Tests: Use assertSame() in WP_Comment::get_instance() tests.

This ensures that not only the return values match the expected results, but also that their type is the same.

Going forward, stricter type checking by using `assertSame()` should generally be preferred to `assertEquals()` where appropriate, to make the tests more reliable.

Follow-up to [38381].

Props costdev.
See #60706.

git-svn-id: https://develop.svn.wordpress.org/trunk@58054 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/comment/wpComment.php

@@ -33,7 +33,7 @@ public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
 	public function test_get_instance_should_work_for_numeric_string() {
 		$found = WP_Comment::get_instance( (string) self::$comment_id );
 
-		$this->assertEquals( self::$comment_id, $found->comment_ID );
+		$this->assertSame( (string) self::$comment_id, $found->comment_ID );
 	}
 
 	/**
@@ -60,6 +60,6 @@ public function test_get_instance_should_fail_for_non_numeric_string() {
 	public function test_get_instance_should_succeed_for_float_that_is_equal_to_post_id() {
 		$found = WP_Comment::get_instance( 1.0 );
 
-		$this->assertEquals( 1, $found->comment_ID );
+		$this->assertSame( '1', $found->comment_ID );
 	}
 }