When dbDelta() is checking whether an index is defined in a CREATE TABLE statement, don't worry if MySQL has a subpart defined on an index, but the CREATE TABLE doesn't.

Fixes #31869.



git-svn-id: https://develop.svn.wordpress.org/trunk@32108 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/dbdelta.php

@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * Test dbDelta()
+ *
+ * @group upgrade
+ * @group dbdelta
+ */
+class Tests_dbDelta extends WP_UnitTestCase {
+
+	function test_create_new_table() {
+		include_once( ABSPATH . 'wp-admin/includes/upgrade.php');
+		$table_name = 'test_new_table';
+
+		$create = "CREATE TABLE $table_name (\n a varchar(255)\n)";
+		$expected = array( $table_name => "Created table $table_name" );
+
+		$actual = dbDelta( $create, false );
+
+		$this->assertSame( $expected, $actual );
+	}
+
+	/**
+	 * @ticket 31869
+	 */
+	function test_truncated_index() {
+		global $wpdb;
+
+		if ( ! $wpdb->has_cap( 'utf8mb4' ) ) {
+			$this->markTestSkipped( 'This test requires utf8mb4 support in MySQL.' );
+		}
+
+		include_once( ABSPATH . 'wp-admin/includes/upgrade.php');
+		$table_name = 'test_truncated_index';
+
+		$create = "CREATE TABLE $table_name (\n a varchar(255) COLLATE utf8mb4_unicode_ci,\n KEY a (a)\n)";
+		$wpdb->query( $create );
+
+		$actual = dbDelta( $create, false );
+
+		$this->assertSame( array(), $actual );
+	}
+}