
 	 */
 	public function login_as_administrator() {
 		return $this->login_as_role( 'administrator' );
-  }
+	}
 
-  /**
+	/**
 	 * Get an instance of a class that has been registered in the dependency injection container.
 	 * To get an instance of a legacy class (such as the ones in the 'íncludes' directory) use
 	 * 'get_legacy_instance_of' instead.

tests/php/includes/class-wc-post-data-test.php

@@ -0,0 +1,35 @@
+<?php
+/**
+ * Post data tests
+ *
+ * @package WooCommerce\Tests\Post_Data.
+ */
+
+/**
+ * Class WC_Post_Data_Test
+ */
+class WC_Post_Data_Test extends \WC_Unit_Test_Case {
+
+	/**
+	 * @testdox coupon code should be always sanitized.
+	 */
+	public function test_coupon_code_sanitization() {
+		$this->login_as_role( 'shop_manager' );
+		$coupon    = WC_Helper_Coupon::create_coupon( 'a&a' );
+		$post_data = get_post( $coupon->get_id() );
+		$this->assertEquals( 'a&amp;a', $post_data->post_title );
+		$coupon->delete( true );
+
+		$this->login_as_administrator();
+		$coupon    = WC_Helper_Coupon::create_coupon( 'b&b' );
+		$post_data = get_post( $coupon->get_id() );
+		$this->assertEquals( 'b&amp;b', $post_data->post_title );
+		$coupon->delete( true );
+
+		wp_set_current_user( 0 );
+		$coupon    = WC_Helper_Coupon::create_coupon( 'c&c' );
+		$post_data = get_post( $coupon->get_id() );
+		$this->assertEquals( 'c&amp;c', $post_data->post_title );
+		$coupon->delete( true );
+	}
+}

tests/php/includes/wc-formatting-functions-test.php

@@ -0,0 +1,20 @@
+<?php
+/**
+ * Formatting functions tests
+ *
+ * @package WooCommerce\Tests\Formatting.
+ */
+
+/**
+ * Class WC_Formatting_Functions_Test
+ */
+class WC_Formatting_Functions_Test extends \WC_Unit_Test_Case {
+
+	/**
+	 * Test wc_sanitize_coupon_code() function.
+	 */
+	public function test_wc_sanitize_coupon_code() {
+		$this->assertEquals( 'DUMMYCOUPON', wc_sanitize_coupon_code( 'DUMMYCOUPON' ) );
+		$this->assertEquals( 'a&amp;a', wc_sanitize_coupon_code( 'a&a' ) );
+	}
+}