More explicit test fixtures: key and count

These fields get automatic values during normal operation, but we
should make this explicit in tests which meddle with internals.  This
seems to add some clarity, and helps prepare for encapsulation.

Bug: T353451
Change-Id: I8b012a270f16139671f77ea04645d627b2fba87d

tests/phpunit/unit/ReferenceStackTest.php

@@ -945,16 +945,18 @@ class ReferenceStackTest extends \MediaWikiUnitTestCase {
 			],
 			'Safely ignore placeholder' => [
 				'initialCallStack' => [
-					[ 'increment', 1, 'foo', null, null, null, [] ],
+					[ 'increment', 2, 'foo', null, null, null, [] ],
 				],
 				'initialRefs' => [ 'foo' => [
 					[
+						'count' => -1,
+						'key' => 1,
 						'placeholder' => true,
 						'number' => 10,
 					],
 					[
 						'count' => 2,
-						'key' => 1,
+						'key' => 2,
 					],
 				] ],
 				'rollbackCount' => 1,
@@ -963,12 +965,14 @@ class ReferenceStackTest extends \MediaWikiUnitTestCase {
 				],
 				'expectedRefs' => [ 'foo' => [
 					[
+						'count' => -1,
+						'key' => 1,
 						'placeholder' => true,
 						'number' => 10,
 					],
 					[
 						'count' => 1,
-						'key' => 1,
+						'key' => 2,
 					],
 				] ],
 			],

tests/phpunit/unit/ReferencesFormatterTest.php

@@ -84,6 +84,7 @@ class ReferencesFormatterTest extends \MediaWikiUnitTestCase {
 					'a' => [
 						'count' => 0,
 						'key' => 1,
+						'name' => 'a',
 						'number' => 9,
 						'text' => 't1',
 					],
@@ -112,12 +113,14 @@ class ReferencesFormatterTest extends \MediaWikiUnitTestCase {
 						'extends' => 'b',
 						'extendsIndex' => 1,
 						'key' => 2,
+						'name' => 'a',
 						'number' => 1,
 						'text' => 't2',
 					],
 					'b' => [
 						'count' => 0,
 						'key' => 3,
+						'name' => 'b',
 						'number' => 1,
 						'text' => 't3',
 					],